Jamunapari Goats Research Articles

Association of single nucleotide polymorphism in leptin gene with growth traits of Jamunapari goat

The current study sought to identify single nucleotide polymorphisms (SNPs) in the leptin gene and investigate their relationship with growth traits in goats. Phenotypic data for birth weight (BW), weaning weight (WW), body weight at six month (6MW), body weight at nine month (9MW) and body weight at twelve month (12MW) from Jamunapari goats were recorded. Seven pairs of primers were designed to amplify the leptin gene spanning promoter, exonic, intronic and 3’ UTR regions by polymerase chain reaction. High Resolution Melting (HRM) was employed for genotyping, and DNA sequencing was utilized to mining SNPs. Four novel SNPs at g.584C>T, g.4226T>C, g.4158T>C and g.4133T>A were identified in promoter region and 3' UTR region of leptin gene. Statistical analysis revealed that SNPs at g.584C>T was associated with weaning and post weaning stages of growth. Moreover, goats with the CT genotype had higher body weight at WW, 6MW, 9MW and 12MW than those with CC genotype. The results of this study demonstrated that SNPs in leptin gene was significantly associated with growth traits in goat. These findings suggest that an SNP in the caprine leptin gene could be one of the candidates for improving body weight in the Jamunapari goat.

Use of Random regression model for modeling growth trajectory in Jamunapari goat in the semi-arid region of India

The objective of the study was to plot the trajectory of the growth curve in Jamunapari goat using B-spline (BS) function and compare it with the Legendre polynomial (LP) function of the random regression model (RRM) and also to assess the genotype and environment interaction for growth traits. The data was collected from 8763 descendants of 1845 dams and 339 sires. The RRM used direct genetic, direct maternal, permanent environment for animal and maternal permanent environmental effects in different orders of fit. The B-spline model (BSL6H5) was more robust compared to LP-RRM. The heritability (h2) estimates were 0.23 ± 0.03, 0.26 ± 0.02, 0.22 ± 0.02, 0.19 ± 0.02, 0.22 ± 0.02, respectively for birth weight (BW), three-month weight (3MW), six-month weight (6MW), nine-month weight (9MW) and twelve-month weight (12MW) from the best model. The h2 estimate indicated the further scope of genetic improvement through selection. The maternal proportion of variance was accounting for 3 to 8% variance across growth trajectory indicating the low influence of maternal effects that reduced significantly post-weaning. However, we observed that the animal permanent environment accounted for 45 to 69% of variance across growth trajectory. The genetic correlations between 6MW, 9MW, and 12MW were high and positive indicating scope for early selection. The genetic trends at 3, 6, 9, and 12 months of age were 0.065 kg, 0.082 kg, 0.098 kg, and 0.121 kg per year, respectively, indicating a favorable impact of selection for growth traits. The ranks of the sires at different time points based on breeding values through B-spline RRM were more robust as compared with estimates from the conventional animal model and LP-RRM, where the presence of genotype by environment (GxE) interaction resulted in significant re-ranking of sires for 9MW and 12MW. The B-spline RRM approach resulted in a pragmatic solution for the problem of GxE interaction across growth trajectories. We conclude that the B-spline RRM should be used for genetic evaluation of Jamunapari goats in the future for unbiased, accurate, and consistent prediction of breeding values.

First Molecular Study of Caprine Trypanosoma evansi Infection in Central India

Background: Diagnosis of Trypanosoma evansi among goat in field is still challenging due to scarce information on clinical manifestation and non availability of rapid reliable diagnostics. Molecular test such as PCR employed to diagnose the T. evansi with accuracy in both blood and tissues. Limited reports are available from different parts of the country on natural infection of T. evansi in goat. Mainly subclinical form of disease occurred in goats owing to low level of parasitaemia of T. evansi. Methods: A Jamunapari goat aged 1.5 years and weighing ~25 Kg was suffering from circling movement, pale conjunctiva and anorexia and was found positive for T. evansi by buffy coat examination and polymerase chain reaction. Diminazene aceturate was given intramuscularly as 7% water solution at a dose of 3.5 mg/kg b.wt. After 3 days, blood smear and buffy coat were negative for T. evansi and no band was found after running the product on 1.7% agarose gel stained with ethidium bromide. Result: The present study reveals first time report on caprine trypanosomosis from central India by conventional and PCR technique and placed on record. Hence, the goat should also be taken into consideration for control of trypanosomosis as goats are an important source of infection to other animals due to their reservoir nature for T. evansi.

