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Co-location of quantitative trait loci for drought and salinity tolerance in rice |
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| รหัสดีโอไอ | |
| Creator | Vaiphot Kanjoo, Suwat Jearakongman, Kanchana Punyawaew, Jonaliza L. Siangliw, Meechai Siangliw, Apichart Vanavichit, Theerayut Toojinda |
| Title | Co-location of quantitative trait loci for drought and salinity tolerance in rice |
| Publisher | Genetics Society of Thailand |
| Publication Year | 2554 |
| Journal Title | Thai Journal of Genetics |
| Journal Vol. | 4 |
| Journal No. | 2 |
| Page no. | 126 |
| Keyword | drought tolerance, salinity tolerance, QTL, rice, chromosome segment substitution lines |
| ISSN | 8578664 |
| Abstract | Drought and salinity stresses are major constraints limiting growth and productivity of rice plants in rainfed lowland areas of the Northeast of Thailand where Thai jasmine rice cultivar Khao Dawk Mali 105 (KDML105) is planted as majority. In this study, chromosome segment substitution lines (CSSL) of the KDML105 that carry quantitative trait loci (QTL) associated with drought tolerance (DT) located on chromosomes 1, 3, 4, 8 and 9 were evaluated for salinity tolerance (ST) at seedling stage. Seven CSS lines exhibited higher ST than the recipient KDML105. Some of these CSS lines displayed higher grain yield than KDML105 when tested in rainfed lowland. Eight QTL for ST were identified on chromosomes 1, 3, 4, 7, 8, 9, 10 and 12. Of these, four are located in the same position of the DT-QTL previously reported. The co-locations of DT and ST QTL may indicate a common mechanism for tolerance. In addition, CSSLs showing good performances under both drought and salinity stresses can be used as a new source of breeding materials in Thai rainfed lowland areas. |
