Genetic study and selection indices for grain yield of mungbean

2016 ◽  
Author(s):  
P. Choudhary ◽  
S. K. Payasi ◽  
N. K. Patle
Keyword(s):  
Grain Yield ◽  
Selection Index ◽  
Yield Potential ◽  
Genetic Advance ◽  
Economic Weight ◽  
Selection Indices ◽  
Biological Yield ◽  
Additive Gene ◽  
High Heritability ◽  
Positive Direct

Mungbean (Vigna radiata L.) genotypes along with two parents were studied to assess the magnitude of genotypic variability, heritability and selection indices among the yield components and their direct and indirect effects on grain yield. On the basis of genetic variability, all the traits exhibited high heritability estimates coupled with high genetic advance as percent of mean (h2³ 60%, GAM³20 %) except 100 grain weight (h2 = 0.51, GAM= 8.0 %), indicating the preponderance of additive gene action. Biological yield/plant and harvest index had the most positive direct effects (1.448, 1.144, respectively) on grain yield/plant, indicating these traits synergistically affect photosyntates. Based on Smith-Hazel indices the highest genetic advance (17.56%) in grain yield/plant obtained on linear combination of traits such as days to 50% flowering, days to maturity, plant height, pod length, grains/pod and biological yield/plant (X2X3X4X7X8X10) accomplished through a completely new selection-index in which economic weight of each traits were equally distributed, suggesting that these parameters may be considered as prime traits during the course of selection to realize higher yield potential in green gram.

scholarly journals Genetic Evaluation and Correlation Analysis Among Various Quantitative Traits in Maize Single-Cross Hybrids Under Diverse Environments

2021 ◽  
Vol 13 (5) ◽  
pp. 104
Author(s):  
Fortunate Makore ◽  
Cosmos Magorokosho ◽  
Shorai Dari ◽  
Edmore Gasura ◽  
Upenyu Mazarura ◽  
...  
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Coefficient Of Variation ◽  
Strong Positive Correlation ◽  
Genetic Advance ◽  
Positive Correlation ◽  
Grain Moisture ◽  
High Heritability ◽  
Ear Height ◽  
Positive Direct

Genetic variation abundance, high genetic advance coupled with high heritability estimates presents the most suitable condition for selection. Ninety-five hybrids generated from elite and new inbred lines crossed using half diallel mating design were evaluated under diverse environments. The objectives were to estimate genetic variances, heritability of traits and genetic advance and to determine correlations of grain yield and its component characters in maize hybrids. Analysis of variance revealed significant differences among genotypes for all traits studied except for ear rots. Estimates of phenotypic coefficient of variation were slightly higher than genotypic coefficient of variation for all traits suggesting low influence of environment in the expression of these traits. High heritability and genetic estimates were recorded for grain yield (79%; 30.27%), plant height (85%; 102.42%) and ear height (86%; 117.15%) whilst high heritability and low genetic advance were observed for anthesis date (87%; 5.8%), texture (75%; 8%) and ear position (71%; 0.23%). Correlation between environments using grain yield data revealed existence of a very strong positive correlation between CIMMYT2 and RARS2 suggesting that the sites have the same discriminating effect. Correlation among traits revealed that grain yield had significant (P < 0.05) positive correlation with plant height and ear height. Similarly, plant height had significant and positive correlation with ear height while ear position was positively correlated to ear height. Path analysis showed that plant height, ears per plant and ear position had positive direct effects on grain, while anthesis date, ear height, ear position, grain moisture content at harvest and texture indirectly influenced grain yield. These characters’ contribution to grain yield is important and the strong association with grain yield implied that these can be used as secondary traits to indirectly select for grain yield performance in this set of germplasm across all the environments.

scholarly journals Genetic variability, correlation, path analysis and construction of selection index in mulberry silkworm, Bombyx mori L. I. Genetic variability

