栽培大麦与球茎大麦（4X）杂种F_1的细胞学研究

A Cytological Studys on F_1 Hybrid Between Cultivated Barley and Hordeum Bulbosum

栽培大麦与球茎大麦（４Ｘ）种间杂种Ｆ１的细胞学研究结果表明，杂种Ｆ１很尖细胞染色体数２ｎ＝２１。Ｃ－带带型分析展示，７条为母本栽培大麦染色体；１４条为父本球茎大麦染色体，与预期结果相符。杂种Ｆ１花粉母细胞染色体数平均为２０．６１。构型为：单价体平均５．８６；同型二价体平均５．７７；异型二价体平均０．２１；三价体平均１．０２，有时还由三价体再结合成六价体。用Ｃ－带分析异型联会染色体，结果表明，在异型二价体和三价体中的栽培大麦染色体，除染色体５外，其余６组染色体都可能参与联会，以２、３、４、７等４组染色体出现的频率较高。上述异源染色体的联会分析说明，将球茎大麦抗病基因导入栽培大麦是可能的。

Cytological analysis was carried on interspectific hybrid F1 between Hordeum vulgare (2X) and H. bulbosum (4X). The root tip chromosome number of hybrid F1 was 2n=21. C banding showed that 7 chromosomes of the hybrid F1 came from H. vulgare and 14 from H. bulbo sum. The chromosome number in the pollen mother cell of hybrid F1 averaged 20. 61, including uniovalents 5. 86, homomorphic bivalents 5. 77, heteromorphic bivalents 0. 21,trivalents 1. 02,and hexavalents occasionally detected. According to C-banding analysis of the heteromorphic bivalents and trivalents, all the chromosome groups of H. vulgars except group 5 could participate in allosyndisis, and groups 2, 3, 4 and 7 showed higher frequencies than others. The results suggest the possibility to transfer disease resistance gene from H. bulbosum in to H. vulgare.