Genetic Variability For Yield Research Articles

Genetic Dissection for Yield and Fruit Quality Traits in Tomato (Lycopersicon esculentum Mill.)

The genetic variability for yield, its attributing, and fruit quality traits using 38 tomato genotypes was studied. High significant differences among the genotypes were found for all recorded traits. Phenotypic coefficient of variation was greater than genotypic coefficient of variation for all the traits indicating the presence of environmental influences. Most of the traits expressed moderate to high heritability. Plant height, number of seed/fruit, chlorophyll content in top leaf, red fruit weight, number of fruit/plant, soluble solid content in exocarp and endocarp of red fruit, titratable acidity of red fruit juice, lycopene content, beta-carotene and yield/plant had high heritability along with high genetic advance as percentage of the mean. Yield/plant exhibited a significant positive correlation with number of fruit/plant, number of flower/bunch, red fruit girth, red fruit length and red fruit weight. Path analysis revealed soluble solid content in endocarp of red fruit, number of fruit/plant, plant height, number of bunch/plant, number of flower/bunch, number of seed/fruit, green fruit length, red fruit girth, red fruit length, red fruit weight, lycopene and beta-carotene content had direct positive effect on yield/plant. Principal component analysis depicted first eight PCs with Eigen-value higher than one contributing 76.74% of total variability. Thirty-eight genotypes grouped into seven clusters where cluster II contains maximum genotypes. Based on the mean performance, genotypes Tm-131 and WOP-10 for yield and ascorbic acid content; Puli-25, VI005584 and Tm-2 for total soluble solids; VI-063607 and VI-0337183 for lycopene and beta-carotene content may be considered as superior genotypes which can be used as potential genetic resources for the development of nutritionally rich high-yielding tomato variety.

Genetic Variability for Yield and Yield Attributing Traits in Finger Millet (Eleusine coracana L. Gaertn) under Irrigation in Central India

Genetic Variability for Yield and Yield Attributing Traits in Finger Millet (Eleusine coracana L. Gaertn) under Irrigation in Central India

Genetic variability of yield and yield-related traits among 27 drought-tolerant maize genotypes

Abstract Maize is a valuable crop with high genetic variability, and understanding this variability is essential for improving crop productivity and resilience to environmental stressors. This study evaluated the genetic variability and heritability of yield and yield-related traits among 27 drought-tolerant maize genotypes in a humid climate region of Southwestern Nigeria. The experiments followed rigorous agronomic, soil, and climatic requirements for maize cultivation. Our findings revealed significant genetic variability among the traits of the maize genotypes, particularly in the number of ears per plant, which had the highest genetic advancement as a percentage of the mean (68.25 % and 67.83 %) under both well-watered and drought conditions, respectively. This suggests that breeding programs targeting this trait could significantly improve maize productivity and resilience to drought stress. Additionally, most of the agronomic traits targeted were highly heritable with heritability values ranging from 0.76 to 0.99 under both environments where the genotypes were evaluated, thus indicating that selective breeding for these traits could lead to consistent improvements in maize yields over time. Overall, this study highlights the importance of evaluating yield-related traits’ genetic variability and heritability in maize breeding programs. Findings suggest that targeting the number of ears per plant in drought-tolerant maize genotypes as revealed in the study could be an effective approach for improving crop productivity and resilience in regions with variable moisture regimes.

Assessment Effect of Mutations on Genetic Variability of Yield and Its Components in some Genotypes of Peanut (Arachis hypogaea L.)

Assessment Effect of Mutations on Genetic Variability of Yield and Its Components in some Genotypes of Peanut (Arachis hypogaea L.)

Genetic variability of yield and yield components for segregating generations in sesame (Sesamum indicum L.)

Genetic variability of yield and yield components for segregating generations in sesame (Sesamum indicum L.)

