谷子体细胞无性系变异及其在育种上的应用

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

Somaclonal Variation of Foxtail Millet and Its Application in Breeding

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.