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

Year 2019, Volume: 24 Issue: 1, 98 - 105, 14.06.2019

Sedhom Abdelkhalık Ding Mınglıang Gu Jıan Li Hongsheng Armghan Shahzad Muhammad Asım Zhao Hong Yang Mujun

https://doi.org/10.17557/tjfc.571725

Cited By: 1

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 (CA) and 2) estimating heterosis effects. Two thermophoto-sensitive-genic-male-sterile lines (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 (G)/specific (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

Supporting Institution

The National Key Research and Development Program of China

Project Number

2016YFD0101603

Thanks

The financial support by The National Key Research and Development Program of China (2016YFD0101603) is gratefully acknowledged

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