Genetic Variability of Yield and its Components in Little Millet [Panicum sumatrense L.]. Local Germplasm

The fifty little millet genotypes were used to study Genetic variability, heritability and genetic advance. The highest estimates of GCV and PCV values were recorded seed yield plant-1 and iron content. Moderate estimates of GCV and PCV values were recorded panicle weight plant-1, total number of tillers plant-1, days to 50 per cent flowering and productive tillers plant-1. Almost all the characters showed high percentage of heritability except productive tillers plant-1 and panicle length showed medium heritability, while number of branches panicle-1 showed low heritability. It indicates that charactersis least influenced by the environmental effect, suggesting scope for improvement of respective characters. The characters iron content, seed yield plant-1, panicle weight plant-1, total number of tillers plant-1 and productive tillers plant-1 showed high heritability accompanied with high genetic advance, it indicates that selection is effective for this characters.

Genetic variability for yield and fiber related traits in genetically modified cotton

BackgroundCotton (Gossypium hirsutum L.) is grown for fiber and oil purposes in tropical and sub-tropical areas of the world. Pakistan is the 4th largest producer of cotton. It has a significant contribution in the GDP of Pakistan. Therefore, the present study was performed to assess the genetic variations and genetic diversity of yield and fiber quality traits in cotton and to analyze the associations present among them.ResultsAnalysis of variance exhibited significant variation for all studied traits except total number of nodes and the height to node ratio. The phenotypic coefficient of variation was higher than the genotypic coefficient of variation for all studied traits. Plant height, monopodial branches, total number of bolls, lint index, seed index, and seed cotton yield displayed high heritabilities in a broad sense with maximum genetic advance. Correlation analysis revealed that seed cotton yield had a significant positive association with plant height, the number of monopodial branches, the number of sympodial branches, ginning outturn (GOT), the number of bolls, seed per boll, seed index, uniformity index, the number of sympodial branches, reflectance, and seed index at the genotypic level while a significant positive relationship was observed with plant height, the number of sympodial branches, boll number, and GOT. Plant height, monopodial branches, GOT, boll weight, seeds per boll, and short fiber index exerted direct positive effects on seed cotton yield. The first 6 principal component analysis (PCs) out of the total fourteen PCs displayed eigenvalues (> 1) and had maximum share to total variability (82.79%). The attributes that had maximum share to total divergence included plant height, uniformity index, the number of sympodial branches, seed per boll, GOT, seed cotton yield, and short fiber index.ConclusionThe genotype AA-802, IUB-13, FH-159, FH-458, and CIM-595 were genetically diverse for most of the yield and fiber quality traits and could be utilized for the selection of better performing genotypes for further improvement.

Genetic Variability for Yield and Its Related Traits in Green gram [Vigna radiata (L.) Wilczek

Background: Green gram [Vigna radiata (L.) Wilczek] is an ancient and well known pulse crop of Asian countries. Specific traits should be considered for high yield in green gram as selection criteria in future breeding program.Methods: The investigation material comprised of 128 F6 RIL (Recombinant Inbred LINE) population sown at college farm, Professor Jayashankar Telangana State Agricultural University during Rabi-2019-20. The yield and yield attributes were recorded to conduct genetic variability, heritability broad sense (h2), genetic advance (GA) and genetic advance as % of mean (GAM).Result: Analysis of variance revealed significant differences among the RILs, indicating the presence of genetic variability for almost all the traits studied. High PCV and GCV estimates was noticed for number of pods per plant, seed yield per plant, number of cluster per plant and number of pods per cluster. High heritability along with high genetic advance as per cent of mean was observed for number of pods per plant, seed yield per plant, number of cluster per plant, number of pods per cluster, number of branches per plant, number of seeds per pod and plant height indicating the role of additive genes in governing the inheritance of these traits and could be improved through selection. The traits viz. seed yield per plant, number of pods per plant, number of clusters per plant and number of pods per cluster had recorded high PCV, GCV, high heritability along with high genetic advance as per cent of mean indicated these traits were less influenced by environment and possess high genetic variability. Hence these RILs would be suitable for green gram breeding programmes to develop improved varieties. The present findings of the RIL population will be useful for development of high seed yielding variety in green gram.

Assessment of genetic variability in cucumber (Cucumis sativus L.)

