| 杨树三倍体育种的研究现状 |
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| 引用本文： | 张焕玲,贾小明,汪爱兰,孙军.杨树三倍体育种的研究现状[J].西北林学院学报,2004,19(3):63-66. |
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| 作者姓名： | 张焕玲 贾小明 汪爱兰 孙军 |
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| 作者单位： | 西北农林科技大学,林学院,陕西,杨陵,712100 |
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| 摘 要： | 杨树三倍体培育主要有4种方法:选育天然三倍体;筛选天然未减数的2n花粉人工授粉;四倍体与二倍体杂交;化学物理诱导.选育天然三倍体是比较简单的方法,但可供选择的数量有限.用天然2n花粉杂交获得三倍体,具有偶然性、多变性的特点,且因2n花粉比率较低,利用比较被动,但天然2n花粉活力强,三倍体得率高.四倍体与二倍体杂交获得三倍体的方法具有较强的主动性,但要先得到四倍体,增加了育种难度及年限,在没有可供利用的四倍体的情况下,只能作为一种倍性育种的辅助途径.化学物理诱导获得三倍体具有机动灵活的特点,是一种获得三倍体
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| 关 键 词： | 杨树三倍体 育种 研究现状 |
| 文章编号： | 1001-7461(2004)03-0063-04 |
| 修稿时间： | 2003年11月10 |
Recent Progress on Breeding of Poplar Triploids |
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| ZHANG Huan-ling,JIA Xiao-ming,WANG Ai-lan,SUN Jun.Recent Progress on Breeding of Poplar Triploids[J].Journal of Northwest Forestry University,2004,19(3):63-66. |
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| Authors: | ZHANG Huan-ling JIA Xiao-ming WANG Ai-lan SUN Jun |
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| Abstract: | Methods for poplar triploid breeding mainly include selcting triploid from natural population, pollinatting with 2n pollens, crossing between tetraploid and diploid, and physical and chemical induction. The first method is easier, but the triploids number is very limited in nature. The second method is accidental and changable, but because of higher vitality of natural 2n pollens , the frequence of obtaining triploid is higher. The third is only an auxiliary method, because it must obtain tetraploid first. The fouth method is effective. In order to make surmountable progress in poplar triploid breeding, reaserched on cytology ,especially chromosome technigues, must be strengthened. |
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| Keywords: | poplar triploid breeding rencent progress |
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