培育刺玫月季新品种的初步研究(Ⅱ)——刺玫月季育种中的染色体观察

Some Observations of Chromosomes during Breeding New Cultivars for Establishing A Rejuvenation Rose Group

本文报道了在刺玫月季育种中使用的6个亲本和4个F_1代杂种的染色体数目和核型。染色体数目及形态,亲本报春刺玫2n=2x=14=14m,单瓣黄刺玫2n=2x=14=14m,黄蔷薇2n=4x=28=28m,‘粉后’2n=4x=28=20m+8sm,‘秋水芙蓉’2n=4x=28=24m+4sm,‘丹凤朝阳’2n=4x=28=28m(2SAT);杂交种8401(报春刺玫ב早霞’)2n=2x=14=12m+2sm,8601(‘粉后’×黄蔷薇)2n=4x=28=28m,8703(‘丹风朝阳’×报春刺玫)2n=4x=28=28m,8706(‘秋水芙蓉’×报春刺玫)2n=3x=21=15m+6sm。核型均为1A型。文中讨论了与刺玫月季育种有关的细胞遗传学问题。

This paper reports the chromosome numbers and karyotypes of some parents and F_1 hybrid seedlings in the breeding Rejuvenation Rose Group. The results are as follows: in breeding for Rejuvenation Rose Group the parent plants Rosa primula 2n=2x=14=14m, Rosa xanthina f. normalis 2n=2x=14=14m, Rosa hugonis 2n=4x=28=24m+4sm, Rosa cv. Qeen Elizabeth 2n=4x=28=20m+8sm, Rosa cv. Qiushui Furong 2n=4x=28=24m+4sm, Rosa cv. Danfeng Chaoyang 2n=4x=28=28m (2SAT); the F_1 hybrid seedlings: 8401 (Rosa primula×Rosa cv. Zaoxia) 2n=2x=14=12m+2sm, 8601 (Rosa cv. Queen Elizabeth×Rosa hugonis)2n=4x=28=28m, 8703 (Rosa cv. Danfeng Chaoyang) 2n=4x=28=28m, 8706 (Rosa cv. Qiushui Furong×Rosa primula) 2n=3x=21=15m+6sm. They all fall in to the 1A type. Some problems concerning karyotype analysis among Rosa species and the cultivars and breeding for establishing Rj. Rose Group were discussed.