非1B/1R和1B/1R类型小麦K型雄性不育系穗长和小穗数性状的遗传分析

Genetic Analysis on Spike Length and Spikelet Number of Non 1B/1R and 1B/1R K Type Wheat Male Sterile Lines

为明确非1B/1R和1B/1R类型小麦K型雄性不育系穗长和小穗数的遗传规律,利用非1B/1R类型KTSP732A和1B/1R类型K3314A两种K型不育系材料,采用主基因+多基因混合遗传模型分析法,对穗长和小穗数两类性状进行单世代和多世代混合分离分析。结果显示,非1B/1R类型KTSP732A和1B/1R类型K3314A穗长性状均符合加性-显性-上位性多基因模型(C-0),无主基因存在;非1B/1R类型KTSP732A的小穗数性状符合两对等显性主基因+加性-显性多基因混合模型(E-6),主基因遗传率为40.7%;而1B/1R类型K3314A的控制小穗数性状基因类型与非1B/1R不同,该类型无主基因存在,也符合加性-显性-上位性多基因模型(C-0)。

To make certain of the inheritance of spike length and spikelet number, the study used two K type male sterile materials of non 1B/1R KTSP732A and 1B/1R K3314A, and took the major gene plus polygene mixed inheritance model made by Gai Jun-yi to analyze the characters of ear length and spikelet number of non 1B/1R and 1B/1R K type on single generation and multi-generation. The result showed that the character of ear length of non 1B/1R and 1B/1R K type all fit with the polygene models（C-0） of additive-dominant-epistatic, no existence of the major gene, the character of spikelet number of non 1B/1R fit with the model （E-6） of two equal dominant major genes ＋ additive-dominant polygene mixed, the genetic rate of major gene was 40.7%. In the aspect of controlling the spikelet number, 1B/1R was different from non 1B/1R, and it had no major gene and also fit with the polygene models（C-0） of additive-dominant-epistatic.