Most Probable Producing Ability Research Articles

Repeatability and most probable producing ability of egg weight and one-day-old chick weight in Merawang chicken

Local Indonesian chicken from Bangka Belitung is known as Merawang. This chicken has dual purposes as a meat and egg producer. The objective of this study was to determine the repeatability and most probable producing ability (MPPA) of Merawang chicken’s egg weight and one-day-old chick (DOC) weight. 72 pullet Merawang chickens were raised in single bird cages and their egg weight was checked at 36-38 and 56-58 weeks. The DOC was weighed after the eggs were hatched. The rptR package and the restricted maximum likelihood (REML) method were utilized to estimate the repeatability. At 36-38 and 56-58 weeks, the average egg weight was 46.435.44 and 52.146.15, respectively. Meanwhile, the average DOC weight at 36-38 and 56-58 weeks were 31.92±4.54 and 35.40±4.36, respectively. The result showed that at 36-38 and 56-58 weeks, the repeatability of egg weight was 0.77±0.05 and 0.69±0.05, whereas the DOC weight was 0.84±0.04 and 0.64±0.07. The average MPPA ranges based on egg and DOC weights were 46.51-52.23 and 31.97-35.52, respectively. The pullets with MPPA above the average were 38.46%-50.72% (egg weight) and 48.94%-56% (DOC weight). The results from this study can be used for selecting the Merawang pullet.

Kemampuan Riil dan Tertaksir Sifat Produksi dan Reproduksi Sapi Perah di KAN Jabung

Production and reproductive characteristics affect the productivity of dairy cows in producing milk. The repeatability value uses to estimate the most probable producing ability (MPPA), which helps estimate the productivity of dairy cattle in the subsequent lactation period. The study aimed to determine the actual ability and accuracy of MPPA based on dairy cows’ reproductive and production characteristics. Secondary data from 124 Friesian Holstein dairy cows under the auspices of the Jabung Agro Niaga Cooperative, Malang Regency. The t-test compares data from the 3rd lactation period and the MPPA value. T-test results between MPPA and 3rd lactation of milk production 0.436; lactation length 0.387; dry period 0.051; DO 0.3; and CI 0.243. The five traits are more than 0.05, so they can be stated to be significantly the same as the real value in 3rd lactation. The results of the t-test for postpartum mating are 0.04 and S/C 0.002, significantly different from the actual value in the third lactation because it is less than 0.05. Based on the research results, the MPPA method accurately estimates the characteristics of lactation length, 305 days of milk production, dry period, days open (DO), and calving interval (CI).

Estimation of Repeatability and Most Probable Producing Ability (MPPA) of Sapudi Sheep Based on Daily Body Weight Gain of Lambs from Birth to Pre-weaning and Weaning

This research aimed to estimate the repeatability and MPPA values of Sapudi ewes based on the lamb’s daily gain from birth to pre-weaning and weaning. Using recorded data in a pedigree of lamb, 53 data with half-sib relationship came from 14 ewes which included the record of body weight gain of Sapudi lambs from birth to pre-weaning and weaning. The data were analyzed by descriptive method with a quantitative approach. The study showed that the average daily gain of pre-weaning and weaning was 007 kg/day. The repeatability value of pre-weaning and weaning daily gain was 0.636 in the high category and 0.377 in the medium category. The MPPA daily gain values for pre-weaning and weaning ranged from -0.032 to 0.018 and -0.016 to 0.009. The research concluded that the Sapudi sheep ewes based on the MPPA daily gain pre-weaning were six heads with four rankings, while the daily weight gain weaning was ten heads with ranking of five. The highest rank of Sapudi ewes in pre-weaning and weaning daily gain was ear tag 094 with MPPA values of 0.018 and 0.009. It is recommended that further research can be conducted to estimate the repeatability value of quantitative periodically as the basis for the selection and culling of livestock.

