Mapping of QTLs for Dehiscence Length at Basal Part of Thecae in Rice Based on TD70/Kasalath RIL Population  

TD70/Kasalath RIL群体定位水稻花药基部开裂长度QTL（英文）

作　　者：赵凌[1] 张亚东[1] 赵春芳[1] 周丽慧[1] 姚姝[1] 于新[1] 丁丹[1] Tsutomu MATSUI 王才林[1] 

机构地区：[1]江苏省农业科学院粮食作物研究所/江苏省优质水稻工程技术研究中心/国家水稻改良中心南京分中心,江苏南京210014 [2]Faculty of Applied Biological Science,Gifu University

出　　处：《Agricultural Science & Technology》2015年第10期2189-2193,共5页农业科学与技术（英文版）

摘　　要：A population of 240 recombinant inbred lines （RIL） was derived from a cross between Japonica rice cultivar TD70 and Indica cultivar Kasalath, and their linkage map including 141 SSR markers was used to locate the QTLs controlling the length of dehiscence at the basal part of thecae （LDBT）. Then, the correlations between LDBT and other agronomic traits of rice were analyzed. Two QTLs con- trolling LDBT were mapped on chromosome 6 and 8, respectively, qLDBT6 was mapped between RM3 and RM3628 markers on chromosome 6 with a LOD value of 3.23, contribution rate of 6.18% and additive effect of 17.74%. qLDBT8 was mapped between RM1376-RM4085 markers on chromosome 8 with a LOD value 2.95, contribution rate of 8.00% and additive effect of 20.09%. This domain probably had a relationship with the sterility of rice. The LDBT of RILs had extremely signifi- cant positive correlations with flag leaf width, 1 000-grain weight, grain width, grain length and grain thickness, but no significant correlations with other agronomic traits, such as plant height, heading date, tiller number, flag leaf length, average and the maximum temperature during heading period or rice.利用花药基部开裂长度存在明显差异的粳稻品种TD70和籼稻品种Kasalath的重组自交系(包含240个系)为作图群体,对控制水稻花药基部开裂长度的QTL进行鉴定,并对水稻花药基部开裂长度和其他农艺性状进行相关性分析。利用Ici Mappingv3.4软件,运用复合区间作图法,以均匀分布于12条染色体的141个SSR标记进行花药基部开裂长度的QTL检测,共检测到2个QTL位点。位于第6染色体RM3和RM3628之间的q LDBT6,LOD值3.23,贡献率6.18%,加性效应17.74%。q LDBT8位于第8染色体RM1376和RM4085之间,LOD值2.95,贡献率8.00%,加性效应20.09%,推测该区域与小穗不育有重要关系。RIL群体的花药基部开裂长度与剑叶宽、千粒质量、粒长、粒宽、粒厚间存在极显著正相关,与抽穗期、株高、分蘖数、剑叶长、总粒数、结实率和抽穗当天最高温度、抽穗期平均温度、抽穗期最高温度以及芒长之间不相关。

关 键 词：RICE Recombinant inbred lines Length of dehiscence at the basal part of thecae： Quantitative trait locus 

分 类 号：S511[农业科学—作物学]