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甘蓝型油菜与黑芥种间杂种基因组亲缘关系研究 被引量:2

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摘要 以甘蓝型油菜和黑芥为亲本,采用人工杂交并结合胚培养合成了A、B、C三基因组杂种。基因组原位杂交结果显示,在花粉母细胞减数分裂终变期,B基因组染色体以0.41~0.90的频率形成同配二价体,A、C基因组染色体以4.25~5.94频率形成二价体,B基因组与A、C基因组间形成异配二价体的频率在0.96~1.65之间,B基因组与A、C基因有较远的亲缘关系;减数分裂后期I染色体分离极不规律;B基因组染色体分离表现为多样性,2∶6极端分离方式以19%的比例出现;落后染色体、染色体桥及非四分孢子都在减数分裂过程中出现,极端异常的减数分裂是导致花粉不育的重要原因。
出处 《江苏农业科学》 北大核心 2015年第6期87-90,共4页 Jiangsu Agricultural Sciences
基金 江西省科技支撑-农业领域(编号:20141BBF60010) 江西省自然科学基金(编号:20132BAB204015) 江西省教育厅项目(编号:GJJ13698) 宜春市科技支撑(编号:JXYC2013KNA08)
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