Studies on the sterility of stable CMS LINE 991A in Brassic napus
991A is a new stable CMS line in B.napus,bred by successive directional selection. Its sterility is stable from initial flower date to final flower date,whether in low temperature of below 10℃ or in higher temperature condition at Changsha in the spring of 2001-2004.The results are as follows:991A didnt produce trace-pollens, or produced a very small yellow spots on anthers of partial flowers of 10.3％ ofplants only in 2001. But the spots on anther of 991A was unable to scatter pollen grains. While the low temperature sensitive CMS line D6A produced trace-pollens or mass pollens each year. Exchanged the maintainers of 991A with D6A,were formed two F1 (991A/D6B) and (D6A/991B). The rate of flowers with trace-pollens of (991A/D6B) and 991A were 2.6％,2.5％,respectively in the spring of 2001.That of (D6A/991B) and D6A were 5.35％,11.57％,respectively.Two BC1 (991A/D6B)/D6B and (D6A/991B)/991B,were formed by backcross.The rate of flowers with trace-pollen of (991A/D6B)/D6B is 5.01％,which is close to that of D6A(5.8％)in the spring of 2002. But that of (D6A/991B)/991B is 2.31％,while that of 991A is 0.0％.The results showed that the sterile stability of 991A is controlled by interaction of genes in cytoplasm and nucleus.It has the same Restorer and maintainer as D6A.Hybrid seed production test of 991A is carred out in Hunan Province. The rate of sterile plant of hybrid seed of 991A/C14910 and 991A/P1 were 2.0％,1.4％,respectively,while that of D6A/C14910 and D6A/P1 is 15.9％,13.7％,respectively. It showed that 991A is suited for hybrid seed production in Hunan climate condition.
Brassic napus cytoplasm male sterile(CMS) stable sterile trace-pollen
ZHUO Yuhong PENG Wusheng LIU Hongbin TANG Jianliang CHEN Tingzhou JIANG Lianghui
Institute of Hunan Yahuaseees, Changsha, 410116, China
国际会议
第十二届国际油菜大会( The 12th International Rapeseed Congress)
武汉
英文
82-83
2007-03-26（万方平台首次上网日期，不代表论文的发表时间）