Estimation of Genetic Superiority and Reproductive Performance of Dairy Cows at different rearing locations

The objective of this study was to estimate the genetic superiority using the estimated breeding value (EBV) and most probable producing ability (MPPA), and to elucidate the reproductive performance of dairy cows at different rearing locations. This study used data from dairy cows in two locations, namely at the breeding dairy center (Group I) for 100 heads and the smallholder farm (group II) for 40 head cows. The survey method was used in this study. The parameters observed were total milk production, days open (DO), service per conception (S/C), and calving interval (CI). The data were analyzed descriptively and using a t-test. The results showed that cows in group I had more superior genetic potential. Productivity in groups I and II for the total milk production were 5.017,52±1.096,84 and 3.922,52±1.296,55 kg/head/lactation, respectively;DO was 141,45±64,30 and 281,68±92,42 days, respectively S/C were1,47±0,61 and 1,70±0,69 times, respectively; and CI was421,59±63,47 and 565,23±95,33 days, respectively. In conclusion, differences in management systems in breeding dairy centers and smallholder farms give different productivity. The results can be used for management improvement and increasing productivity strategies. Livestock selection can be done by estimating the genetic superiority using the estimated breeding value and most probable producing ability.

Estimation of Repeatability and the Most Probable Producing Ability (MPPA) Based on Birth Weight and Weaning Weight for Ranking of Sapudi Sheep

This study was conducted to estimate the repeatability and MPPA values of Sapudi ewe based on birth weight and weaning weight. Samples used 93 Sapudi lambs from 26 ewes that lambed three times, and the observed variables were lambing weight and weaning weight. Collected data were analyzed quantitatively. Estimating repeatability by analyzing the variance of the relationship between sibling and the parental rank was based on the relative MPPA formula.. The results showed that the average lambing and weaning weights were 2.789±0.206 kg and 10.058±1.470 kg. The repeatability of lambing and weaning weight were 0.108±0.119, and 0.565±0.104 belonged to the low and high categories. The average MPPA of lambing and weaning weight were 0.001 and 0.087. MPPA values of lambing and weaning weight range from -0.087 to 0.075 and -1.721 to 2.713. The highest ranking of the Sapudi ewe in lambing and weaning weight is ear tag 103 and ear tag 27 with MPPA 0.075 and 2.713. It can be concluded that there were 11 ewes with MPPA lambing and weaning weight above the average MPPA population that should be maintained in the population.

ESTIMASI NILAI RIPITABILITAS BOBOT SAPIH DAN MOST PROBABLE PRODUCING ABILITY KAMBING SABURAI BETINA DI KELOMPOK TANI GUYUP RUKUN KECAMATAN SUMBEREJO, KABUPATEN TANGGAMUS

This study aimed to determine the repeatability estimate of weaning weight and the Most Probable Producing Ability (MPPA) of female Saburai goats in the Guyup Rukun Farm Group in Sumberejo District, Tanggamus Regency which was conducted in November 2020. The method used in this study was a survey method using 50 Saburai does that had given birth twice from 2016-2020. The observed variables were birth weight, age of the dam at giving birth, weaning age, type of birth, sex and weaning weight at the first and second parity. Weaning weights were corrected for sex, the age of the dam, weaning age of 90 days, and birth type. The repeatability estimate was calculated using interclass correlation method. The Repeatability estimate then was used to estimate the MPPA of Saburai does. The results showed that the repeatability estimate of weaning weight of Saburai goat was 0.72 (high category). The average MPPA of weaning weight for Saburai does was 16.41±0.92 kg with the highest MPPA was 18.92±0.92 kg and the lowest MPPA was 14.96±0.92 kg. There were 18 does with MPPA values ​​above the average of the population in the farmer group with livestock code KI2, KI3, KS3, KI6, KI4, KI5, JW2, MD3, KI1, SK1, MG1, TW2, KS4, SY3, SK2, MG5, SR3, and KT3.
 
