早熟大白菜新品种夏白45的选育

A New Chinese Cabbage F_1 Hybrid — ‘Xiabai 45’

夏白45大白菜的母本是从晋菜3号中筛选出的直筒舒心型自交不亲和系87- 3-1，父本是从北早4号中选出的自交不亲和系90-7-5。该一代杂种极早熟，从播种到收 获45～50d(天)，抗病毒病和黑腐病，一般667m2产量为3000～4000kg，比对照夏阳50增产30%左右，适于在河北、山东、山西、河南等 地推广。

Xiabai 45 is a new Chinese Cabbage F1 hybrid by cro ssing self-incompatible line 87-3-1 and 90-7-5. It has early maturity，dise ase resistance and high yield. The yield is about 45～60t·hm^(-2)，3 0% higher than Xiayang 50. It is suitable to be grown in Hebei，Shandong ，Shanxi and Henan.