Effects of concentrate mixture level on nutrient digestibility, growth, production and reproduction performance of Jamunapari goat under semi intensive condition

Twenty female Jamunapari goats of live weight of 10.5 ± 1.2 kg at 08± 0.56 months of age were used for 240 days feeding trial. Goats were assigned to four dietary treatments in a completely randomized design with five (05) goats in each group. All animals were supplied ad libitum green grass and water. They were supplied 150, 200, 250, 300 gm concentrate mixture per day with roughage for group T1, T2, T3, and T4 respectively. Total dry matter (TDM) intake (413.2, 456.67, 489.2 and 495.7g/day) in groups T1, T2, T3, and T4, respectively, was significantly (p≤0.01) influenced by the level of concentrate in the diet. Average total digestible crude protein (DCP) intake (3.1, 3.5, 3.9, 4.0 g/kg body weight and average total digestible nutrient (TDN) intake 21.1, 22.3, 24.7, 25.1 g/kg body weight was significantly (p≤0.01) higher in group T4 and lower in group T1. The nutrient intake and digestibility were also significantly higher (p≤0.01) in T4 group. The percent digestibility of dry matter (DM), organic matter (OM), crude protein (CP), crude fiber (CF), ether extract (EE) and nitrogen free extract (NFE) were 70.1, 75.99, 73.50, 67.24, 62.13 and 49.60%, 73.14, 76.97,76.84, 68.32, 64.04 and 53.25%, 75.45,78.44,78.67,70.43,68.43 and 59.77%, 79.56, 80.16,81.69,72.45,70.82 and 63.09% in T1, T2, T3 and T4 group, respectively. Reproductive performances, birth weight of kids and litter size did not differ significantly between groups, but had significant effect on feed digestibility and milk production. Daily 300 gm concentrate mixture along with roughage is necessary for better growth, production and reproduction performance of Jamunapari doe in semi-intensive system.
 Res. Agric., Livest. Fish.8(2): 223-230, August 2021

Ovarian Expression Profile of KISS1 and NGF Genes in Indian Goat

Background: Litter size is one of the most important economic traits that translates into higher returns for farmers. KISS 1 and NGF genes plays significant role in female reproduction. The purpose of the study was to evaluate the potential variation in the of expression levels of KISS1 and NGF genes in ovarian tissue of two different goat breeds with diverse prolificacy. Methods: Phenotypic records pertaining to litter size of Barbari and Jamunapari goats were collected. Total RNA was extracted from both breeds' ovarian tissues for real-time PCR quantification of the KISS1 and NGF genes, using GAPDH and β-actin as endogenous controls. The target gene’s expression levels were measured and the fold-change was determined. Result: The phenotypic recording revealed that Barbari goats are more prolific in nature than Jamunapari goats. The expression levels of KISS1 and NGF genes were higher in Barbari goat and lower in Jamunapari goat (P less than 0.05). The results of this study can be used to further discover the crucial role of KISS1 and NGF genes in reproduction for improving the prolificacy in goats.

​Comparative Growth Performance and Carcass Characteristics of Jamunapari, Barbari and their Crossbred under Stall Fed Condition

Background: Large variation for body size and weight exist among indigenous goat breeds. Many livestock development agencies recommending crossbreeding of large size goats with small and medium sizes to increase the body size, growth rate, dressing weight and dressing percentage of progeny without being systemic data and combining ability among breeds used. In view of above crossbreeding experiment was conducted by crossing Jamunapari male with Barbari female. Methods: Ten Barbari females were crossed with medium size two Jamunapari male. The crossbred males (07) were kept under stall feeding on high input diet along with Barbari and Jamunapari pure-bred males at weaning. The growth (body weight and average daily weight gains) were studied up to 9 months of age. The animals were slaughtered at 9 months and carcass traits (dressing weight and percentage) were studied. Result: Pre-weaning growth (0-3m) was statistically similar (P greater than 0.05) in all the group of goats. However different trend was obtained in post weaning growth stage, ADG being significantly (P less than 0.05) more in Jamunapari breed (94.10g) as compared to Barbari (73.43g) and crossbred goats (74.24g). The dressing (%) was significantly (P less than 0.05) higher in Jamunapari goats (47.28) as compared to Barbari (40.47) and crossbred (40.44). The carcass results revealed that growth and carcass performance was highest in Jamunapari kids and significantly different from pure bred Barbari and crossbred kids. However, Carcass traits (Carcass weight and Dressing percent) performances were not significantly different in between Barbari and Jamunapari x Barbari crossbred kids. Thus, crossing of Jamunapari with Barbari breed is not being suggested to increase body weight and carcass attributes of crossbreed progeny.

