Trait Associations and Path Coefficient Analysis for Seed Yield and Morphological Characters in Greengram (Vigna radiata (L.) Wilczek.)

Abstract

Genetic variability, heritability along with genetic advance of traits, their association and direct and indirect effects on yield are essential for crop improvement. One hundred and three greengram genotypes were studied to assess variability and degree to which various plant traits associate with seed yield. Sufficient genetic variability was observed for plant height, pods per plant and seed yield. Number of primary branches per plant, number of clusters per plant and pod length showed lesser variability while 100 seed weight and harvest index exhibited intermediate range of variability. Moderate to high heritability estimates were found for all traits. Number of primary branches per plant, pod length and 100-seed weight exhibited negative and non significant genotypic and phenotypic correlations with seed yield. Plant height showed positive non-significant genotypic and significant phenotypic correlation. Number of clusters per plant, number of pods per plant and harvest index showed positive significant genotypic and phenotypic correlations with seed yield. Positive direct effects were exerted through number of pods per plant, pod length, 100 seed weight and harvest index while number of primary branches per plant, plant height and number of clusters per plant had negative direct effects. The present findings could be useful for establishing selection criteria for high seed yield in the greengram breeding.

Genetic Parameters for Determining Useful Parents in Mungbean (Vigna radiata (L.) Wilczek) Breeding for Early Maturity, Small Seed Size, and High Seed Yield

“…For example, parent Sampeong (G3) exhibited positive and significant GCA effect and had high mean value for seed yield per plant, number of branches per plant, number of clusters per plant, and number of pods per plant. ese findings agreed with the reports of Zubair et al [16] and Latha et al [17].…”

“…e significant mean squares of GCA and SCA indicated the importance of the effects of additive and dominant genes, while pod length was only significant for SCA, indicating the importance of the influence of nonadditive genes. e significant effects of general combining ability and specific combining ability on mungbean for plant height, number of pods, days to maturity, seed yield, and weight of 100 seeds were also reported by [5,6,16,17].…”

Elucidation of Nature of Gene Action and Combining Ability Associated with Economic Traits in Greengram [Vigna radiata (L.) Wilczek]

“…and Viraj et al (2020). On contrary,Latha et al (2018) reported comparatively higher additive variance for branches per plant andNath et al (2018) for days to 50% flowering, primary branches, clusters per plant and seed yield/plant in greengram.…”

Genetics of qualitative and quantitative traits in crosses involving cherry and purple tomato genotypes

“…When a cross for any trait has a negative sign for "h," it means that the parents with the alleles that cause the characteristics' low values contributed to the dominating effects. Therefore, when desirable segregants become available, selection for these features should likewise be postponed until a later generation (Latha et al 2018).…”