2012 ◽  
Vol 30 ◽  
pp. 33-36
Author(s):  
Md Ariful Hasan ◽  
Sawdagar Mahfuzar Rahman ◽  
Md Kamrul Ahsan
Keyword(s):  
Genetic Variability ◽  
Selection Index ◽  
Genetic Advance ◽  
Filament Length ◽  
Egg Hatching ◽  
Shell Weight ◽  
Gene Effects ◽  
Additive Gene ◽  
High Heritability ◽  
Mulberry Silkworm

The genotypic variability and heritability for nine quantitative characters in 65 varieties of silkworm, B. mori L. have been investigated. Variation among genotypes were highly significant (p<0.001) for all the characters indicating the existence of a real difference among the genotypes which are suitable for breeding purposes. The highest heritability was obtained for shell weight followed by filament size (FS), filament length (FL), expected cocoon yield out of 100 dfls (ECY), surviving percentage of larvae (SPL), cocoon weight (CW), egg hatching percentage (EHP) and mature larval weight (MLW). Comparatively high heritability accompanied by a genetic advance was recorded for FL and total number of eggs laid per female (TEL) indicating the importance of additive gene effects of these characters, but shell weight, cocoon weight and filament size showed high heritability and low genetic advance indicating the involvement of non-additive gene systems in the inheritance of these characters. So selection on the basis of these characters, with relatively more emphasis upon filament length and total number of eggs laid per female to obtain high yielding varieties of B. mori is suggested. DOI: http://dx.doi.org/10.3329/ujzru.v30i0.10744 Univ. j. zool. Rajshahi Univ. Vol. 30, 2011 pp.33-36

Association studies between quantitative and qualitative traits in rabi sorghum

2015 ◽  
Vol 49 (5) ◽  
Author(s):  
Rekha Chittapur ◽  
B. D. Biradar
Keyword(s):  
Grain Yield ◽  
Association Studies ◽  
Test Weight ◽  
Genetic Advance ◽  
Panicle Length ◽  
Gene Effects ◽  
Superior Genotype ◽  
Additive Gene ◽  
High Heritability ◽  
Panicle Weight

One hundred <italic>rabi</italic> sorghum germplasm lines of diverse origin were used to estimate genetic variability parameters such as heritability, genetic advance and correlation for 15 quantitative traits. The study was conducted under rainfed conditions during <italic>rabi</italic> season. High phenotypic coefficient of variation was observed for grain yield, panicle weight, panicle length, number of primaries and dead heart percentage. High heritability coupled with high genetic advance were observed for the characters days to flowering, dead heart percentage, panicle weight panicle length, number of primaries per panicle, test weight and grain yield per plant indicating that additive gene effects were operating for these traits and selection for superior genotype was possible to bring genetic improvement in desired direction. Grain yield had positive and highly significant association with plant height, panicle weight, number of primaries, panicle weight and test weight, whereas negative and highly significant correlation with seed fat content and protein content.

scholarly journals Genetic variability, correlation and path analysis for yield and its component traits in restorer lines of rice

2019 ◽  
Vol 44 (2) ◽  
pp. 291-301 ◽  
Author(s):  
MZ Islam ◽  
MAK Mian ◽  
NA Ivy ◽  
N Akter ◽  
MM Rahman
Keyword(s):  
Grain Yield ◽  
Leaf Area ◽  
Coefficient Of Variation ◽  
Environmental Influence ◽  
Flag Leaf ◽  
Positive Association ◽  
Spikelet Fertility ◽  
Genetic Advance ◽  
High Heritability ◽  
Positive Direct

