Mixed major genes plus polygenes inheritances for 4 yield-related traits in flax temperature sensitive male sterile lines

doi:10.7505/j.issn.1007-9084.2016.02.008

Abstract

Abstract:

To further understand flax temperature sensitive male sterile lines 1S and 113S, 2 crosses with Longya 10 (oil flax) and Heiya 15 (fiber flax) were used by constructing P1, P2, F1 and F2 populations for each cross. Their genetic foundations were investigated on 4 yield-related traits using mixed-major-genes-plus-polygenes inheritance model. Results indicated that yield per plant, capsules per plant and 1 000-seed weight were controlled by 2 major genes with additive-dominance-epistatic effects plus polygenes with additive-dominance effects. Seeds per capsule were controlled by 2 major genes with additive-dominance effects plus polygenes with additive-dominance effects in the 2 crosses. In F2 populations, the major gene heritability of yield per plant, capsules per plant and seeds per capsule in the 2 crosses were 43.50% to 73.28%, those of 1 000-seed weight were 10.55% to 34.40%. It indicated that additive, dominance and epistatic effects of major genes played important roles in yield inheritance in the flax temperature sensitive male sterile lines. To increase hybrid flax production, additive and dominant effects should be utilized in two-line heterosis breeding in flax.

Key words: Oil Flax, Male sterility, Mixed major genes plus polygenes, Genetic effects

WANG Li-min ZHANG Jian-ping, DAGN Zhao, DANG Zhan-hai* . Mixed major genes plus polygenes inheritances for 4 yield-related traits in flax temperature sensitive male sterile lines[J]. 中国油料作物学报, 2016, 38(2): 186-.

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