利用渐渗系群体初步定位番茄苗期耐旱QTL  

Mapping of QTLs for Drought Tolerance During Seedling Stage Using Introgression Line Populations in Tomato

作　　者：刘磊[1] 宋燕[1] 李君明[1] 

机构地区：[1]中国农业科学院蔬菜花卉研究所,农业部园艺作物遗传改良重点开放实验室,北京100081

出　　处：《园艺学报》2011年第10期1921-1928,共8页Acta Horticulturae Sinica

基　　金：中央级公益性科研院所基本科研业务费专项(201109);农业部‘948’项目(2011-Z3)

摘　　要：利用来自耐旱野生番茄资源Solanum lycopersicoides LA2951和Solanum pennellii LA0716的渐渗系(introgression line,IL)群体,对野生种可能存在的苗期耐旱位点进行了初步定位。从LA2951群体定位了qDT-l-3、qDT-l-6和qDT-l-123个QTLs,它们分别位于染色体3、6和12上;利用LA0716群体定位了qDT-p-1、qDT-p-2a、qDT-p-2b、qDT-p-3、qDT-p-4、qDT-p-5、qDT-p-8、qDT-p-9、qDT-p-10a、qDT-p-10b和qDT-p-1211个QTLs,它们分别位于染色体1、2、3、4、5、8、9、10和12上。利用番茄高密度遗传图谱分析表明,上述2个群体位于第12染色体上的QTL可能等位,qDT-p-9可能与前人从野生种Solanum pimpinellifolium LA0722鉴定的位于第9染色体上芽期耐旱的QTL等位。In this paper, two introgression line （IL） populations respectively derived from the wild species Solanum lycopersicoides LA2951 and S. pennellii LA0716 were used to map the possible loci for drought tolerance during the seedling stage. The results showed that 3 QTLs （qDT-I-3, qDT-l-6 and qDT-l-12） located on chromosome 3, 6 and 12 were identified from S. lycopersicoides LA2951 introgression line population and 11 QTLs （qDT-p-1, qDT-p-2a, qDT-p-2b, qDT-p-3, qDT-p-4, qDT-p-5, qDT-p-8, qDT-p-9, qDT-p-lOa, qDT-p-lOb and qDT-p-12 ） located on chromosome 1, 2, 3, 4, 5, 8, 9, 10 and 12 from S. pennellii LA0716 population. Based on the high density tomato linkage map, QTL located on chromosome 12 might be co-localized from the above two IL populations and QTL qDT-p-9 might be co-localized with a previously identified QTL conferring drought tolerance during seed germination from S. pimpinellifolium LA0722 on chromosome 9.

关 键 词：番茄 耐旱 渐渗系 QTL 

分 类 号：S641.2[农业科学—蔬菜学]