 Keywords: Most Probable Producing Ability, Repeatability estimate, Saburai Goat, Weaning Weight

Estimation of most probable producing ability of Bali cattle semen quality

This study aims to estimate the Most Probable Producing Ability (MPPA) values of semen quality in five Bali cattle bull that collected from January to October 2016 at Singosari AI Center. The semen quality parameter consists of semen volume (ml), motility (%), concentration (x106), and total sperm (x106/ml) observed in rainy and dry season. Data were analyzed using intraclass correlation to estimate the repeatability and MPPA values. The average of semen quality in rainy and dry seasons, respectively, in volume were 3.91-6.24 ml and 4.38-6.84 ml, motility was 46.31-70.00% and 48.26-70.45%, semen concentrations were 844.78-1059.02 × 106/ml and 1033.15-1260.16 × 106/ml, and total sperm were 3280.58-5964.50 × 106 and 4493.31-7206.96×106. In this study, dry season shows better semen quality parameter as well as the repeatability value, therefore the estimation of MPPA in dry season is more accurate compared to rainy season.

ESTIMASI NILAI RIPITABILITAS BOBOT SAPIH DAN MOST PROBABLE PRODUCING ABILITY KAMBING SABURAI BETINA DI KECAMATAN SUMBEREJO, GISTING, DAN KOTA AGUNG TIMUR KABUPATEN TANGGAMUS

The research was conducted with the aim of knowing the repeatability estimate and Most Probable Producing Ability (MPPA) value of the weaning weight of female Saburai goats. This research was conducted from July to September 2019 in Gisting, Sumberejo, and East Kota Agung districts, Tanggamus regency, which is the development area for Saburai goat seeds. This research used a survey method. The data used was in the form of primary data obtained from breeders through questionnaires and secondary data, namely in the form of farmer's goat records. The research material consisted of recording of female Saburai goats which had given birth more than twice. The records required in this study included age of dam at delivery, age of kid at weaning (weaning age), kid's birth weight, weaning weight of the kid, type of birth, and sex from 2016 to 2018, and questionnaires for breeders. The results of this study indicated that repeatability estimate of weaning weight of Saburai goat in Gisting, Sumberejo, and East Kota Agung districts were 0.478 (high category), 0.19 (low category) and 0.13 (low category), respectively. The results also indicated that the average MPPA value of weaning weight for Saburai goats in Gisting, Sumberejo, and East Kota Agung districts were 21.91 � 0.04, 17.91 � 0.06, and 9.88 � 0.01, respectively. 
 Keywords: Most probable producing ability, Repeatability estimate, Saburai goat

Boron supplementation in peripartum Murrah buffaloes: The effect on calcium homeostasis, bone metabolism, endocrine and antioxidant status

BackgroundCalcium homeostasis and immuno-endocrine system undergoes drastic changes in peripartum dairy animals and failure to adapt these physiological changes causes major impact on animal health as well as productivity. Boron (B), a newer trace element, influences calcium (Ca), phosphorus (P) and magnesium (Mg) metabolism as well as immune system by manipulating several hormones or enzyme systems. Present study was conducted to determine the effect of dietary B supplementation on Ca homeostasis, bone metabolism, endocrine and antioxidant status in peripartum Murrah buffaloes. MethodsThirty advanced pregnant Murrah buffaloes (8th month pregnant) were allocated into three groups based on their most probable producing ability (MPPA) and parity (n = 10 in each group) viz. B0, B200 and B400 and supplemented with 0, 200 and 400 ppm of B in the form of boric acid. Blood samples were collected at periodic intervals (-45, -30, -21, -15, -7, 0, 7, 15, 30, 60, 90 and 120 day relative to expected date of calving) and analysed for minerals concentration, hormonal profile, bone health biomarkers and antioxidant enzymes. Results and conclusionBoron supplementation at 200 and 400 ppm increased (p < 0.05) plasma Ca, Mg and osteocalcin (OCN) concentration during postpartum stage. Higher (p < 0.05) levels of plasma 25-hydroxy vitamin D3 were observed in both B supplemented groups as compared to B unsupplemented group irrespective of physiological stages. Plasma parathyroid hormone (PTH) and cortisol levels were lower (p < 0.05) in both B supplemented groups than B unsupplemented group, especially during postpartum stage. Whereas, plasma ferric reducing total antioxidant power (FRAP) activity was found to be higher (p < 0.05) in B supplemented groups as compared to B unsupplemented group. Furthermore, antioxidant enzymes (erythrocytic superoxide dismutase; SOD, catalase, glutathione peroxidase; GPx), plasma level of total immunoglobulins (TIg), bone specific alkaline phosphatase (BALP) and tartrate resistant acid phosphatase (TRAP) remained unaffected by dietary B supplementation. Overall, it can be concluded that supplementation of B at 200 ppm in the diet of peripartum Murrah buffaloes helped to induce metabolic adaptations for improving Ca homeostasis, bone metabolism and antioxidant status without much additional benefits at higher level used in the present study.