Genetic diversity and population structure of Jamunapari goat in India using pedigree analysis.

Pedigree records of 6821 Jamunapari goats of India were collected from 1980 to 2011 and used to evaluate the population structure and genetic diversity in this flock. Animals born between 2009 and 2011 represented the current reference population. The average pedigree completeness index (PCI) and numbers of equivalent complete generations (EqG) were estimated for the entire (PCI = 0.18, EqG = 2.24) and reference (PCI = 0.31, EqG = 3.45) populations. The average generation interval was 3.33 years. The average inbreeding coefficient and the average relatedness were 0.46 and 1.06%, respectively, for the entire population and 0.77 and 3.87% for the reference population. The rate of inbreeding was 0.06% per generation. The effective population size (Ne), estimated from increases in inbreeding coefficients between the first and third equivalent complete generations, was 52.65, but periodic introductions of unrelated breeding males resulted in average inbreeding levels in the reference population that were lower than those predicted from the estimate of Ne. Effective numbers of founders (fe), ancestors (fa), founder genomes equivalents (fg), and non-founder genomes (fng) were 51, 39, 25.8, and 48.2, respectively. The fe/fa ratio in the reference population was 1.31 and indicated that occasional bottlenecks had occurred in the population. The 14 most influential ancestors contributed 50% of the genetic variability in the reference population, with a maximum individual contribution of 9.25%. Approximately 1.9% of the initial heterozygosity had been lost from the population, indicating that substantial genetic diversity still exists in this flock.

Estimation of co (variance) components and genetic parameters for growth and feed efficiency traits in Jamunapari goat

Abstract Jamunapari goat is majestic dual purpose goat adapted to semi-arid climate in India. The aim of the present study was to assess the genetic potential of Jamunapari goat and design breeding program based on growth and feed efficiency traits. A total of 8763 animals descended from 1845 dams and 339 sires between 1982–2019 (37 years) at ICAR-Central Institute for Research on Goats, Makhdoom were used for the analysis. The effect of period and season of kidding, sex, type of birth and weight of doe at kidding was significant on live weights, average daily gains (ADG) and Kleiber ratio (KR). The estimates of genetic parameters were obtained for these traits by univariate and bivariate animal models using the average information restricted maximum likelihood (AIREML). Average inbreeding coefficient for the pedigree (N = 9418) was 0.83 % and amongst inbred animals (N = 3751), it was 2.045 %, indicating that the scientific mating could keep the inbreeding within normal limits in a nucleus flock. Genetic analysis revealed that the inclusive model for direct effect of animal and dam and their covariance and permanent environment of dam was best for birth weight (BW), however the model with direct effects of animal and dam along with their covariance was best for all other traits. Early growth traits were having significant maternal effect that faded as the age advanced. Correcting for maternal effects was essential to obtain unbiased estimated of heritability using univariate analysis. Moderate estimates of the heritability (h2) were obtained using multivariate analysis. The estimates were 0.17 ± 0.02, 0.19 ± 0.01, 0.20 ± 0.02, 0.16 ± 0.02, 0.17 ± 0.02, 0.20 ± 0.02, 0.14 ± 0.02, 0.13 ± 0.02, 0.22 ± 0.02, 0.14 ± 0.02 and 0.18 ± 0.02 for birth weight (BW), three month weight (3 MW), six month weight (6 MW), nine month weight (9 MW), twelve month weight (12 MW), ADG1 (birth to 3-month), ADG2 (three to six month), ADG3 (six to 12-month), KR1 (ADG1/3 MW0.75), KR2 (ADG2/6 MW0.75) and KR3 (ADG3/12 MW0.75), respectively. Results for multivariate analysis were similar but little better as compared to estimates from univariate analysis, provided we accounted for maternal effect appropriately. Moderate h2 estimates augurs the scope for selection of Jamunapari goats for growth and feed efficiency traits. The high and positive genetic and phenotypic correlations between post-weaning weights indicate that early selection of Jamunapari goat by reducing age at selection from 9-month to 6-month is possible owing to lower GxE and higher chances of retaining ranks by animals in adulthood. ADG and their corresponding KR have high genetic correlations and thus kids can be indirectly selected for higher feed efficiency. The selection index combining live weight at 6-month and post-weaning KR will be useful for early selection of Jamunapari goat.

