Author(s):

Martina Shitiri, Kigwe Seyie and HP Chaturvedi

Abstract: The study was carried out to estimate different genetic parameters in rice bean landraces of Nagaland. Thirteen genotypes of rice bean were evaluated for yield and its components in the cropping seasons of 2016-2017 across six environments represented by different sowing dates. In each cropping season the genotypes were arranged in Randomized Block Design (RBD) with three sowing dates. The study revealed that phenotypic coefficient variation (PCV) was higher than genotypic coefficient of variation (GCV) for all the traits in all the six environments. High PCV and GCV was observed for number of pods per plant, number of seeds per pod, plant height,100 seed weight and seed yield/plant, indicating the role of these characters for effective selection. The study also revealed that heritability in broad sense was high for days to flowering, pod length, number of pods per plant, number of seeds per pod, plant height, 80% maturity and100 seed weight indicating that the variation observed was mostly under genetic control and less influenced by environment. Overall high to moderate heritability with high genetic advance was observed for pod length, number of seeds per pod and 100 seed weight indicating additive gene control of these traits across the six environments and thus there is better scope for improvement of these traits through direct selection. On the basis of mean performance of all the genotypes, RbnG1, RbnG3, RbnG4, Rbng5, RbnG8, RbnG10 and RbnG13 was found promising among all the genotypes. The genotype RbnG8 was observed to be earliest genotype among all the genotypes studied. The best environment studied was Env4 and Env6.

Pages: 470-473  |  906 Views  303 Downloads

Download (514KB)