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Asynchronous meiosis in Cucumis hystrix–cucumber synthetic tetraploids resulting in low male fertility 被引量:2
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作者 Yonghua Han Junsong Pan +2 位作者 paradee thammapichai Zongyun Li Yiqun Weng 《The Crop Journal》 SCIE CAS CSCD 2016年第4期275-279,共5页
Interspecific hybridization and allopolyploidization contribute to the improvement of many important crops. Recently, we successfully developed an amphidiploid from an interspecific cross between cucumber(Cucumis sati... Interspecific hybridization and allopolyploidization contribute to the improvement of many important crops. Recently, we successfully developed an amphidiploid from an interspecific cross between cucumber(Cucumis sativus, 2n = 2x = 14) and its relative C. hystrix(2n = 2x = 24) followed by chemical induction of chromosome doubling. The resulting allotetraploid plant was self-pollinated for three generations. The fertility and seed set of the amphidiploid plants were very low. In this study, we investigated the meiotic chromosome behavior in pollen mother cells with the aid of fluorescence in situ hybridization, aiming to identify the reasons for the low fertility and seed set in the amphidiploid plants. Homologous chromosome pairing appeared normal, but chromosome laggards were common, owing primarily to asynchronous meiosis of chromosomes from the two donor genomes. We suggest that asynchronous meiotic rhythm between the two parental genomes is the main reason for the low fertility and low seed set of the C. hystrix–cucumber amphidiploid plants. 展开更多
关键词 CUCUMBER CUCUMIS HYSTRIX AMPHIDIPLOID MEIOSIS Asynchrony
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