| ‘禅寺丸’甜柿2n花粉形成机制的研究 |
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| 引用本文： | 谷晓峰,罗正荣. ‘禅寺丸’甜柿2n花粉形成机制的研究[J]. 园艺学报, 2003, 30(2): 135-140 |
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| 作者姓名： | 谷晓峰 罗正荣 |
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| 作者单位： | ( 华中农业大学园艺林学学院，武汉 430070； 湖北民族学院园艺系，恩施 445000) |
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| 基金项目： | 国家自然科学基金项目 (30 0 70 5 2 9)，教育部优秀青年资助计划项目，高等学校博士学科专项科研基金资助项目(19990 0 40 0 1) |
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| 摘 要： | 以2n花粉发生频率较高的甜柿品种‘禅寺丸’为试材，研究影响2n花粉形成的减数分裂行为。结果表明：2n花粉形成受融合纺锤体(fused spindles)，八字形纺锤体(triangle spindles)及后期Ⅱ染色单体不正常分离(abnormal disorientation of sister chromatid)3种减数分裂行为控制；融合纺锤体及八字形纺锤体形成的2n花粉占2n花粉总数的94.8%，在遗传上等同于FDR(first division restitution，第1次分裂重组)型配子；由姊妹染色单体不正常分离形成的2n花粉在遗传上等同于SDR (second division restitution，第2次分裂重组)型配子。甜柿2n花粉绝大多数为FDR型，因而在倍性育种中有重要的应用价值。
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| 关 键 词： | 柿 2n花粉 减数分裂 |
| 文章编号： | 0513-353X(2003)02-0135-06 |
| 收稿时间： | 2002-08-15 |
| 修稿时间： | 2002-08-15 |
Studies on Abnormal Meiosis Producing 2n Pollens in Nonastringent Persimmon(Diospyros kaki Thunb.) |
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| Gu Xiaofeng and Luo Zhengrong . Studies on Abnormal Meiosis Producing 2n Pollens in Nonastringent Persimmon(Diospyros kaki Thunb.)[J]. Acta Horticulturae Sinica, 2003, 30(2): 135-140 |
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| Authors: | Gu Xiaofeng and Luo Zhengrong |
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| Affiliation: | ( College of Horticulture and Forestry，Huazhong Agricultura University,Wuhan 430070,China; Department of Horticulture, Hubei Institute for Nationalities，Enshi 445000，China) |
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| Abstract: | The objective of this study was to determine the eytolngieal origin of 2n posen in ‘Zenjiman’ persimmon．Pollen mother cel analyses revealed that 2n polen resulted from fused spindles，triange spindles，or abnormal disorientation of sister ehromatid during metaphase II and anaphase II of mierosporogenesis．94.8% of 2n po len formation was controled by fused spindles and triange spindles ，which were genetically equivalent to first division restitution(FDR)type of gamete formation．The other 2n polens were genetically equivalent to second division restitution (SDR)type of gam ete formation．Thus 2n polen produced from IjiIIlal1l persimmon call provide potential value for po lyploidy breeding in persimmon．Key words： |
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| Keywords: | Persimmon 2n pollen Meiosis |
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