不同类型甘蓝的可交配性研究

Crossability among Variant Types of Brassica oleracea

野生甘蓝是改良栽培甘蓝的重要资源,在漫长进化中,部分野生甘蓝类型间,以及与栽培甘蓝间杂交存在一定的生殖障碍。本研究选用8个栽培变种和7个野生类型品种,共35份甘蓝材料进行随机杂交,不同类型甘蓝的可交配性存在显著差异,甘蓝间的遗传差异、杂交方向以及生活习性等因素对甘蓝类植物可交配性存在显著影响。研究数据表明,以野生甘蓝为母本可以显著提高与栽培甘蓝杂交的效率。

Brassica oleracea includes variant wild type,which is important resources for improving cultivated types of B. oleracea. During the long evolution, reproductive isolations were formed among variant type of B. oleracea at certain degree. In the present study, 35 lines from seven wild and eight cultivated types were randomly crossed with others in order to investigate the crossability in B. oleracea. Significant differences for crossability were detected among crosses, and biological type, cross direction,and genetic difference which were found to affect the crossability significance. The results suggested that the crossability of combinations with wild type as female was higher than those with wild type as male in the crosses between wild and cultivated types of B. oleracea.