Molecular cytological characterization of two novel durum Thinopyrum intermedium partial amphiploids with resistance to leaf rust, stem rust and Fusarium head blight
文献类型： 外文期刊
第一作者： Zeng, J.
作者： Zeng, J.;Cao, W.;Fedak, G.;Xue, A.;Zeng, J.;Zhou, Y.;Sun, S.;Mccallum, B.;Fetch, T.
作者机构：
期刊名称：HEREDITAS （ 影响因子：3.271； 五年影响因子：2.807 ）
ISSN： 0018-0661
年卷期： 2013 年 150 卷 1 期
页码：
收录情况： SCI
摘要： Thinopyrum intermedium, a wild relative of wheat, is an excellent source of disease resistance. Two novel partial amphiploids, 08-47-50 and 08-53-55 (2n = 6x = 42), were developed from wide crosses between durum wheat and Th. intermedium. Meiotic analysis showed that pollen mother cells of the two partial amphiploids formed an average 20.49 bivalents for 08-47-50 and 20.67 bivalents for 08-53-55, indicating that they are basically cytologically stable. GISH analysis revealed that the two partial amphiploids carried different chromosome compositions. 08-47-50 had fourteen chromosomes from Th. intermedium and its alien chromosomes included six St-, four Ee- and four Ee-St translocated chromosomes, whereas 08-53-55 had four St- and ten Ee-St translocated chromosomes. Fungal disease evaluation indicated that both partial amphiploids had a high level of resistance to FHB, leaf rust and stem rust race Ug99. These two novel partial amphiploids with multiple disease resistance could be used as a new source of multiple disease resistance in bread wheat and durum wheat breeding programs.
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