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甘兰(Brassica Oleracea Var.Capitata.L.)是雌雄同花异花授粉植物,花器小,每荚只结种子约10—20粒,在杂种一代优势利用的杂种一代种子的制种中,不可能采用人工授粉生产杂种种子,当用一般品种或自交系作杂交亲本时,一代种子的杂交率只有70％左右,尚有30％左右的本品种内或系内异交个体,因而不能充分表现出杂种一代优势,而且后代群体混杂影响产品质量。因此利用杂种一代优势就必须解决制种途径问题。十字花科植物的自交不亲和性早已被发现(L.R.Deti 1926),而对自交不亲和性遗传的研究,也在40多年前已经开始,但把自交不亲和系应用于生产,大约始于1949年以后。日本在1950年用自交不亲和系培育成功“长岗交配一号”甘兰,成为轰动世界舆论的成果。据藤
Brassica Oleracea Var. Capitata L. is a monoecious allogamy pollinator with a small floral per plant, with seeds only about 10-20 seeds per pod. In hybrid seed generation, Hybrid seeds may be produced by artificial pollination. When using common varieties or inbred lines as hybrid parents, the hybridization rate of the first generation of seeds is only about 70%, and about 30% of the hybrids within or outside of this species can not be fully Showing the advantages of the hybrid generation, and the mixture of future generations affect product quality. Therefore, the use of hybrid generation advantages must solve the problem of seed production. Self-incompatibility of cruciferous plants has long been discovered (LRDeti 1926), and the study of the genetic basis of self-incompatibility has also begun more than 40 years ago, but self-incompatibility was applied to Production, about began after 1949. Japan in 1950 with self-incompatibility system to cultivate the success of “long-term copulation on the 1st” Brandy, became the result of sensational world public opinion. According to rattan