| Cytogenetics of intergeneric hybrids between Brassica species and Orychophragmus violaceus |
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| 作者姓名： | LI Zaiyun LIU Yan |
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| 作者单位： | Department of Agronomy, State Key Laboratory of Crop Genetic Improvement,Huazhong Agricultural University, Wuhan 430070, China,Department of Agronomy, State Key Laboratory of Crop Genetic Improvement,Huazhong Agricultural University, Wuhan 430070, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China (Grant Nos. 39300081, 39770467, 30070413), National Postdoctoral Science Foundation of China, Education Ministry of China, China Scholarship Council, the Natural Science Foundation of Hubei Province, Wuhan Science & Technology Committee and The Nilsson-Ehle Foundation of The Royal Physiographic Society of Sweden. |
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| 摘 要： | In the sexual intergeneric hybrids between the cultivated Brassica species and Orychophragmus violaceus, both complete separation and partial separation of the parental genomes were found to occur during mitosis and meiosis under genetic control. The cytogenetics of these hybrids was species-specific for Brassica parents. The different chromosome behavior of hybrids with three Brassica diploids ( B. campestris , B. nigra and B. oleracea ) might contribute to the different cytogenetics of hybrids with three tetraploids ( B. napus, B. juncea and B. carinata). Owing to the parental genome separation, Brassica homozygous plants and aneuploids with various chromosome constitutions were identifiable in the progenies of these hybrids, which were valuable for the study of the structure and evolution of Brassica genome and for the breeding of Brassica crops.
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| 关 键 词： | Brassica species Orychophragmus violaceus intergeneric hybrids cytogenetics genome separation |
Cytogenetics of intergeneric hybrids between Brassica species and Orychophragmus violaceus |
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| LI Zaiyun,LIU Yan.Cytogenetics of intergeneric hybrids between Brassica species and Orychophragmus violaceus[J].Progress in Natural Science,2001,11(10):721-727. |
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| Authors: | Li Zaiyun LIU Yan |
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| Institution: | Department of Agronomy, State Key Laboratory of Crop Genetic Improvement,Huazhong Agricultural University, |
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| Abstract: | In the sexual intergeneric hybrids between the cultivated Brassica species and Orychophragmus violaceus, both complete separation and partial separation of the parental genomes were found to occur during mitosis and meiosis under genetic control. The cytogenetics of these hybrids was species-specific for Brassica parents. The different chromosome behavior of hybrids with three Brassica diploids ( B. campestris , B. nigra and B. oleracea ) might contribute to the different cytogenetics of hybrids with three tetraploids ( B. napus, B. juncea and B. carinata). Owing to the parental genome separation, Brassica homozygous plants and aneuploids with various chromosome constitutions were identifiable in the progenies of these hybrids, which were valuable for the study of the structure and evolution of Brassica genome and for the breeding of Brassica crops. |
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| Keywords: | Brassica species Orychophragmus violaceus intergeneric hybrids cytogenetics genome separation |
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