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Greengram (Vigna radiata (L.) Wilczek) is one of the highly consumed legumes and has the ability to withstand wide environmental conditions. Sixty greengram genotypes were evaluated for genetic relatedness with 11 quantitative traits viz., days to 50 per cent flowering, days to maturity, plant height, the number of primary branches per plant, the number of clusters per plant, the number of pods per cluster, the number of pods per plant, the number of seeds per pod, pod length, hundred seed weight and single plant yield. The data were subjected to variability, genetic advance, heritability, correlation and path analysis. In this study, the phenotypic coefficient of variation and genotypic coefficient of variation was found to be high for the number of clusters per pod and the number of pods per plant. High heritability was noticed for single plant yield, plant height and hundred seed weight. The genetic advance was found to be very high for the number of pods per plant. Association studies revealed that the single plant yield was significantly correlated with the number of pods per plant (0.75) followed by the number of pods per cluster (0.60), the number of clusters per plant (0.58) and the number of seeds per pod (0.49). The direct and positive effect was recorded for the traits viz., days to maturity (1.44), the number of pods per cluster (0.67), pod length (0.46) and plant height (0.24). Phenotypic selection of traits contributing to grain yield exhibiting high heritability and genetic advance would help in the selection of superior genotypes for the improvement of grain yield in greengram. [ABSTRACT FROM AUTHOR]

The present investigation was conducted to explore the genetic variability, character association and path analysis for yield and yield component traits in maize. One hundred maize inbred lines obtained from Department of millets,TNAU were raised along with five checks in Augmented block design II and observations were recorded on twenty morphological traits. Analysis of variance showed significant genotypic variance for all the characters. High PCV, GCV heritability and genetic advance as percentage of mean were recorded for anthesis silking interval, number of tassel branches, number of kernels per row, grain yield per plant, cob weight, ear height and number kernel rows per cob. This indicated the effectiveness of selection towards these traits. Critical analysis of results obtained from character association indicated that grain yield per plant had positive significant association with cob weight, cob girth, number of kernels per row plant height, cob length, ear height, 100 kernel weight, tassel length and chlorophyll index. Thus selection for these traits could bring about an improvement in yield attributes of maize. Path analysis for the attributed traits revealed the direct influence of cob girth followed by number of kernels per row, shelling percentage, days to 50 percent silking and ear height on grain yield. Hence these traits could be used as an effective selection indicator to identify the elite genotypes from a population. [ABSTRACT FROM AUTHOR]

The F2 segregating generation of two crosses viz., CO 52 × CR Dhan 310 and RNR 15048 × CB 13543 were evaluated for variability parameters, character association and path coefficient analysis. The results revealed that both the crosses exhibited high GCV and PCV for the traits viz., number of productive tillers per plant, number of filled grains per panicle and single plant yield. The traits viz., number of productive tillers per plant, number of filled grains per panicle, hundred grain weight and single plant yield showed high heritability coupled with high genetic advance indicating the presence of additive gene effect and selection for these traits may be effective. Correlation studies revealed that plant height, number of productive tillers and panicle length had significant positive association with single plant yield in both crosses. Number of productive tillers per plant showed high positive direct effect on grain yield. Path analysis revealed that number of productive tillers per plant showed high positive direct effect on grain yield. [ABSTRACT FROM AUTHOR]

Barnyard millet is one of the hardiest, climate resilient and fast growing crop that is bestowed with high nutrient content in grains. An experiment was carried out in barnyard millet under natural sodic soil condition to study the genetic variability and association for different morphological and yield contributing traits. Ninety nine barnyard millet genotypes including two commercial check varieties viz., MDU1 and CO (KV) 2 were evaluated under sodic soil condition. Analysis of variance revealed significant variation for all the characters studied. High phenotypic coefficient of variation, genotypic coefficient of variation and heritability were recorded for plant height, ear width, lower raceme length, flag leaf length, flag leaf width and grain yield per plant. Association studies indicated that grain yield per plant had highly significant positive correlation with days to fifty percent flowering, days to maturity, ear width and thousand grain weight. Path coefficient analysis indicated that the highest direct and indirect effect on grain yield per plant was exhibited by days to fifty percent flowering. Thus, days to fifty percent flowering, days to maturity, ear width and thousand grain weight can be used as selection indices for increasing grain yield of barnyard millet in sodic soil. [ABSTRACT FROM AUTHOR]