ANALYZING COMBINING ABILITY AND HETEROSIS OF THERMOPHOTO SENSITIVE GENIC MALE STERILE WHEAT LINES FOR HYBRID DEVELOPMENT

Authors : Sedhom ABDELKHALIK, Ding MINGLIANG, Gu JIAN, Li HONGSHENG, Armghan SHAHZAD, Muhammad ASIM, Zhao HONG, Yang MUJUN

Pages : 98-105

Doi:10.17557/tjfc.571725

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Publication Date : 2019-06-14

Article Type : Research Paper

Abstract :This study was conducted to identify desirable wheat germplasm for superior hybrid cross combinations through 1); identifying the best parents with high combining ability insert ignore into journalissuearticles values(CA); and 2); estimating heterosis effects. Two thermophoto-sensitive-genic-male-sterile lines insert ignore into journalissuearticles values(K456s and K78s); as female parents and 60 restorer lines as males were crossed according to line × tester hybridization method. The observed variation for most of the nine studied characters and <1 ratio for general insert ignore into journalissuearticles values(G);/specific insert ignore into journalissuearticles values(S); CA suggested governance of non-additive gene action. The GCA for K456s was higher than K78s in six out of nine characters, while restorers 2016Y2-2776 and 2016Y2- 4117 had the highest in five characters. The crosses K78s/R31 and K456s/R2 had highest positive SCA values in five and six characters, respectively. The crosses K78s/R43 and K456s/R21 had the overall highest significant positive heterosis estimates for the best cross with respect to yield plant-1and has the potential for utilization in hybrid wheat breeding program. 
Keywords : Combining ability, heterosis, hybrid wheat, TPSGMS, traits improvement