Exploring the impacts of combining ability of rapeseed (Brassica napus L.) cultivars for agro-morphological characters in water deficit environments

A primary challenge to producing numerous field crops, especially in Brassica napus L. (B.napus L.) is the water deficit.The aim of the study is to develop high yield and oil cultivars in water deficit conditions.Nevertheless, genetic analysis is essential to produce high-yielding crop varieties for adverse conditions, such as combining ability.Hence, an experiment was conducted to identify the best water stress tolerant and high yielding genotypes through genetic analysis.In this context, six high yielding water stress resistant rapeseed cultivars and their respective 15 F1 hybrids were sown for further genetic evaluation of General Combining Ability & Specific Combining Ability under water stress conditions.Total two treatments were set, 1 st treatment is normal having (four irrigations; at vegetative, blooming, pods development & maturity) whereas the 2 nd treatment is water deficit at pods development having (two irrigations; at vegetative and blooming).The GCA and SCA variances were substantial for various characteristics investigated, containing seed yield per plant under both environments, displaying the maximum attributes that were regulated by both additive and non-additive genes.Three cultivars: Rainbow, Rohi Sarson and NARC Sarson found exceptional for GCA impact on majority of the characters investigated.The above three genotypes may demonstrate to be tremendous improvements for rapeseed crops, in particular water deficit environment.Whereas the excellent results of hybrids for SCA recorded by Con-1R.Sarson, Hyola-401Rainbow and RainbowR.Sarson in normal and water deficit environments for all the studied parameters.In the future, society and scientific communities could benefit from these water-resistant genotypes in potential breeding programs.