ESTIMASI NILAI PEMULIAAN DAN MPPA (Most Probable Producing Ability) KUDA PACU BERDASARKAN SIFAT KECEPATAN LARI

ESTIMATION BREEDING VALUE AND MPPA (Most Probable Producing Ability) OF RACEHORSES BASED ON NATURE OF RUNNING SPEED. The aim of this study was to obtain the estimated number of breeding values from the racehorses parent in Minahasa for racehorse selection based on the superiority of genetic traits of speed. The descriptive analysis such asaverage, standard deviation and coefficient of variation of the speed and performance were done as the first step. Heritability, ripitability and the probability of breeding value (PBV) were calculated after all. The results of this study indicate that the value of heritability and repeatability obtained varies from low to high. The highest estimation of breeding value (PBV) for male (H), the highest MPPA (Most Probable Producing Ability) value in the population (individual B010) and the average MPPA value for the entire population were 0.0869, 0.1845 and 0.0239 respectively. The conclusion of this study puts the racehorse with the name "Swift Jhon" and "Super Princes" as males and individuals who have an average increase in the nature of the highest running speed. Keywords: Racehorse, Speed, EBV, MPPA

ESTIMASI NILAI RIPITABILITAS DAN NILAI MOST PROBABLE PRODUCING ABILITY BOBOT LAHIR SAPI PERANAKAN ONGOLE DI DESA WAWASAN KECAMATAN TANJUNG SARI KABUPATEN LAMPUNG SELATAN

This study aimed to determine the value of repeatability and Most Probable Producing Ability (MPPA) of birth weight of Ongole grade cattle (PO) in Wawasan Village, Tanjungsari District, Lampung Selatan Regency. The method used in this study was a survey conducted in February-April 2019 in Wawasan Village, Tanjungsari District, Lampung Selatan Regency, Lampung Province. The material used was 61 female PO cattle that gave birth twice in 2015 to 2019 and had a birth weight record for their offspring. The variables observed were recording of birth weight and sex of PO calves generated from the mothers in the first parity and second parity. Birth weight data were corrected for sex to calculate the estimated value of repeatability using interclass correlation. The results showed that the average of corrected birth weight was 25.21 ± 1.67 kg with a birth weight repeatability value of 0.24 and the average MPPA value of 25.21 ± 0.65 kg. A total of 32 dams (52.46%) can be selected as parents in the breeding area. Based on these results it can be concluded that the genetic quality improvement of PO cattle in Wawasan Village, Tajungsari District could be done through parent selection based on the MPPA value of birth weight.&#x0D; &#x0D; Keywords: PO cattle, Repeatability estimate, Most Probable Producing Ability, Birth weight

Estimation of Repeatability Value of Weaning Weight and Most Probable Producing Ability (MPPA) of Saburai Doe in Tanggamus Regency

