Discovery and the genetic basis of a thermo-sensitive genic ms line with large flowers in Brasscia napus L

摘要

104S is a new TG ms line which has been found and bred by means of systematic breeding from the plant group of inbreeding 99104 in Brassica napus. The investigations of fertility show that 104S has the similar changing regularity of fertility to the previous TG ms lines such as Xiangyou 402S, but is different in flower morphology from the latter. The petals of 104S are larger obviously than those of Xiangyou 402S. The genetic studies indicate that the fertility of 104S is controlled jointly by a couple of recessive ms genes and a couple of mainly effective thermo-sensitive genes with some minor genes, and its ms genes and thermo-sensitive genes are not the allele of that of Xiangyou 402S.