Somaclonal Variation of Foxtail Millet and Its Application in Breeding
DIAO Xian Min 1 WANG Peng 1 ZHI Hui 1 CHEN Zhen Ling 1 DUAN Sheng Jun 1 SUN Jing San 2( 1 Institute of Millet Crops, Hebei Academy of Agricultural and Forestry Sciences, Shijiazhuang 050031, China; 2Institute of Botany, Chinese Acade
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.