Twenty nine restorer lines of rice were evaluated for fourteen agro-morphological traits during Boro (irrigated rice) season of 2012-2013 at Bangabandhu Sheikh Mujibur Rahman Agricultural University (BSMRAU), Gazipur, and Bangladesh. Analysis of variance revealed significant differences among the restorer lines for all the traits studied.The phenotypic coefficient of variation (PCV) was higher than genotypic coefficient of variation (GCV) for all the traits indicating the presence of little environmental influence in the phenotypic expression. Heritability estimate was found high for all the yield contributing traits. High heritability along with high genetic advance as per cent of mean was recorded for secondary branches per panicle followed by number of effective tillers, flag leaf area and panicle weight. Contrary, days to flowering and days to maturity showed high heritability coupled with low genetic advance as per cent of mean. Pearson correlation revealed grain yield had positive association with number of effective tillers per hill, panicle length, spikelet fertility, flag leaf area, plant height and thousand grain weights. Mentioned characters also found positive association with yield in both genotypic and phenotypic level. Spikelet fertility, number of secondary branches per panicle, thousand grain weights and number of effective tiller possessed higher positive direct effect on grain yield. It indicated the importance of these traits as selection criteria of yield improvement in hybrid rice programme. Bangladesh J. Agril. Res. 44(2): 291-301, June 2019

scholarly journals Genetic variation and characterization of different linseed genotypes (Linum usitatissimum L.) for agro-morphological traits

2017 ◽  
Vol 9 (2) ◽  
pp. 754-762
Author(s):  
Satish Paul ◽  
Nimit Kumar ◽  
Pankaj Chopra
Keyword(s):  
Seed Yield ◽  
Harvest Index ◽  
Crop Improvement ◽  
Genetic Advance ◽  
Linum Usitatissimum L ◽  
Biological Yield ◽  
Additive Gene ◽  
High Heritability ◽  
Apparent Variation

Forty five linseed genotypes (local collection) were subjected to study the genetic variability at the Experimental Farm of the Department of Crop Improvement, CSK Himachal Pradesh KrishiVishvavidyalaya, Palampur, during rabi 2015-2016. Analysis of variance revealed that the differences among all the genotypes were significant for all the traits. Mean performance of genotype KLSA-15 for seed yield recorded highest contribution of 3.69 grams. The PCV values were greater than the GCV values for all the traits studied indicating that the apparent variation is not only due to genotypes but, also due to the influence of environment. The highest PCV (64.17) and GCV (64.09) were found for biological yield per plant. Higher estimates of PCV and GCV were obtained for primary branches per plant, secondary branches per plant, capsules per plant, biological yield per plant, harvest index (45.94 and 44.60) and seed yield per plant (52.39 and 50.94). All the characters studied in the present investigation expressed high heritability estimates ranging from 62.95 to 99.77 percent for technical height and biological yield per plant respectively. It was revealed that most of the traits under study showed low genetic advance, high heritability (94.23) and high genetic advance (31.06) was recorded for harvest index indicating predominance of additive gene action for this character. Simple selection based on phenotypic performance of this character would be more effective. The cluster analysis showed that the genotypes were placed into four clusters, showing inter-cluster divergence, which is important for future hybridization programme.

scholarly journals Evaluating Adaptability and Genetic Variability of Improved Maize Varieties

2021 ◽  
Vol 8 (5) ◽  
Author(s):  
Abenezer Abebe ◽  
Zelalem Tafa ◽  
Worknesh Terefe
Keyword(s):  
Grain Yield ◽  
Gene Action ◽  
Female Flower ◽  
Genetic Advance ◽  
Additive Gene Action ◽  
Maize Varieties ◽  
Significant Difference ◽  
Maize Variety ◽  
Additive Gene ◽  
High Heritability

Maize is one of the most important cereals broadly adapted worldwide. Though, a number of improved maize varieties have been released, each micro-environment has not been touched that is why the study carried out. The experiment was conducted using seven maize varieties in RCB design with three replications. The analysis of variance signifies the presence of significant difference (p<0.05) among the seven maize varieties evaluated. High value of genetic (GCV) and phenotypic coefficient of variation (PCV) for grain yield (25.1 and 37.8%) were estimated and this infers less influence of environment. Additionally, moderately high heritability (44.2%) and high genetic advance in percent mean (34.4%) were estimated for grain yield which indicate the trait governed by additive gene action and could be improved via selection based on phenotypic performance. However, traits (male and female flower) with high heritability and moderate genetic advance in percent mean inherited mostly by non-additive gene action and heterosis breeding could be useful. Regarding agronomic performance, Hora maize variety provided highest grain yield (5.0 t/ha) followed by Kuleni (4.1 t/ha), Melkasa 2 (4.0 t/ha) and check (4.0 t/ha). Hora, Melkasa 2, Melkasa 4 and check flowered earlier as compared to the other and could be used as parent for generating early flowering varieties. In summary, Hora maize variety was better performing both statistically and in eyes of farmers and need seed multiplication and distribution to farming community. Moreover, the variability observed among the maize varieties could be utilizing in future breeding activities.

