节瓜、冬瓜重要性状资源表型多样性及亲缘关系的SRAP分析
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2013年度广州市珠江科技新星项目、2012年广东省科技攻关项目和广州市农业科学研究院立项目共同资助。


Genetic Relationship of Chieh-qua and Wax gourd based on the Morphological Phenotypes and SRAP Markers
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    摘要:

    本研究以冬瓜、节瓜38份种质资源为材料,主要对萌芽率、单果重、瓜长、宽、皮颜色、瓜型、星点多少,瓜肉厚和瓜肉色共计9个性状的表型性状进行了研究,供试材料的9个性状的表型变异系数为0.092-2.331之间,尤已单果重的变异系数最大;遗传多样性指数(H’)在0.122-1.405之间。SRAP结果显示:利用筛选出的20对引物对38份节瓜、冬瓜材料进行扩增,共扩增出多态性条带323条,遗传相似系数在0.95-0.99范围内。节瓜和冬瓜的遗传背景非常窄,普通节瓜和冬瓜亲缘关系近于黄毛类型节瓜。本研究认为节瓜不能作为冬瓜的变种,只能定位为地方品种,本研究还解决了部分材料同名异物的问题,本研究结果可为冬瓜和节瓜育种提供有价值的参考。

    Abstract:

    In this study, genetic relationship of 38 representative germplasms of the chieh-qua and wax gourd was studied based on the investigation of 9 morphological characters and SRAP markers.A total of 9 characters were studied, including the rate of germination, single fruit weight, fruit length, fruit width, skin color, shape, stars number, melon flesh and fresh color. The variation coefficient of these nine biological characters ranged from 0.092 to 0.547, among them the coefficient of single fruit weight was the maximum; their genetic diversity index (H) ranged from 0.122 to 1.405. The SRAP marker showed that totally 323 polymorphic fragments in the tested 38 chieh-qua and wax gourd materials were generated by 20 pairs of SRAP primers. The molecular genetic similarity coefficient ranged from 0.95 to 0. 99. The genetic backgrounds gap between chieh-qua and wax gourd was very narrow: the genetic relationship results showed that both common chieh-qua and wax gourd are close to the type of yellow-fuzz chieh-qua. Therefore, the chieh-qua should not be cheated as a variant of wax gourd, but can be considred as Southern China local variety; this study also addresses some material homonym problems. In a word, this study could provide the valuable reference for the chieh-qua and wax gourd breeding.

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乔燕春,林锦英,谢伟平,等.节瓜、冬瓜重要性状资源表型多样性及亲缘关系的SRAP分析[J].植物遗传资源学报,2014,15(5):1150-1155.

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  • 收稿日期:2013-11-25
  • 最后修改日期:2013-12-26
  • 录用日期:2014-08-07
  • 在线发布日期: 2014-09-05
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