Study on Genetic Polymorphism of IGF-1 Gene in Barbari and Jamunapari Goat

Insulin like growth factor (IGF 1) play an important role in the production and reproduction. One hundred and ninety two adult goats of Barbari and Jamunapari breed were taken for study. Data on growth traits were recorded to identify SNPs in the IGF-1gene by using High Resolution Melting (HRM) technique. Five fragments of IGF-1 were amplified length of amplicon were 105, 124, 150, 122 and 122 bp covering 5’UTR, 3’UTR, Exon 3, Exon 2 and 5’UTR regions, respectively and subsequently sequenced. The HRM analysis revealed no sequence variation among the samples of both breeds. Hence, the all five amplified fragments of IGF-1 gene showed monomorphic pattern and, no significant association could be detected with growth traits in Barbari and Jamunapari goats.

Milk composition traits in Jamunapari goats: Genetic parameters and effect of CSN1S1 gene variants

Milk protein polymorphism was analysed to improve the protein content in milk. The present study characterises the CSN1S1 gene and the effect of allelic combinations on milk composition traits in Jamunapari goats. The allelic variants obtained from sodium dodecyl sulfate polyacrylamide gel electrophoresis and polymerase chain reaction–restriction fragment length polymorphism were confirmed by cloning and sequencing. Genetic parameters were obtained from 518 records from 48 sires and 131 dams. The A, B and F alleles were observed in the population and the protein percentage in milk was significantly (P < 0.01) affected by allelic variants. The frequencies of A, B and F alleles were 0.456, 0.503 and 0.041, respectively. The protein content in milk was highest in the goats with AB genotype followed by AA > BB > BF > AF > FF. The goats with AB genotype had a significantly (P < 0.01) higher protein percentage in milk than goats with BF (t = 5.311, df = 113), AF (t = 8.13, df = 123) and FF (t = 9.55, df = 115) genotypes. The direct heritability for protein percentage was 0.441. Parity and season of birth had significant effects (P < 0.05) on the solids‐not‐fat percentage and lactose concentrations. The CSN1S1 AA, AB and BB genotypes should be selected for higher protein content and to improve milk quality and processing traits in Indian goats.

Phylogenetic analysis of Black Bengal and Jamunapari goats in Bangladesh based on partial sequence of cytochrome b gene

Goats, among the livestock species, are considered the most prolific ruminant especially under callous climatic conditions. The aim of the present study was to depict the current phylogenetic status and genetic diversities of Black Bengal (BBG) and Jamunapari goat of Bangladesh and the world. Cytochrome b (cytb) gene (1140 bp) of mitochondrial DNA of Black Bengal goats (Capra hircus) was amplified by Polymerase Chain Reaction (PCR) for the first time in Bangladesh. The sequence from BBG had no nucleotide (nt) difference and 100% homology with the BBG (C. hircus) of India and also the goats (C. hircus) from China (Yangtze River Delta White Goat), Thailand (Wild Cervidae), Japan (Bezoar goat) and South Africa (Domestic goat). The sequence had 1-5 nt differences and 99% homology with the goats (C. hircus) from China, Thailand and Japan (other goats), and also with the goats (C. hircus) from Malaysia, South Korea, France, Italy, Pakistan, Slovenia, Switzerland and USA. Phylogenetic tree constructed with Black Bengal Goat (BBG-K-2) and Jamunapari goats (SG-1) of Bangladesh with cytochrome b nucleotide sequences were closely related to China-HM7. China-YP xj46, Pakistan-Lineage C1, Pakistan-Lineage C2, Slovenia- ChSo1, Switzerland-ChTo2992 and shared 98.8% to 99% and 98.3% to 98.6% similarity, respectively and 1-1.2% and 1.4 to 1.7% genetic distance, respectively. Based on Ctb gene Sequence collected from Bangladeshi Black Bengal Goats (BBG-K-2) and Jamunapari goats (SG- 1) that were closely related and shared with the same genetic lineage of China HM18 and India-BBG-DQ073048, respectively, suggesting a common origin.
 SAARC J. Agri., 17(1): 23-35 (2019)

