| 菜用芥菜不同变种的核型及杂种染色体行为的观察 |
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| 引用本文： | 童南奎.菜用芥菜不同变种的核型及杂种染色体行为的观察[J].西南农业大学学报,1991,13(3):321-324. |
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| 作者姓名： | 童南奎 |
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| 作者单位： | 西南农业大学园艺系 |
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| 摘 要： |
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| 关 键 词： | 芥菜 变种 核型 杂种 杂色体 |
KARYOTYPES OF SIX VARIETIES OF THE VEGETABLE MUSTARD SPECIES Brassica juncea Coss.AND THE CHROMOSOME BEHAVIOR OF THEIR HYBRIDS |
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| Tong Nankui.KARYOTYPES OF SIX VARIETIES OF THE VEGETABLE MUSTARD SPECIES Brassica juncea Coss.AND THE CHROMOSOME BEHAVIOR OF THEIR HYBRIDS[J].Journal of Southwest Agricultural University,1991,13(3):321-324. |
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| Authors: | Tong Nankui |
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| Abstract: | Using a new method for preparing mitotic chromosomes,the karyopes of six cultivars of veg-etable mustard(Brassica junica Coss.)representating Six varieties of the species were investigated.Theywere found to have the same chromosome number,2n=36,but their karyotypes and symmetry exhib-ited some difference.The karyomorphological formulae appeared to be 2n=36=12m+16ms+8st forB.juncea Coss.var.megarrhiza,2n=36=18m(2SAT)+12sm+6st for var.tumida,2n=36=2M+28m(4SAT)+6st for var.capitata;2n=36=22m(2SAT)+12sm(2SAT)+2st for var.latipa,2n=36=20m(1SAT)+12sm+4st for var.utilis,and 2n=36=18m(4SAT)+18sm for var.multiceps.Acomparison of intervarietal hybrids(F1)and their parents revealed that no significant differences exist-ed between then in the number of cells with abnormal chromosome behavior at meiosis in the pollenmother cells,suggesting that no genetic block would be present in intervarietal crossing of the species. |
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| Keywords: | variety(plant) cross breed idiogram analysis chromosome Brassica juncea Coss |
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