空间诱变创制不结球白菜晚抽薹新种质及新品种艳春的选育

Development of A New Late-bolting Germplasm and Breeding A New Cultivar Yanchun of Pak-choi by Using Space Mutation

为创制不结球白菜新种质,并利用其选育新品种,通过空间诱变育种技术创制了不结球白菜晚抽薹新种质SP67,并与传统育种方法相结合,选育了不结球白菜晚抽薹杂交新品种艳春。形态观察表明,艳春植株直立,中矮箕类型,生长势强;叶深绿色,叶面光滑;叶柄淡绿色、较宽;耐寒性强,抗病抗逆性好,抽薹晚,品质优良;播种后35 d采收平均产量为2 750 kg·666.7 m^(-2),全国各地均可种植。艳春通过空间诱变结合传统育种技术选育而成,该品种的选育说明空间诱变对不结球白菜具有明显的诱变效应,对后代农艺性状的改良具有促进作用,对解决春季不结球白菜的供应具有重要意义。

In order to develope a new pak-chi germplasm, and use it to breeding new cultivars. In this study, a new late bolting pak？chi germplasn SP67 was developed by space mutation, and a new cultivar Yanchun was breeded by using space mutation combined with traditional breeding methods. Morphological observations showed that Yanchun is erect, compact plant type, vigorous growth, glossy green outer leaves, wide-long green petiole, cold resistance and high disease resistance, late bolting and high quality. The average yield of Yanchun is 2 750 kg·666.7m^-2 at 35 days after seeding, and it′s suitable for cultivation all over the country. Breeding of Yanchun showed that the mutagenic effect of pak？choi is very apparent through space mutation and can promote the improvement of agronomic characters and it′s great significants to supply of pak-chi in spring.