一种小麦蓝粒标记单体代换系4E(6B)的创制

Development of a Blue-grained Wheat 4E(6B) Monosomic Substitution Line

为探索利用长穗偃麦草4E染色体代换方法快速创制具有蓝粒标记性状的小麦单体系统,本试验以中国春6B单体和小麦-长穗偃麦草4E二体异附加系为材料,通过杂交、回交结合染色体鉴定等方法培育出具有蓝粒标记的小麦单体代换系4E(6B)。该蓝粒标记小麦单体代换系籽粒为浅蓝色,能够正常生长结实,其自交后代可分离出27.8%的深蓝籽粒小麦4E(6B)二体代换系、66.7%的浅蓝籽粒小麦4E(6B)单体代换系和5.5%的白粒小麦6B缺体,表明长穗偃麦草4E染色体对小麦6B染色体的缺失具有一定的补偿功能。

To establish a shortcut method of developing blue-grained wheat monosomic system,a blue-grained wheat 4E(6B) momosomic substitution line was developed from the hybrid of Chinese Spring monosomic 6B and Triticum aestivum-Agropyro elongtum 4E addition line.This blue-grained wheat 4E(6B) monosomic substitution line was growing normally and fertility.Three types of seeds were separated from the selfing offspring of 4E(6B) monosomic substitution line.Deep blue-grained,accouting for 27.8%,was 4E(6B) disomic subst...