小麦抽穗期QTL及其与环境的互作

为筛选稳定表达的小麦抽穗期QTL用于辅助选择,以旱选10号×鲁麦14的DH群体为试材,在四种环境下对抽穗期进行QTL。结果表明,该DH群体抽穗期呈连续性分布,表现为多基因控制的数量性状。四种环境下共检测到6个抽穗期加性QTLs,分别位于1B、1D、4D、6B、7B、7D染色体上,LOD值为3.13~10.88,贡献率在1.57%~6.72%之间,其中QHd-1D-1和QHd-7B与环境具有互作效应。共检测到10对上位性QTL位点,互作效应值为-0.39~0.423,表型贡献率在1.39%~4.86%之间,其中4对上位性位点与环境具有互作效应。

Analysis of QTL for Heading Date and InteractionEffects with Environments in Wheat

A doubled haploid (DH) population derived from a cross of the wheat cultivars Hanxuan 10 and Lumai 14 was used for QTL analysis for heading date under four environments, in order to screen QTLs that can be stably expressed in different environments. A total of six additive QTLs for heading date were detected on chromosome 1B, 1D, 4D ,6B, 7B and 7D, respectively, with LOD score from 3.13 to 10.88 and phenotypic variation ranging from 1.57 to 6.72%. Of the QTLs detected, QHd 1D 1 and QHd 7B had interactions with environments. Ten pairs of epistatic QTLs were identified. These epistatic QTL explained phenotypic variations ranging from 1.39 to 4.86% and had epistatic effects ranging from -0.39 to 0.423. Of epistatic QTL , four pairs had interactions with environments.