Information on genetic variability of yield and quality components is of vital importance in crop improvement programme. Plant breeding is mainly the exploitation of genetic variation and in view of the possible decline of variation breeders should always examine means of conserving variability and creating new germplasm. The extent of genotypic variability indicates the amenability of given character for its improvement. The present investigation was carried out during summer season of 2018 in Tarai region of Uttarakhand. The experimental material comprised of 36 genotypes including 8 parents and 28 F1 hybrids. Assessment of genetic variability parameters revealed that there is lot of variation present among the genotypes studied. In general, the value of phenotypic coefficient of variation (PCV) was higher than the genotypic coefficient of variation (GCV) for all the characters studied in the present findings, indicating the considerable influence of environmental factors on the performance of genotypes for different characters. Phenotypic coefficient of variation (PCV) was higher than the genotypic coefficient of variation (GCV) for all the characters studied in the present findings, indicating the considerable influence of environmental factors on the performance of genotypes for different characters. Moderate to high GCV together with moderate to high heritability and genetic advance as per cent of mean was reported for majority of the characters. Thus these traits have ample scope for the improvement of concerned traits through selection.

Genetic variability for Yield and Yield Related Traits in Orange-fleshed Sweetpotato Genotypes Evaluated at Hawassa, Ethiopia

The study was conducted to determine variability for yield and yield related traits in 24 orange fleshed sweetpotato [<i>Ipomoea batatas</i> (L.) Lam] genotypes in the 2017 main cropping season at Hawassa Agricultural Research Center. The experiment was laid out in a Randomized Complete Block Design with three replications. Data were collected on 19 traits and analysis of variance (ANOVA) was conducted. Significant differences (p≤0.05) among genotypes were observed for root yield and its components as well as morphological and qualitative traits including sweetpotato virus disease reaction (SPVD). The phenotypic coefficient of variation (PCV) ranged from 22.1% for mature leaf size to 118.3% for unmarketable root yield, while the genotypic coefficient of variation (GCV) ranged from 20.6% for root girth to 111.7% for unmarketable root yield. All the traits studied showed PCV and GCV more than 20%, suggesting high variability and this could be used for the selection of superior genotypes concerning character of interest. Most traits showed high values for broad-sense heritability, which ranged from 66.7 to 100%, indicating low environmental influence in the observed variation. High heritability coupled with high genetic advances as a percent of mean was observed for marketable root yield, root skin color, root beta carotene content, harvest index, vine length, vine inter-node length and above ground fresh weight, implying these characters are governed by additive gene action and selection would be rewarding for the further improvement of such traits.

Genetic variability for yield and its component traits in grain and vegetable type soybean

Fourteen soybean genotypes including seven each of grain and vegetable types were evaluated for fourteen characters. Analysis of variance indicated significant differences among the genotypes for different traits. The phenotypic coefficient of variation (PCV) was higher than genotypic coefficient of variation (GCV). The high values of GCV and PCV observed for 100 seed weight, seed yield and harvest index. High heritability coupled with high genetic advance was observed for days to 50% flowering, days to maturity, plant height, number of branches, number of seed, green pod weight, 100 seed weight, seed yield and harvest index showed preponderance of additive gene effects in expression of these traits.

Genetic variability for yield and quality traits in local germplasm of rice of Himachal Pradesh

In present study estimates of heritability, genetic advance, phenotypic and genotypic coefficient of variation among yield, quality and its component characters for 19 traits in forty five genotypes of rice from different geographical origin were worked out in RBD design at Rice and Wheat Research Station, Malan during Kharif 2018 Analysis of variation showed significant differences among all the genotypes for all the traits suggesting prevalence of wide range of genetic variability and scope of selection for these traits. Estimates of variability revealed that plant height, total tillers/plant, effective tillers/plant, panicle length, grains/panicle, spikelets/panicle, L:B ratio ,GC and GT exhibited high to moderate heritability coupled with high to moderate genetic advance thus depicting these traits were controlled by additive gene effects thus selection for these traits will be effective Grain yield showed moderate heritability coupled with low PCV, GCV and genetic advance. Moderate PCV and GCV was observed for days to grains/panicle, spikelets/panicle and L:B ratio, which indicated the presence of additive gene action and sufficient variability scope for improvement through selection. Doi.org/10.25174/2582-2675/2020/'103761