The aim of this study was to estimate the value of repeatability of weaning weight and Most Probable Producing Ability (MPPA) value of Saburai Doe in village breeding center (VBC), located in Tanggamus Regency. This research was conducted in Sumberejo and Gisting districts in January to May 2018. Data collected in this study included the recording data of kids’ birth, birth weight, weaning age, weaning weight, offspring sex from 122 doe who have given birth twice from 2015 to 2017. The study was carried out by using survey method to know weaning weight, estimated repeatability values, and MPPA values of Saburai doe in Sumberejo and Gisting district. Results of this research shows that the average corrected weaning weight of Saburai Doe in Sumberejo and Gisting district were 16.59±3.45 and 16.93±2.90, with the repeatability value were 0.76 and 0.59 (high category), respectively. The result also shows that the average value of MPPA of Saburai Doe were 16.59±2.98 and 16.93±2.15, respectively. There were 10 doe with the highest MPPA value consisting of 5 does from Sumberejo district K2 22.07, Y3 21.95, Y4 21.80, K1 21.39, AD3 21.38 and 5 does from Gisting District D3 22.03, B1 21.09, D4 20.98, A1 20.83, D5 20.74. It is suggested to select Saburai Doe with the best MPPA to improve productivity of Saburai Doe for the next generation.

ESTIMASI NILAI RIPITABILITAS DAN NILAI MPPA (MOST PROBABLE PRODUCING ABILITY) BOBOT SAPIH SAPI PERANAKAN ONGOLE (PO) DI DESA WAWASAN KECAMATAN TANJUNGSARI KABUPATEN LAMPUNG SELATAN

This research aims to estimate the value of ripeatability and Most Probable Producing Ability (MPPA) for weaning weight of Ongole grade cattle. This research wascarried out on 29 June--29 July 2018 in Wawasan Village, Tanjungsari District, South Lampung Regency, Lampung Province. The research material used consisted of the age of the mother at the time of delivery, calf birth weight, calf weaning age, calf weaning weight, and recording data in 2013--2017 . This study used a survey method. Data analysis was carried out by estimating corrected weaning weights, ripitability values, and MPPA. Based on the results of this study the average value of corrected weaning weight was 111,81±13,56; ripitability value was 0,6, and the average value of MPPA was 245,98±29,83. Ripitability value of 0.6 estimated in this study included in the high category. This study also showed that there were 56,76% of cows which had MPPA values above the average (245,98±29,83). &#x0D; Keywords: MPPA, PO cattle, Ripitability estimate, Weaning weight.

The evaluation of estimated breeding value and the most probable producing ability for the basis selection of Ettawa crossbred goat (Capra hircus sp.) at Malang, East Java, Indonesia

Ettawa crossbred goat is Indonesia local breed goat that a dual purpose type, namely meat and milk production. The milk production is less but can improve by upgrading with other breeds like Saanen goat. The selection program is an effective way to upgrade the genetic performance of Ettawa goat. The Estimated Breeding Value (EBV) and Most Probable Producing Ability (MPPA) can be considered on the selection program. The purpose of this study was to determine the milk production different and the EBV and MPPA values of Ettawa goats. This research was carried out by survey method on goat farmers. The second lactation of milk production was stated as the data variable. The analysis of variance from nested design showed that any significant different (P < 0.05) in milk production between the district and very significantly different (P < 0.01) between sub-districts of Malang region. The highest EBV was 0.389 L from Bumiaji sub-district as well as the highest MPPA was 0.595 L from Bumiaji sub-district. So, based on the EBV and MPPA values of Ettawa crossbred goat from Bumiaji sub-district of Batu Regency could be chosen as the basis population on the breeding program of dairy milk in Malang region.

