Vol. 11, Issue 1 (2022)

Author(s):
Omprakash and Jai Prakash Lal

Abstract:
An experiment was conducted in rice during 2017-18 using six generations of two crosses i.e. Azucena x BPT-5204 and Azucena x NDR-359 in two environments namely irrigated and rainfed conditions to investigate the various gene action for different yield and drought related traits through generation mean analysis. During the investigation, scaling test revealed the presence of epistasis for most of the traits under study in both the environments for both crosses. Hence, six parameter model was adopted in the presence of epistasis and three parameter model was used in the absence of epistasis for few traits under both the environments. The obtained results revealed the pre preponderance of non allelic interaction along with dominance gene effect on the expression of majority of the traits under study suggesting the postponement of the selection until fixation of higher amount of additive effect. Duplicate epistasis was reported for most of the traits suggesting that epistasis has a key role in the expression of the yield and drought related traits in present study.