Assessment of subclinical mastitis in milch animals by different field diagnostic tests in Barishal district of Bangladesh

This study was carried out to assess the prevalence of subclinical mastitis in milch animals by different field diagnostic tests. A total of 100 milk samples (40 cow, 40 buffalo and 20 goat) were culled to pursue this study which were subjected to physical assay and subsequently screened for subclinical mastitis by using 5 different field diagnostic tests viz. California Mastitis Test (CMT), White Side Test (WST), White Side + Dye Test (WSDT), Surf Test (ST) and Surf + Dye Test (SDT). Overall prevalence of subclinical mastitis (SCM) found in this study was 42.5%, 32.5% and 35% in cow, buffalo and goat respectively. Higher prevalence of SCM was detected in cow (47.06%) and buffalo (53.85%) aged between 3 to 5 years whereas in goat (57.15%), 2 to 3 years of age. In aspect of breed, crossbred cow (50%), Murrah buffalo (40%) and Jamunapari goat (50%) were found more affected with SCM. The prevalence of SCM was higher in cows of 3rd parity (41.18%), buffaloes of both 2nd and 3rd parity (30.77%) and goats of 2nd parity (42.86%). Animals being in mid lactation gave more positive cases (46.67% cow, 46.67% buffalo and 42.85% goat). SCM was found in higher prevalence in high yielding animals and in animals that were not being subjected to hygienic milking practice. Among the 5 diagnostic tests, SCM detection efficacy in comparison was higher by CMT. So as SCM has been found to be a major ascending risk in the area, the hygienic milk production activity in this area as a whole requires an intervention including further investigation on the etiological agents associated with prevalence of mastitis to undertake measurable control options of mastitis in the area.
 Asian Australas. J. Biosci. Biotechnol. 2019, 4 (1), 24-33

Association of growth hormone gene receptor polymorphism with production traits in Jamunapari goat

Genetic polymorphism for GHR gene was carried out in Jamunapari kids by Polymerase Chain Reaction- Restriction Fragment Length Polymorphism (PCR-RFLP). Blood samples were collected from 200 kids for isolation of genomic DNA. The exon 1A (210 bp fragment), exon 10 (342 bp fragment) and 5’ non-coding region (318 bp fragment) of GHR gene were amplified and digested with MspI, AluI and NsiI restriction endonuclease, respectively. PCR-RFLP analysis for 5’ non-coding region revealed monomorphic pattern while exon 1A and exon 10 of GHR were polymorphic. The frequency of A and T alleles was 0.54 and 0.46, respectively, and frequency of three genotypes (AA, AT and TT) was 0.17, 0.74 and 0.09, respectively at locus exon 1A of GHR. The frequency of A and G allele for exon 10 was 0.53 and 0.47, and frequency of three genotypes (AA, AG and GG) was 0.16, 0.74 and 0.10, respectively. The genotype AG was associated with higher body weights at different growth stages. The goats with AG genotype were heavier to AA and GG genotypes by 4.91 and 42.85% at birth; 8.59 and 13.30% at 6 months; 8.02 and 17.25% at 9 months and 7.11 and 16.11% at 12 months, respectively. The locus was also a significant source of variation for biometrical traits (body weight, body length, heart girth) at different ages. AG genotype could be used as marker in selection for higher body weights in Jamunapari goats.

Establishing the genetic variation in physiological response in response to heat stress in semi-arid region in Jamunapari goats

ABSTRACTThe genetic variation in physiological response was analysed at population level in Jamunapari goats. The temperature humidity index (THI) range varied from 82.00 to 92.08 during hot period, 49.96 to 59.68 during cold period and 65.32 to 74.00 during thermo-neutral period. Physiological responses were recorded for 695, 617 and 291 animals during the hot, cold and thermo-neutral period, respectively. The sire mean of heat stress-susceptible (HSS) and heat stress-tolerant (HST) families differed by 19.737 in respiration rate (RR) and 31.438 in heart rate (HR). RR and HR were significantly different (P < 0.01) between HSS and HST phenotype. However, rectal temperature (RT) did not differ significantly (P < 0.01) between HSS and HST phenotype. The heritability of RT, RR and HR were 0.180 ± 0.058, 0.077 ± 0.044 and 0.307 ± 0.076, respectively. Genetic correlation between RT and HR was high during hot and cold period. The genetic correlation between RT and HR was high and positive during hot and cold period. The phenotypic correlation between RT and HR ranged from 0.132 to 0.190. The genetic correlation between RT with other traits was low and negative. Our finding indicates that phenotypic difference can be heritable.