ESTIMATION OF MOST PROBABLE PRODUCING ABILITY VALUE FOR CALF BIRTH'S PERFORMANCE IN SUMBA ONGOLE COWS

An estimation of most probable producing ability (MPPA) value based on the calves performance is very important for the cow selection. The birth data record of 48 Sumba Ongole (SO) cows and record data from 52 callf birth’s performance were used to estimate the value of MPPA. High of r value (r &gt; 0.30) was obtained at the body length (BL). Birth weight (BW), withers high (WH) and chest girth (CG) had a moderate value (0.10 &lt; r &lt; 0.30) of repeatability. The MPPA value of the cumulative calf birth’s performance of cows based on the highest birth records was 4.64 (cow number 3770) and the lowest was -4.64 (cow number 2283). Calf number B2076 (cow number 3586) had the highest ratio of WH (115.70); BL (124.26); CG (118.90), while the highest ratio of BW (168.35) was obtained in calf number B2095 (cow number 3731). It was concluded that the BW of birth had a moderate value of r (0.10) and could be used as a selection criteria accurately.

Evaluation of Red Chittagong Cows Based on Test Day Milk Production

The merit of Red Chittagong cows-a promising indigenous cattle genetic resource of Bangladesh was evaluated by using test day milk yield records of total 41 individuals. The data were collected from the Nucleus Herd of Red Chittagong (RC) cattle maintained at Bangladesh Agricultural University, Mymensingh from June, 2007 to October, 2008 under supervised animal recording system along with the previously recorded data from 2005 was also taken into consideration. Data were then analyzed for evaluating the cows based on lactation yield and average daily milk yield. Average lactation yield and daily milk yield were 453.86 ± 59.61 and 1.99 ± 0.14 kg, respectively. The highest lactation yield (538.04 kg) and daily milk yield (2.3 kg) was found in 4th and 5th lactation, respectively. The most probable producing ability (MPPA) of RC cows was calculated by using the test day records and then the animals were ranked on the basis of their MPPA value. For MPPA calculation two methods were followed; cow’s repeated lactation performance (MPPA1) and within lactation repeated test day records and averaged (MPPA2). The highest MPPA for lactation yield was shown by the cow no. 36 (645.61 kg) and the highest MPPA1 and MPPA2 for daily milk yield were 2.83 and 3.46 kg, respectively for cow no. 03. The result of this study suggests that test-day yields may well be used for genetic evaluation of cows to make recurrent selection decision in cattle breeding programs.DOI: http://dx.doi.org/10.3329/pa.v19i2.16950 Progress. Agric. 19(2): 101 - 109, 2008

ESTIMASI POTENSI GENETIK SAPI PERAH FRIESIAN HOLSTEIN DI TAURUS DAIRY FARM, CICURUG, SUKABUMI

&lt;p&gt;The objective of this study was to estimate potential genetic of Friesian Holstein at Taurus Dairy Farm, Cicurug, Sukabumi. Data observed were secondary data of milk yield, calving interval, service per conception, age at first calving, and length of lactation records of cows that have been experiencing one or more lactation since year 2003 to 2009, then were standardized based on milk yield by using correction factor 305 days of lactation period and mature equivalent (ME). Production trait (milk yield), reproduction traits (CI, S/C, length of lactation, and age at first calving) were analyzed by descriptive statistic. Data were analyzed by paternal half-sib correlation and nested method to get heritability, while the repeatability value were obtained by interclass and intraclass correlation method. Heritability and repeatability value then was used to count most probable producing ability (MPPA) and estimated real producing ability value and estimated transmitting ability (ETA) and breeding value (NP) of dairy cows. Estimates of heritability of milk yield by using nested are 0.287±0.135 (h2s), 0.310±0.154 (h2d), and 0.299±0.103 (h2(d+s)), and paternal half-sib correlation method was 0.63±0.23. Estimates of CI heritability with paternal half-sib method was 0.46±0.23, and values obtained using nested were 0.038±0.106 (h2s), 0.733±0.231 (h2d), 0.385±0.117 (h2(d+s)). Estimated heritability of S/C&lt;br /&gt;with paternal half-sib method was 0.001±0.110 and using nested method are -0.022±0.043 (h2s), 0.098±0.133 (h2d), 0.038±0.072 (h2(d+s)). Estimated value of milk yield repeatability with interclass correlation was 0.43±0.1 and intraclass correlation was 0.15±0.05. CI repeatability value with interclass correlation method was 0.00±0.09 and intraclass correlation was 0.19±0.07. S/C repeatability value with interclass correlation method was 0.12±0.15 and intraclass correlation was 0.02±0.05. Based on the calculation, the highest five ranks on the estimated relative value of MPPA and ERPA from 147 holstein friesian dairy cows with interclass repeatability method and 279 Friesian Holstein&lt;br /&gt;dairycows with intraclass method were 1966, 1941, 2180, 2087, and 2248. Database, Kimball, Beam, Doeboy, Paul, Varlour and Cassela get the highest rank, based on the estimated value of ETA and NP for 40 bulls using paternal half-&lt;br /&gt;sib heritability method and 38 bulls using nested heritability method.&lt;/p&gt;&lt;p&gt;(Keywords: Friesian Holstein dairy cows, Milk yield, Reproduction traits, Genetic parameter)&lt;br /&gt;&lt;br /&gt;&lt;/p&gt;