scholarly journals Line × tester Study in Bread Wheat (Triticum aestivum L.) for Important Biochemical and Morphological Traits

2022 ◽  
Author(s):  
Anand Kumar ◽  
Lokendra Singh ◽  
Prashant Kaushik
Keyword(s):  
Grain Yield ◽  
Harvest Index ◽  
Morphological Traits ◽  
Triticum Aestivum L ◽  
Genetic Advance ◽  
Biochemical Traits ◽  
Days To Maturity ◽  
Biological Yield ◽  
High Heritability ◽  
F1 Generation

: Using line × tester analysis, the current research analyses parental genotypes and their combinations in normal conditions and identifies the genes influencing yield characteristics. In the present study, 15 diverse genotypes, including 10 lines, 5 testers, and 50 F1s hybrids, were evaluated for 13 morphological and 2 biochemical traits. A suitable location was taken to study the effect of 15 characters. The results exposed that ability mean squares were significant for all studied additive and non-additive components. In this direction, the general combining ability of PBW-343, DBW-39, K-402, K-1317, KRL-210, and K-68 were higher than the remaining parents. For morphological traits like yield, the top five crosses were described based on SCA effects, namely, HD-3086 × HD-3171, K-402 × K-9107, K-1317 × K-9107, HD-2967 × K-0307 and K-402 × K-68 in F1 generation. In addition, the high value of heritability was estimated for plant height (77.32%), spike length (32.26%), biological yield/plant (59.52%), and grain yield/plant (68.76%). However, the moderate values of heritability were estimated for days to maturity (22.78%) and phenol color reaction (18.00%). The higher genetic advance was not found for recorded characters; however, a moderate genetic advance was recorded for grain yield per plant (13.15%) and harvest index (11.72%). High heritability coupled with moderate genetic advance was recorded for two characters grain yield per plant and harvest index in F1 and F2 generations.

Character association and path coefficient analysis in wheat (Triticum aestivum L.)

2017 ◽  
Vol 51 (03) ◽  
Author(s):  
Vichitra Kumar Arya ◽  
Jogendra Singh ◽  
Lokendra Kumar ◽  
Amit Kumar Sharma ◽  
Rajendra Kumar ◽  
...  
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Harvest Index ◽  
Indirect Selection ◽  
Grain Weight ◽  
Genetic Advance ◽  
Biological Yield ◽  
Positive Direct ◽  
1000 Grain Weight ◽  
Plant Plant

<span>Forty nine genotypes of wheat were evaluated for 12 quantitative and one quality traits during 2010-11. The experiment was conducted in randomized complete block design with three replications at Crop Research Centre, Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut. The mean, range, genotypic and phenotypic coefficient of variation, heritability in broad sense, genetic advance correlation and path analysis were analyzed. Plant height, number of productive tillers per plant, spike length, 1000-grain weight, biological yield per plant and harvest index were significant and positive correlated with grain yield per plant. The phenotypic and genotypic path coefficients exhibited high positive direct contribution of number of productive tillers per plant, plant height, harvest index and 1000-grain weight towards grain yield.The positive indirect effect of plant height on grain yield was registered via days to maturity, number of spikelets per spike, 1000-grain weight and biological yield per plant. Number of productive tillers per plant revealed contribution on grain yield via number of grains per spike, 1000 grain weight, biological yield per plant and harvest index revealing that indirect selection of these characters would be effective in improving grain yield per plant. Higher genotypic coefficient of variance along with high heritability and genetic advance for grain yield per plant, plant height, number of spikelets per spike, number of grains per spike and 1000-grain weight would also be of great use for indirect selection for improvement in yield per plant. </span>

scholarly journals GENETIC DIVERSITY, CHARACTER ASSOCIATION AND PATH COEFFICIENT ANALYSIS OF EXOTIC RICE GENOTYPES (Oryza sativa L.)

