阿拉拉特小麦与普通小麦杂交种及其后代的白粉病抗性与细胞学分析

Cytological and Powdery Mildew Resistance Analyses of Common Wheat× Triticum araraticum Hybrids and Their Progenies

阿拉拉特小麦与普通小麦杂交种及其后代的白粉病抗性与细胞学分析张旭钟少斌姚景侠张旭：女，２４岁，大学，研究实习员。本研究为“九五”国家小麦育种攻关项目。收稿日期：１９９６－０８－１５（江苏省农业科学院农业生物遗传生理研究所，南京２１００１４）关键词：普...

In order to transfer the powdery mildew resistance gene of Triticum araraticum to common wheat, T.araraticum was crossed with common wheat cultivars,and the resulting F 1 plants were selfcrossed or backcrossed to the wheat cultivars.All plants of F 1 hybrids and some of F 2 and F 3 progenies were identified to be resistant to powdery mildew.The cytological analysis showed that less than 7 pairs of bivalents per PMC at metaphase I of F 1 hybrids were observed and C banding showed that the bivalents consisted of A u and A b chromosomes. Trivalents,tetravalents and a few pentavalents were also observed in PMCs.More than 90 percent of somatic cells in the F 3 progeny had 42 chromosomes,some of which obtained the chromosomes from T.araraticum .