关键词: 普通小麦, 偃麦草, 减数分裂, 外源易位系, 外源附加系

Abstract: The hybrid F₁ from the cross between wheat-Ag.intermedium and wheat-Ag.elongata was used as male, to transfer desirable genes of Agropyrum into the wheat variety, Chuanmai 107, recently released in southwest China. The seeds of F₂ generation were γ-radiation treated with 4 000 roentgen. The chromosomal behavior at meiosis in pollen mother cells of 148 plants from F₂M₆ progeny was observed. The results indicate that the chromosome number of observed plants ranges from 2n=41 to 2n=46, of which the plants of 2n=42 are more frequent. Most of plants with 2n=42 have stable cytology characteristics, however, trivalents, and other multivalents are also recorded at MI in other plants with 2n=42, suggesting the translocations with desirable genes might be selected from these plant progenies. In addition, more than 10 wheat-Agropyrum alien addition lines have been obtained by preliminarily cytological identification.

Key words: Triticum aestivum L., Agropyrum, meiosis, alien translocation line, alien addition line