2012 ◽  
Vol 25 (1) ◽  
pp. 25-29
Author(s):  
A. A. Mamun ◽  
N. A. Ivy ◽  
M. G. Rasul ◽  
M. A. K. Mian ◽  
M. M. Hossain
Keyword(s):  
Grain Yield ◽  
Oryza Sativa L ◽  
Path Coefficient ◽  
Genetic Advance ◽  
Gene Effects ◽  
Grain Length ◽  
Additive Gene ◽  
High Heritability ◽  
Rice Genotypes ◽  
Selection For

Fifty exotic rice genotypes along with two check varieties were studied to measure the variability among the genotypes for yield and yield contributing characters, estimate genetic parameters, association among the characters and their contribution to yield. High genotypic co-efficient of variation (GCV) was observed for days to 50% flowering, days to first flowering and spikelet sterility whereas low genotypic co-efficient of variation (GCV) was observed for grain length and filled grains per panicle. High heritability with high genetic advance in percent of mean was observed for days to 50% flowering and pollen sterility indicated that this trait was under additive gene control and selection for genetic improvement for this trait would be effective. On the other hand, high heritability with low genetic advance in percent of mean was observed in days to harvesting and grain length which indicated that non-additive gene effects were involved for the expression of this character and selection for such trait might not be rewarding. Correlation studies revealed that highest significant positive association of grain yield was with days to first flowering, days to harvesting, filled grains per panicle followed by grain length at genotypic and phenotypic level. Path co-efficient analysis revealed that maximum direct contribution towards grain yield with days to harvesting followed by filled grains per panicle.DOI: http://dx.doi.org/10.3329/bjpbg.v25i1.17009

scholarly journals Variability, Correlation and Path Analysis in F2 Progenies of Inter-Varietal Crosses of Brassica Rapa

2015 ◽  
Vol 6 (1) ◽  
pp. 217-220
Author(s):  
S Ara ◽  
S Afroz ◽  
MS Noman ◽  
MSR Bhuiyan ◽  
MIK Zia
Keyword(s):  
Plant Height ◽  
Brassica Rapa ◽  
Seed Yield ◽  
Yield Potential ◽  
Genetic Advance ◽  
High Heritability ◽  
Correlation And Path Analysis ◽  
Positive Direct ◽  
Number Of Branches ◽  
Plant Length

Eight F2 populations generated through inter-varietal crosses, along with three check varieties of Brassica rapa were evaluated to study the variation in different characters, correlation between pairs of different characters and the direct and indirect effect of different characters on seed yield per plant to select the plants with higher yield potential. From the values of mean, range and (CV%) of seed yield and yield contributing characters it was confirmed that there were considerable variation present among all the genotypes used in the experiment. The values of phenotypic variances were higher than the cor responding genotypic variances. Number of branches per plant, length of siliqua, seeds per siliqua, 1000 seed weight and yield per plant showed least difference between phenotypic and genotypic variances. The values of GCV and PCV indicated that there was least variation present among most of the characters studied. The number of branches per plant, days to 50% flowering, days to maturity and length of siliqua had showed high heritability with low genetic advance and genetic advance in percentage of mean. Yield per plant had significant and highest positive correlation with plant height, days to 50% maturity, length of siliqua and seeds per siliqua. The path co-efficient analysis revealed that siliqua per plant had the highest positive direct effect followed by seeds per siliqua, length of siliqua and plant height. Sixteen most promising plants with higher yield were selected for cultivation.DOI: http://dx.doi.org/10.3329/jesnr.v6i1.22068 J. Environ. Sci. & Natural Resources, 6(1): 217-220 2013

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