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盐胁迫与非胁迫条件下控制番茄苗期重要植物学性状的QTL对比研究

DOI: 10.7668/hbnxb.2011.05.013, PP. 58-65

Keywords: 番茄,盐胁迫,非盐胁迫,QTL分析

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Abstract:

利用来源于栽培番茄9706和野生契斯曼尼番茄LA0317杂交后的130个BC2S4株系为群体,采用营养液栽培法,在盐胁迫与非胁迫环境下分别对株高、茎粗、根鲜质量、根干质量、地上鲜质量、地上干质量以及耐盐级数进行了QTL分析。盐胁迫环境中检出13个QTL:株高2个;茎粗2个;根鲜质量2个;根干质量2个;地上鲜质量3个;地上干质量2个。非盐胁迫环境中检出32个QTL:株高6个;茎粗2个;根鲜质量6个;根干质量6个;地上鲜质量6个;地上干质量6个。另外,在盐胁迫条件下利用耐盐级数定位到2个耐盐性QTL,分别位于第3,6染色体上。通过盐胁迫与非胁迫下的QTL对比研究发现,第2,3,8染色体上的QTL仅在盐胁迫条件下能检测到,第9,12染色体上的QTL仅在非盐胁迫条件下能检测到,不同性状间的QTL存在共定位现象。同时,研究获得了5个表型和QTL分析均极耐盐的育种材料,可用于番茄耐盐新品种选育。

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