Genetic variability for yield and yield attributing traits in F3 generation of blackgram

The present investigation was carried out in the F3 population of three black gram crosses viz., LBG-787 x LBG-752, TU-94-02 x KU-1006, and TU-94-02 x LBG-752 along with their parents. High PCV and GCV were recorded for plant height, the number of clusters per plant, the number of pods per plant and seed yield per plant in two crosses, LBG-787 x LBG-752 and TU-94-02 x KU-1006 indicating the existence of wide variability for these traits in the progenies of these crosses. High heritability coupled with high genetic advance as per cent of mean were recorded for plant height, the number of clusters per plant, the number of pods per cluster, the number of pods per plant and seed yield per plant in the cross LBG-787 x LBG-752 and for plant height, the number of branches per plant, the number of clusters per plant, the number of pods per cluster, the number of pods per plant and seed yield per plant in the cross TU-94-02 x KU-1006, respectively. This indicates the scope of selection for these traits in a particular population since there is a wide range of variation and additive gene action for the traits.

A study on genetic variability for yield and its attributes in sacred basil (&lt;em&gt;Ocimum tenuiflorum &lt;/em&gt;L.)

A study on genetic variability for yield and its attributes in sacred basil (&lt;em&gt;Ocimum tenuiflorum &lt;/em&gt;L.)

Genetic variability of yield and yield related traits in mungbean (Vigna radiata L. wilczek) Genotypes

Genetic variability of yield and yield related traits in mungbean (<i>Vigna radiata</i> L. wilczek) Genotypes

An assessment of genetic variability for drought tolerance in rice

The genetic variability for yield and yield contributing traits were studied in forty genotypes of rice under moisture-stress (rainfed) and moisture non-stress (irrigated) conditions. The results revealed highly significant differences among the genotypes for all the characters studied. This indicated the ample scope for selection of promising genotypes from the present set of genotypes for yield improvement. The high estimates of GCV and PCV coupled with high heritability and expected genetic advance for yield and important yield contributing traits showed their importance in selection for improving rice yield. The correlation study revealed that grain yield per plant had strong positive associations with effective panicle bearing tillers, days to 50% flowering, days to maturity, panicle weight, filled grains per panicle, total grains per panicle and length of main panicle. This indicated that grain yield of rice can be improved under both the environments having higher per se performances for the above traits. The genotypes such as HUR 105, NDR 359, Swarna were found to be best for yield and yield contributing traits. However, based on the different drought parameters, the varieties such as HUR105, HUR 4–3 and IET-20556 has been identified as drought tolerant which might be utilised in future breeding programmes.

English

English

English

English

Genetic variability for yield and yield components of Thai chilli (Capsicum spp.) landraces under inorganic and organic agricultural systems

Genetic variability for yield and yield components of Thai chilli (Capsicum spp.) landraces under inorganic and organic agricultural systems

Studies on genetic variability for yield and yield traits in rice (Oryza sativa L.)

Genetic variability in any crop is pre-requisite for selection of superior genotypes over the existing cultivars. In the Asia and Pacific region, rice is the main staple food and the most important source of employment and income for rural people. Knowledge of variability and heritability of yield and its contributing traits helps in the selection of appropriate strategy for a breeding programme for evolving superior varieties. Therefore, the present investigation was conducted to assess the variability present in F 1 hybrids and their parents for yield and yield contributing traits. In present study, Variance analysis for all the characters revealed significant variation among the genotypes studied, indicating the existence of sufficient amount of variability. The GCV, PCV, broad sense heritability and genetic advances as percent of mean suggested number of panicle bearing tillers per plant, spikelets fertility, plant height, panicle length, number of spikelets per panicle, test weight, and grain yield per plant were important contributing traits and selection based on these traits would be most effective.