Estimasi Parameter Genetik Sifat Produksi Sapi Simmental di Balai Pembibitan Ternak Unggul Sapi Potong Padang Mengatas, Sumatera Barat (Estimation of Genetic Parameters of Production Characteristics on Simmental Cattle at Balai Pembibitan Ternak Unggulan

&lt;p&gt;The objectives of this research were to estimate the genetic parameters of production characteristics, breeding value (BV), weaning weight ratio (WWR) correlation with BV and most probable producing ability (MPPA) of Simmental cattle reared at Balai Pembibitan Ternak Unggul Sapi Potong Padang Mengatas. Research was based on records of birth weight (BW), weaning weight (WW), post weaning average daily gain (ADG) and yearling weight (YW) from 2002 to 2007. Heritability value (h2) was estimated for BV, WW, ADG and YW using paternal-half sib correlation and repeatability value (r) of characteristics of both using intra class correlation. The genetic correlation (rG) of BW-WW, WW-YW, WW-ADG, WW-YW, WW-ADG and YW-ADG were analyzed by variance and covariance. BV and MPPA estimation was base on record of weaning weight. The h2 value of BW, WW, YW and ADG were 0.11±0.09; 0.39±0.16; 0.43±0.19; and 0.46±0.20, respectively. The r of BW, WW, YW and ADG, were 0.25±0.16; 0.32±0.18; 0.25±0.22; and 0.34±0.16, respectively. The genetic correlation value of BW-WW, WW-YW, WW-ADG, WW-YW, WW-ADG and YW-ADG were 0.29±0.37; 0.46±0.33; 0.2 ±0.39; 0.68±0.16; 0.006±0.30 and 0.57±0.21, respectively. From 18 Bulls, 10 bulls (55.56%) had the BV higher then average population value, 142.21 kg and the remaining 8 bulls (44.44%) was lower then average population value. Frequency of the BV of prospective male and female with WW higher than WW average was 210 calves (44.68%); whereas, 260 calves (55.32%) had WW lower than average population corrected with parent age (130.21 kg). Range of absolute BV was from 112.77 kg to 155.91 kg. The BV of male had average frequency higher than that of female, i.e. 149 males (66.22%) compared to 61 female (24.90%). The MPPA with above the average WW of the population was 150 cows (41.67%) and the rest of cows (210 head or 58.33%) were under the&lt;br /&gt;average. The WWR had positive and significant correlation (1.00**) with the NP. It means that, if the cattle have a high WWR, they will also have a high NP, so that they can be used as the criteria of selection.&lt;/p&gt;&lt;p&gt;(Key words: Simmental cattle, Genetic parameters, Breeding value, Most probable producing ability, Weaning weight ratio)&lt;br /&gt;&lt;br /&gt;&lt;/p&gt;

