Genetic Analysis of Spike Traits in Wheat Cultivated in Contrasted Water Conditions in Wheat

doi:10.7668/hbnxb.2015.S1.026

Abstract

Abstract: To study the difference of spike traits between well watered and drought conditions,a BC population derived from a cross between drought-resistance wheat variety and high fertilizer variety,was evaluated cultivated under well watered and drought stress conditions.Based on the segregation analysis of mixed inheritance model with major genes plus polygenes,the genetic coefficients of nine spike traits were obtained.The results showed that significant transgressive separation existed among all traits of population,distribution of positive skewness were unimodal and skewness peak,conformed to normal distribution,showed the genetic characteristics of quantitative traits,under the conditions of both well-irrigated and drought stress.The traits of ear length,ineffective spike number,compactness and awn length were controlled by two pairs of major genes,the traits of effective spikelet per spike,grain number per spike,grains per spike,number of spikelets and 1000-grain weight were controlled by one pairs of major gene.Under drought stress,the traits including ear length,effective spikelet per spike,grain number per spike,compactness and awn length,had high main gene heritability of 88%,73%,64%,67% and 95%.Awn length in the high coefficient of variation was 41%.So there might be the main gene and polygenic control performance.

Key words: Wheat drought resistance, Spike traits, Major gene, Genetic analysis

CLC Number:

S512.03

CHENG Jie, ZHOU Rong-quan, WU Yu-chuan, SONG Xin-ying, LIN Qi, MU Ping. Genetic Analysis of Spike Traits in Wheat Cultivated in Contrasted Water Conditions in Wheat[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2015, 30(S1): 146-151. doi: 10.7668/hbnxb.2015.S1.026.

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