QTL Analysis of Seed Dormancy in Indigenous Rice of Assam, India

被引：5
作者：
Rathi, S. [2 ]
Baruah, A. R. [1 ]
Chowdhury, R. K. [3 ]
Sarma, R. N. [2 ]
机构：
[1] Assam Agr Univ, Dept Agr Biotechnol, Jorhat 785013, Assam, India
[2] Assam Agr Univ, Dept Plant Breeding & Genet, Jorhat 785013, Assam, India
[3] Assam Agr Univ, Reg Agr Res Stn, Titabar, Assam, India
来源：
CEREAL RESEARCH COMMUNICATIONS | 2011年 / 39卷 / 01期
关键词：
ahu rice; duration of dormancy; seed dormancy; QTL; ORYZA-SATIVA L; TRAIT; LOCI; IDENTIFICATION; RESISTANCE; BACKCROSS; MARKERS;
D O I：
10.1556/CRC.39.2011.1.14
中图分类号：
S3 [农学（农艺学）];
学科分类号：
0901 ;
摘要：
Quantitative Trait Loci (QTL) analyses were conducted in a mapping population of 91 F-2 plants derived from a cross between two ahu rice cultivars of Assam, Cheni ahu (dormant, Oryza sativa ssp. indica) and Kolong (non-dormant, Oryza sativa ssp. indica) in order to identify genomic regions affecting seed dormancy and the duration of dormancy. The linkage map based on 70 simple sequence repeat (SSR) markers detected two QTLs for seed dormancy (qSD5, qSD11) and one QTL for duration of dormancy (qSDD5), and came from the dormant parent. The levels of dormancy increased with the presence of any one of the QTLs but qSD5 had larger effect on increasing dormancy, indicating that dormancy could be effectively enhanced by more than one QTL. The QTLs detected could be used to develop near-isogenic lines (NILs) for map-based cloning of seed dormancy in rice, thus to improve the understanding of dormancy of indica rice.
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页码：137 / 146
页数：10
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