摘要
[目的]了解四川地区小麦品种(系)的矮秆基因分布情况,以及不同矮秆基因聚合对小麦株高、穗长和节间长度的影响.[方法]以211份小麦品种(系)为材料,于2022-2023年和2023-2024年在田间调查株高、穗长和节间长度,并利用分子标记检测了矮秆基因Rht-B1b、Rht-D1b、Rht5、Rht8、Rht9、Rht10、Rht12和Rht13.[结果]在211份材料中携带 Rht-B1b、Rht-D1b、Rht5、Rht8、Rht9、Rht12 和 Rht13 的材料分布频率分别为 81.0％、95.7％、28.4％、51.2％、29.4％、19.9％和8.1％,所有材料均未检测到Rht10,共得到43个不同基因的组合.矮秆基因降秆效应为Rht9＞Rht5＞Rht12＞Rht8＞Rht13,推广品种和后备品系的株高矮化效应为9.8％和9.3％,两者均为第4节(基部第2节)节间矮化效应值最大,分别为22.27％和25.91％.[结论]四川地区小麦中矮秆基因应用最广泛的是Rht-B1b、Rht-D1b和Rht8,另外,Rht5、Rht9和Rht12的应用正在提高.
Abstract
[Objective]This study investigates the distribution of dwarf genes in wheat varieties(lines)in Sichuan,and assesses the effects of dwarf genes aggregation on plant height,spike length and inter-node length in wheat.[Method]The plant height,spike length and internode length of 211 wheat variet-ies(lines)were measured during the 2022-2023 and 2023-2024 growing seasons.Dwarf genes Rht-B1b,Rht-D1b,Rht5,Rht8,Rht9,Rht10,Rht12,and Rht13 were identified using molecular markers.[Result]The distribution frequencies of Rht-B1b,Rht-D1b,Rht5,Rht8,Rht9,Rht12,and Rht13 among the 211 materials were 81.0％,95.7％,28.4％,51.2％,29.4％,19.9％,and 8.1％,respectively.Rht10 was not detected in any of the materials.A total of 43 different gene combinations were identified.The ranking of culm reduction effects of the dwarf genes was Rht9＞Rht5＞Rht12＞Rht8＞Rht13.The height dwarfization effect of promoted varieties and reserve lines was 9.8％and 9.3％,respectively.The inter-node dwarfization effect value of section 4(base section 2)was 22.27％and 25.91％,respectively.[Con-clusion]The most widely used dwarf genes in wheat in the Sichuan area are Rht-B1b,Rht-D1b and Rht8,and the applications of Rht5,Rht9 and Rht12 are increasing.
维普
万方数据