谷子体细胞无性系变异及其在育种上的应用  

Somaclonal Variation of Foxtail Millet and Its Application in Breeding

作　　者：刁现民[1] 王鹏[1] 智慧[1] 陈振玲[1] 段胜军[1] 孙敬三[2] 

机构地区：[1]河北省农林科学院谷子研究所,河北石家庄050031 [2]中国科学院植物研究所,北京100093

出　　处：《作物学报》2002年第4期480-485,共6页Acta Agronomica Sinica

基　　金：河北省自然科学基金资助项目 (编号 3 0 0 3 0 0 )。

摘　　要：本研究对谷子 (Setaria italica Beauv.) 7个品种的体细胞无性系性状变异和遗传进行了分析。结果表明 :以 R2株系为计算单位的谷子体细胞无性系农艺性状变异频率平均为 13.0 % ,不同基因型的变幅为 4 .3%～ 32 .9% ;变异涉及株高、抽穗期、穗粒重、出谷率、育性、抗病性、米色等多个性状 ;R1 代表现半不育的植株 ,其 R2 代出现变异的机率高 ;变异的性状多数能在 R3代稳定并遗传给后代。本文对植物体细胞无性系变异频率的计算方法、体细胞无性系变异的育种应用等问题进行了讨论。Phenotypic variation and inheritance of somaclones among 7 genotypes of foxtail millet ( Setaria italica Beauv. ) were systematically studied in this paper. Based on the number of R 2 lines, the average frequency of somaclonal variation in foxtail millet is 13.0%, with a range of 4.3%~32.9%. The changed traits included plant height, heading date, grain weight per spike, percentage of grain weight per spike, male sterility, resistance to rust, color of hulled grain. Lines of R 2 generation derived from partially sterile R 1 plants gave a higher frequency of variation than those generated from the normal R 1 plants. Most of the variation are heritable and some of them could be used for cultivar improvement in breeding program. Some problems such as ways to calculate the frequency of somaclonal variation in R 2 generation and the breeding use of somaclonal variation were also discussed in this paper.

关 键 词：谷子 体细胞无性系 变异 育种 应用 

分 类 号：S515[农业科学—作物学]