玉米耐盐种质筛选及群体遗传结构分析
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Screening of Maize Germplasms for Salt-tolerance and Evaluation of Population Genetic Structure
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    摘要:

    本研究采用盆栽法评价了157份玉米自交系的苗期耐盐性,并利用115对SSR标记解析了耐盐自交系的群体遗传结构。结果表明,T5V、N1026、农大1145及4S等10份玉米自交系为高耐盐玉米种质;处理后10d株高、地上鲜重、地下鲜重、地上干重、地下干重及存活率可作为玉米苗期耐盐鉴定的重要指标;利用SSR分子标记,结合系谱资料,将157份自交系划为6个类群,其中具有通系5血缘(Ⅰ类群)、泰国糯玉米种质血缘(Ⅲ类群)及旅大红骨、黄早四等血缘(Ⅵ类群)的自交系耐盐性较强,是开展玉米耐盐育种的重要种质类群。本研究筛选到的耐盐种质将为玉米耐盐遗传机制研究、玉米种质遗传改良及耐盐分子育种提供优异的基因资源。

    Abstract:

    The salt tolerances of 157 maize inbred lines were evaluated during the seedling stage by means of potted identification, and the population structure of the studied inbred lines was analyzed using 115 SSR markers. The results showed that ten maize inbred lines, including T5V, N1026, Nongda 1145, 4S and so on, were highly salt-tolerant maize germplasms; the plant height in 10 days after treatment (10DPH), shoot fresh weight (SFW), root fresh weight (RFW), shoot dry weight (SDW), root dry weight (RDW) and survival rate (SR) could be used as key indicators for identification of salt tolerance in the maize seedling stage. Evaluation of population structure indicated that 157 inbred lines could be classified into six groups, which were generally consistent with their known pedigrees. The inbred lines derived from Tongxi 5 ( group Ⅰ) , the waxy germplasms from Thailand (group Ⅲ) and those from LRC, Huangzaosi and so on, were highly tolerant to salt, which were important germpalsms in maize breeding for salt tolerance. These screened salt-tolerant maize germplasms would provide excellent genetic resources for the studies of genetic mechanisms in maize, maize improvement and molecular breeding for salt tolerance in the future.

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郝德荣,程玉静,徐辰武,等.玉米耐盐种质筛选及群体遗传结构分析[J].植物遗传资源学报,2013,14(6):1153-1160.

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历史
  • 收稿日期:2013-05-02
  • 最后修改日期:2013-08-28
  • 录用日期:2013-08-29
  • 在线发布日期: 2013-09-24
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