| 普通小麦-簇毛麦染色体异附加系的细胞学稳定性分析 |
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| 引用本文： | 王苏玲,陈佩度,邱伯行,黄琍,刘大钧.普通小麦-簇毛麦染色体异附加系的细胞学稳定性分析[J].南京农业大学学报,1989(1). |
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| 作者姓名： | 王苏玲 陈佩度 邱伯行 黄琍 刘大钧 |
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| 作者单位： | 南京农业大学细胞遗传研究室
(王苏玲，陈佩度，邱伯行，黄琍)，南京农业大学细胞遗传研究室(刘大钧) |
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| 摘 要： | 在根尖细胞染色体计数和N-分带鉴定基础上,通过花粉母细胞(PMC)减数分裂中期Ⅰ(MI)的染色体配对分析对本室育成的5个普通小麦-簇毛麦异附加系进行细胞学稳定性分析。在被测的30个株系121单株中,2n=44,43和42的植株分别占77.7％,14.0％和3.3％。在进行染色体配对分析的15个二体异附加系植株中,有8株平均每个PMC的二价体数超过21.6个,单价体数低于0.5个,没有出现或仅在个别细胞中出现三价体或四价体,在细胞学上已基本稳定。另有半数植株的二价体数虽然也超过21个,但全部是22个二价体的PMC频率相对较低,含有单价体、三价体和四价体的PMC频率相对较高,它们在细胞学上尚不稳定。为保特异附加系的稳定,必须经常进行细胞学稳定性鉴定。
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| 关 键 词： | 异附加系 普通小麦 簇毛麦 细胞学 稳定性 |
THE CYTOLOGICAL STABILITY ANALYSIS OF TRITICUM AESTIVUM-HAYNALDIAVILLOSA ADDITION LINES |
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| Wang Suling,Chen Peidu,Qiu Boxing,Huang Li and Liu Dajun.THE CYTOLOGICAL STABILITY ANALYSIS OF TRITICUM AESTIVUM-HAYNALDIAVILLOSA ADDITION LINES[J].Journal of Nanjing Agricultural University,1989(1). |
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| Authors: | Wang Suling Chen Peidu Qiu Boxing Huang Li and Liu Dajun |
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| Abstract: | On the basis of chromosome counting and N-banding of root tip cells, cytogenetic stability of five Triticum aestivum-Hayualdia villosa addition lines developed by Cytogenetic Research Laboratory, Nanjing Agric. Univ. was studied through meiotic analysis of these additions. Among 121 plants of 30 lines, the plants with 2n=44, 43 and 42 made up 77.7%, 14.0% and 3.3% respectively. Among the 15 analysed plants of disomic addition lines there were 7 with the average bivalent numbers more than 21.6 and the numbers of univalent were lower than 0.5. Trivalents and/or quadrivalents had not been, or had been sporadically observed in PMCs of these plants. So they were almost stable cytologically. As for the remaining plants, although the numbers of bivalents exceed 21, the frequency of PMCs all with 22 bivalents was rather low while the frequency of PMCs with univalents, trivalents and quadrivalents was relatively high. These plants were proved still unstable cytologically. In order to keep the stability of alien addition lines, careful cytological analysis should be required. |
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| Keywords: | Alien addition line Triticum aestivum Haynaldia villosa Cytology Stability |
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