PENDUGAAN DAYA PRODUKSI SUSU DAN BEBERAPA NILAI PARAMETER GENETIK PADA SAPI PERAH FRIES HOLLAND

The aims of the present research were to calculate some genetically parameters for estimation of milk production potency of dairy cattle based on the recorded data for 10 years of production. Parameter calculated included: heredity, repeatability and production capacity. The data was collected from PT. Taurus Dairy Farm Sukabumi during the period of 1990-2000. Heredity and repeatability values were determined by variance and covariance analysis based on paternal half in completely randomized design. Calculation of milk production capacity was based on most probable producing ability (MPPA) formula. Results showed that the highest milk production of about 3.565.71  670.021 kg/y was obtained during the first lactation period and followed by the fourth lactation period of 3.331,80  806,35 kg/y. The highest heredity value of 0,36  0,35 was obtained at first lactation, followed by third lactation of 0,25  0,31, fourth lactation 0,22  0,30. The repeatability value of milk production was found 0, 33.

Performances of composite genotype resulting from crossingbetween local sumatera and hair sheep under confinement condition

Under semi-intensive conditions, the composite genotype (K) (25% Barbados Blackbelly; BB, 25% St. Croix; SC, 50% Sumatra Thin Tail; DETS) showed relatively have similar weaning weight as compared to other contemporary crossbred, therefore under intensive conditions (confined), they are expected to have better performances. The objective of the study are to find performances of the second generation composite genotype lambs and the first generation performances of the ewes, as well as several genetics parameters under intensive conditions, and compared to the Barbados Blackbelly Cross (BC) as contemporary crossbred. The growth of pre- and post-weaning of BB crossbred (BC) and the second generation of composite genotype (K-F2) are relatively the same. Growth curve using Von Bertalanffy model with the equation of Wt (t) = A*(1-B*e**(- K*t)), show that the equation for BC is Wt (t) = 26.8(1-0.92e**(-0.01t) and for K-F2 is Wt(t) = 26.1(1-0.92e**(-0.01t). This equation indicate that the growth of BC and K-F2 is not significantly different. The BC and K-F2 genotype reach maturity at the weight of 26.8 and 26.1 kg, respectively, and both with rate of reaching maturity of 0.01. Mating weight and weight at lambing of those two genotypes are around 29 - 30 kg dan 31 kg, respectively. The mean of litter size of BC and K-F1 are 1.52 and 1.48, respectively or around 1.5. The average litter size at weaning are 1.39 and 1.34, respectively for BC and K-F1. This means that pre-weaning mortality are around 5.37 and 9.76%, respectively for BC and K-F1. The lambing interval of BC and K-F1 are 211 and 223 days, or 0.58 and 0.61 year, respectively. Therefore the reproductive rate (RR) of the respective genotype are 1.39/0.58 = 2.39 and 1.34/0.61 = 2.19, respectively. The average of litter weight at weaning (LWW) of BC x BC, SC crossbred (HC) x BC and K-F1 x K-F1 are 11.62, 12.60 and 11.83 kg, respectively. Therefore based on the ewe genotype the LWW of BC and K-F1 are 11.74 and 11.83 kg, respectively. Flock productivity (FP) for those two genotypes per year are 20.24 and 19.39 kg, respectively for BC and K-F1. Dam productivity index (DPI) that calculated as /ewe weight for those two genotypes are 0.67 and 0.66, respectively for BC and K-F1. Meanwhile, the flock efficiency index (FEI) that calculated as FEI = FP/ewe weight0.75 for the respective genotypes are 1.57 and 1.54 for BC and K-F1. The estimates of repeatability of litter weight at weaning show relatively low value (0,092), therefore the estimate of MPPA (Most Probable Producing Ability) for predicting the future productivity is relatively the same. The estimate of MPPA for litter weight at weaning (LWW) for the respective genotype are 11.79 and 11.81 kg, respectively for BC and K-F1. Results of the study show that performances of composite genotypes (F) and the contemporary crossbred (BC) are relatively similar in the traits of growth, dam productivity and the estimate of MPPA. Key words : Composite sheep, performance of production and reproduction, intensif condition