Association of the CSN1S1 gene polymorphism with milk composition traits in Jamunapari goat

The genetic polymorphism of the CSN1S1 (casein alpha-s1) locus was investigated in Jamunapari goat breed by Sodium Dodicyle Sulphate – Poly Acrylamide Gel Electrophoresis (SDS-PAGE) and Polymerase Chain Reaction – Restriction Fragment Length Polymorphism (PCR-RFLP). A total of 122 milk and blood samples were collected. The SDS-PAGE pattern revealed the presence of four variants of CSN1S1 locus namely, A, B, E and F. The A allele of a-s1 – casein was observed in the majority of goats. The genotypic frequency of the AA, BB, BE, AF and FF genotypes of CSN1S1 locus were 0.437, 0.175, 0.250, 0.125 and 0.012, respectively. The PCR-RFLP was performed, six different variant groups of F allele (224)bp, the B/E allelic pair (161+63) bp, A/0 allelic pair (150+63) bp, AD allelic pair (212+150+63) bp, AF allelic pair (224+150+63) bp and BF allelic pair (224+160+63) were obtained after restriction digestion with XmnI. The genotypic frequency of AA, AD, AF, BB, BE, BF and BC genotypes were 0.274, 0.114, 0.147, 0.098, 0.163, 0.081 and 0.163, respectively. The allelic frequency of A, B, C, D, E and F were 0.360, 0.303, 0.081, 0.057, 0.081 and 0.114, respectively. The present study showed that AA genotype had significant effect on total protein content on the milk and AD genotype had significant effect on 90 day milk yield in Jamunapari goat. Thus the CSN1S1 genotype information in Jamunapari could be utilised in selection strategies, in order to select genetic stock for the production of goat milk with higher protein content in marker assisted selection to increase the rate of genetic gain.

Isolation, purification and immuno-biochemical charcterization of immunoglobulin G of Jamunapari goat (Capra hircus)

Isolation, purification and immuno-biochemical charcterization of immunoglobulin G of Jamunapari goat (Capra hircus)

Phenotypic characterization of Boer and Jamunapari goat under farming condition in Bangladesh

The objective of the study was to characterize of Boer goats and the Jamunapari goat available in Bangladesh under on-station condition. The study was conducted at Goat and Sheep Research farm of BLRI, Savar, Dhaka from January 2014 to June 2015 and animals were reared under standard intensive management system. The collected data was analyzed by SPSS 17.0 Statistical computer programme. The body coat color of Boer goat was white with reddish-brown head, ears and neck and the body coat color of Jamunapari goats was variety of colors. Both of them had horns but polled Jamunapari goats were also found. The body weight significantly (p&lt;0.001) differed between Boer goat (52.36±5.97 kg) and Jamunapari goat (39.26±3.00 kg). Horn length of Boer goat (19.01±1.29 cm) was significantly (p&lt;0.001) higher than Jamunapari goat (7.98±0.71 cm). Head width and teat length of Jamunapari goat (33.82±0.85 cm and 9.15±0.89 cm) were significantly higher (p&lt;0.05) than Boer goat (30.23±0.63 cm and 5.80±0.87 cm). Rump width significantly (p&lt;0.05) differed between Boer goat (17.87±0.61 cm) and Jamunapari goat (15.19±0.59 cm). The body length, height at wither, chest girth and ear length of Boer goat were 69.96±2.09 cm, 67.98±1.19 cm, 78.39±2.04 cm and 19.43±0.90 cm, respectively where as body length, height at wither, chest girth and ear length of Jamunpari goat were 72.13±1.63 cm, 69.69±1.29 cm, 79.18±2.04 cm and 21.23±0.66 cm, respectively. Phenotype wise Boer goats have distinct meat characteristics than the Jamunapari goats.&#x0D; Asian Australas. J. Biosci. Biotechnol. 2018, 3 (1), 28-32

