人工合成甘蓝型油菜特长角变异系的选育

Development of a Specially-long Pod Variant Line from Resynthesized Brassica napus L.

用中国西藏东部采集的1个白菜型油菜地方品种与云南甘蓝类蔬菜白花芥蓝远缘杂交,人工合成了甘蓝型油菜新材料,从杂种后代中通过系统选育,获得了1个特长角变异系,其主花序中部角果平均长度2 0cm左右,果身长16～18cm ,果喙长3cm左右。从中获得的极端最长角果达31 5cm ,果身长2 6 1cm ,果喙长5 4cm。这是迄今芸苔属植物中很少见到的长角果油菜材料。该材料的平均角果长度大约为普通甘蓝型油菜的3倍左右,遗传已基本稳定,定名为川农特长角。本文报导其选育经过和主要特征特性,并对其育种和研究利用价值作了简要分析。

A Specially-long pod variant line was selected from resynthesized B. napus lines derived from an distant crossing between a landrace of B. campestris L. , collected in eastern Tibet, and a vegetable cabbage, B. oleracea vat. alboglabra Bailey from Yunnan in China. The average length of pods at the middle of main racemes was about 20cm, with a body length of 16- 18cm and a beak length of about 3cm. The longest pod from this variant line reached 31.5cm, with a body length of 26. lcm and a beak length of 5.4cm. This is a line with specially long pods rarely seen in Brassica species. The average pod length of the variant line was about 3 times that of the common B. napus. It has been genetically stable and is named Chuannong Techangjiao. The breeding process and the main characteristics of the specially-long pod variant were reported and the breeding and research values were briefly analyzed in the paper.