大白菜与结球甘蓝种间异源多倍体的鉴定
利用异源多倍体作为桥梁材料是克服远缘杂交障碍,创制新种质和进行品种改良的一种重要途径.本研究对已获得的大白菜(Brassica campestrisL.ssp.pekinensis (Lour.) Olsson)与结球甘蓝(Brassica oleracea var.capitata L.)种间异源四倍体和异源三倍体,利用形态学、解剖学、分子标记及细胞学等方法进行比较鉴定.研究表明,多倍体在植株形态、花器官和气孔大小等方面均表现出巨大性和超亲优势,其中四倍体比三倍体表现普遍更明显.多倍体的气孔密度显著的低于双亲.多倍体花粉生活力比双亲降低,四倍体花粉活力为81.56%,三倍体的花粉活力仅有18...
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Published in | 农业生物技术学报 Vol. 20; no. 10; pp. 1150 - 1158 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | Chinese |
Published |
西北农林科技大学园艺学院,农业部西北地区园艺作物生物学与种质创制重点实验室,杨凌712100
2012
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Subjects | |
Online Access | Get full text |
ISSN | 1674-7968 |
DOI | 10.3969/j.issn.1674-7968.2012.10.007 |
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Abstract | 利用异源多倍体作为桥梁材料是克服远缘杂交障碍,创制新种质和进行品种改良的一种重要途径.本研究对已获得的大白菜(Brassica campestrisL.ssp.pekinensis (Lour.) Olsson)与结球甘蓝(Brassica oleracea var.capitata L.)种间异源四倍体和异源三倍体,利用形态学、解剖学、分子标记及细胞学等方法进行比较鉴定.研究表明,多倍体在植株形态、花器官和气孔大小等方面均表现出巨大性和超亲优势,其中四倍体比三倍体表现普遍更明显.多倍体的气孔密度显著的低于双亲.多倍体花粉生活力比双亲降低,四倍体花粉活力为81.56%,三倍体的花粉活力仅有18.78%.多倍体自交结实性明显低于双亲,四倍体自交结实率仅为0.28%;四倍体作为母本与大白菜杂交结籽率比其反交要高,是反交的2.11倍,以三倍体为母本或父本时与大白菜杂交,结实均非常低,且三倍体自交未获得种子.相关序列扩增多态性(SRAP)标记结果表明,多倍体中包含了双亲的遗传信息,但分f标记并不能区分四倍体与三倍体.细胞学观察显示,四倍体的染色体数目为2n=4x=38,三倍体的染色体数目为2n=3x=29.大白菜-结球甘蓝异源多倍体的鉴定为进一步大白菜品种改良和新种质的创制提供了基础资料. |
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AbstractList | 利用异源多倍体作为桥梁材料是克服远缘杂交障碍,创制新种质和进行品种改良的一种重要途径.本研究对已获得的大白菜(Brassica campestrisL.ssp.pekinensis (Lour.) Olsson)与结球甘蓝(Brassica oleracea var.capitata L.)种间异源四倍体和异源三倍体,利用形态学、解剖学、分子标记及细胞学等方法进行比较鉴定.研究表明,多倍体在植株形态、花器官和气孔大小等方面均表现出巨大性和超亲优势,其中四倍体比三倍体表现普遍更明显.多倍体的气孔密度显著的低于双亲.多倍体花粉生活力比双亲降低,四倍体花粉活力为81.56%,三倍体的花粉活力仅有18.78%.多倍体自交结实性明显低于双亲,四倍体自交结实率仅为0.28%;四倍体作为母本与大白菜杂交结籽率比其反交要高,是反交的2.11倍,以三倍体为母本或父本时与大白菜杂交,结实均非常低,且三倍体自交未获得种子.相关序列扩增多态性(SRAP)标记结果表明,多倍体中包含了双亲的遗传信息,但分f标记并不能区分四倍体与三倍体.细胞学观察显示,四倍体的染色体数目为2n=4x=38,三倍体的染色体数目为2n=3x=29.大白菜-结球甘蓝异源多倍体的鉴定为进一步大白菜品种改良和新种质的创制提供了基础资料. |
Author | 张鲁刚 卢有飞 仪泽会 张明科 惠麦侠 郭晓芹 |
AuthorAffiliation | 西北农林科技大学园艺学院,农业部西北地区园艺作物生物学与种质创制重点实验室,杨凌712100 |
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Author_FL | LU You-Fei HUI Mai-Xia ZHANG Lu-Gang YI Ze-Hui ZHANG Ming-Ke GUO Xiao-Qin |
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DocumentTitle_FL | Identification of Allopolyploids of Chinese Cabbage (Brassica campestris L.ssp.pekinensis(Lour.) Olsson) and Cabbage (B.oleracea var.capitata L.) |
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Title | 大白菜与结球甘蓝种间异源多倍体的鉴定 |
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