Genetic variability, heritability, genetic advance and character association studies in F3 generation of cross JK8 x Peddasame (purple late) in little millet (Panicum miliare L.)

Abstract

Genetic variability, correlation and path analysis was carried out for yield and yield components in 542 F 3 progeny lines developed by crossing JK8 x Peddasame (purple late) in little millet during Kharif 2015. Seven biometrical characters were studied for estimating genotypic coefficient of variation (GCV), phenotypic coefficient of variation (PCV), genetic advance, heritability (broad sense), genetic advance as per cent of mean, correlation coefficient and path coefficient among themselves. High GCV and PCV were observed for number of productive tillers per plant and per plant yield. High heritability was observed for plant height and 1000 seed weight. Number of productive tillers per plant showed maximum genetic advance as per cent of mean followed by grain yield per plant, panicle length and plant height. High heritability coupled with moderate genetic advance as per cent of mean were observed for plant height and 1000 seed weight. Grain yield per plant possessed significant positive correlation with plant height, panicle length, number of productive tillers per plant and 1000 seed weight. Number of productive tillers per plant imparted maximum direct effect on grain yield followed by panicle length, 1000 seed weight and plant height.

Genetic variability and association analysis in the segregating population of extra early barnyard millet [Echinochloa frumentaceae (Roxb.) Link] involved crosses

“…GAM of days to maturity, the number of nodes and the length of peduncle were moderate. They were similar to the results of Nandini et al (2016) of nodes. In cross II, all the traits revealed high heritability and moderate GAM was indicated by days to flowering and maturity, correspondent to the sequels of Nandini et al (2016) for days to maturity and length of inflorescence as described by Anil kumar et al (2019).…”

“…In both the crosses, high PCV and GCV was recorded for the width of flag leaf, length of lower racemes, the number of racemes and grain yield per plant (Table 2) which is similar to the results of Nandini et al (2016) in the F 3 generation of little millet, Shet et al (2009) were found for days to flowering in cross II. In both the crosses studied, the difference between PCV and GCV is low for all the traits, which unfolds the negligible effect of the environment and the resistance of these traits to the environmental alterations (More et al, 2019) Heritability in conjunction with genetic advance provides an outlook of gain under selection.…”

“…The outcome of genetic advance relies on the estimates of variability, heritability and selection intensity of the population . High heritability was found for the traits such as, plant height, days to flowering, days to maturity, the number of basal tillers, stem diameter, length of flag leaf, the width of flag leaf, length of inflorescence, the width of inflorescence, length of the lower raceme, the number of racemes, single ear head weight and grain yield per plant in cross I which are in agreement with Renganathan et al (2018) Moderate heritability shows that the additive gene effect operates, which can be improved by mass selection (Nandini et al, 2016). Genetic advance as per cent of the mean (GAM) was high for all the traits, which coincides with Nandini et al (2010) Shanmuganathan (2010.…”

“…of flag leaf and length of inflorescence, identical to the reports ofNandini et al (2016),Shanmuganathan (2010), Anil kumar et al (2019, for both PCV and GCV and to exclusively in PCV, for the trait, inflorescence length. Moderate PCV and GCV meant the occurrence of notable variation for the above traits in the present segregating population.…”

“…In both the crosses, correlation studies indicated a positive significant correlation of grain yield per plant with plant height, days to flowering, days to maturity, the number of nodes, the number of basal tillers, stem diameter and single ear head weight. Renganathan et al (2017) reported a similar association in F 2 population and germplasm of barnyard millet, Nandini et al (2016) in F 3 population of little millet, Nandini et al (2010) in F 2 population of finger millet, in the F 2 generation of sorghum. Thus, indirect selection relying on the above characters can help in identifying the high yielding lines in the population.…”