Genetic analysis of growth parameters and survival potential of Jamunapari goats in semiarid tropics

Goats are adaptable to varied farming environments and contribute significantly towards sustainable livestock production and food security. Selective breeding of goats for improved performance is an important component of sustainable production. The objectives of the present study were to determine the most appropriate models of analysis for growth traits, to estimate genetic parameters, survival potential of kids from birth to 12 months of age and to estimate genetic trends for growth traits of Jamunapari kids at different ages. Genetic parameter estimates were obtained from 6590 records generated between 1982 and 2012 from 5922 animals with a pedigree covering over 13 generations. The most parsimonious model for early growth traits included permanent environmental effects due to the dam (PE) and litter effects. Similarly, the most appropriate model for early average daily gain (ADG) between birth and 3 or 6 months also included PE and litter effects. The estimates of heritability for survival from birth to 12 months of age ranged from 0.10 to 0.43. The estimates of heritability for ADG varied from 0.04 to 0.41. In general, higher estimates of heritability were observed when a sire model was fitted in the random effect. There was no genetic variation observed for survival between birth and 3 months of age. However, heritability estimates of between 0.18 and 0.39 were observed for survivability during post-weaning period to 12 months of age. The genetic trend at 9 months of age and 12 months of age was 0.144 kg 0.189 kg per year respectively. The genetic trend at all the ages was positive during the study period.

Incidence of Peste des Petits Ruminants in Rangpur sadar of Bangladesh

This epidemiological study was conducted to find out the incidence of Peste des Petits Ruminants (PPR) in goat and sheep at Upazilla Veterinary Hospital, Rangpur sadar, Rangpur during the period of January to April, 2014. In this period, 236 clinically infected goat and sheep were examined in which 22 (9.32%) PPR cases were diagnosed on the basis of history, clinical signs and gross pathological lesions. High fever (104-107 oC), mucopurulent oculo-nasal discharge, rapid and labored breathing, mouth lesion and diarrhea were the common clinical sign of PPR infected goat and sheep. The postmortem examination findings were dark red areas and congestion in different lobes of lungs, enlargement of spleen and lymph nodes, erosion of abomasums and characteristics zebra striping in the mucosa of colon. This present study reveals that about 7-12 months aged group of goats were more prone (40.91%) to PPR compare to adult (above 1 year) and Black Bengal goat was more susceptible (72.32%) than Jamunapari (27.78%) goat where the occurrence of PPR disease was more in goat (81.82%) than sheep (18.18%).Asian J. Med. Biol. Res. December 2017, 3(4): 529-533

Prevalence and bacterial etiology of subclinical mastitis in goats reared in organized farms.

Aim:Assessment of the status of subclinical mastitis (SCM) in Jamunapari and Barbari goats in Indian organized farms, the involvement of bacterial pathogens and their sensitivity to antibiotics.Materials and Methods:A total of 181 composite milk samples were aseptically collected from the apparently healthy Barbari (n=95) and Jamunapari (n=86) goats. The California mastitis test (CMT) and somatic cell count (SCC) were used to diagnose SCM. The milk samples with CMT scores of 0 and +1 were considered as negative, while the samples with the score of +2 or +3 were taken as positive, and further, the positive samples were used for the bacteriological examination. An antibiotic sensitivity test was performed by disk diffusion method using seven commercially available antibiotic discs.Results:All the samples having CMT score of +2 or +3 demonstrated SCC more than 1 million. Overall, the prevalence of SCM in the goats was assessed as 19.89% (36/181). The prevalence of SCM in Barbari and Jamunapari goats was found as 24.21% (23/95) and 15.12% (13/86), respectively. Out of 11 isolates of Staphylococci, 9 isolates were identified as coagulase-negative Staphylococci (CNS), whereas 2 isolates were found as Staphylococcus aureus. The identified bacterial isolates (n=30) did not show antibiotic resistance.Conclusion:The current investigation showed the considerable prevalence of SCM among Jamunapari and Barbari goats which may have a negative impact on quantity and quality of the milk. CNS was found as the most prevalent cause of SCM in the goats. Negligible antibiotic resistance was found among the identified udder pathogens.