Vol. 11, Issue 2 (2022)

Author(s):
Mukh Ram, Dan Singh Jakhar, Deshraj Gurjar, SP Singh, PK Singh and Nitesh Kumar

Abstract:
A diallel cross made among the nine rice genotypes to produce 36 F₁ (excluding reciprocals) during Kharif-2014 at Agricultural Research Farm, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi. All the 36 F₁’s and their parents were grown at Rajiv Gandhi South Campus, Barkachha, Mirzapur during Kharif 2015 under drought stress. Variety APO, Nagina-22, RAU-4, and RASI were the best general combiners for grain yield and other drought-related traits. Most of the crosses have shown the preponderance of non-additive gene effects for all the traits understudied. The ratio of dominance to recessive genes (K_d/K_r) was >1 for all the traits except for plant height, stay green and relative water content, indicating an excess of dominant genes in the parents. Over-dominance was observed for traits viz. no. of effective tillers/plant, test weight, spikelet fertility %, panicle length, harvest index, panicle weight, grain yield/ plant, relative water content, and chlorophyll content. Crosses APO x Sarjoo-52, RAU-4 × SARJOO-52, Nagina-22 × BPT-5204, RASI × MTU-7029, RAU-4 × SARJOO-52, Rajendra Bhagwati × SARJOO-52, BPT-5204 × MTU-7029, Rajendra Bhagwati × RAU-4, RASI × Nagina-22, and Rajendra Bhagwati × BPT-5204 were best specific combiner.