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| Content Provider | Springer Nature Link |
|---|---|
| Author | Dang, Xiaojing Thi, Thu Giang Tran Dong, Guanshan Wang, Hui Edzesi, Wisdom Mawuli Hong, Delin |
| Copyright Year | 2014 |
| Abstract | Twenty-seven QTLs were identified for rice seed vigor, in which 16 were novel QTLs. Fifteen elite parental combinations were designed for improving seed vigor in rice. Seed vigor is closely related to direct seeding in rice (Oryza sativa L.). Previous quantitative trait locus (QTL) studies for seed vigor were mainly derived from bi-parental segregating populations and no report from natural populations. In this study, association mapping for seed vigor was performed on a selected sample of 540 rice cultivars (419 from China and 121 from Vietnam). Population structure was estimated on the basis of 262 simple sequence repeat (SSR) markers. Seed vigor was evaluated by root length (RL), shoot length (SL) and shoot dry weight in 2011 and 2012. Abundant phenotypic and genetic diversities were found in the studied population. The population was divided into seven subpopulations, and the levels of linkage disequilibrium (LD) ranged from 10 to 80 cM. We identified 27 marker–trait associations involving 18 SSR markers for three traits. According to phenotypic effects for alleles of the detected QTLs, elite alleles were mined. These elite alleles could be used to design parental combinations and the expected results would be obtained by pyramiding or substituting the elite alleles per QTL (apart from possible epistatic effects). Our results demonstrate that association mapping can complement and enhance previous QTL information for marker-assisted selection and breeding by design. |
| Starting Page | 1309 |
| Ending Page | 1319 |
| Page Count | 11 |
| File Format | |
| ISSN | 00320935 |
| Journal | Planta |
| Volume Number | 239 |
| Issue Number | 6 |
| e-ISSN | 14322048 |
| Language | English |
| Publisher | Springer Berlin Heidelberg |
| Publisher Date | 2014-03-26 |
| Publisher Place | Berlin/Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Association analysis Elite allele Rice Seed vigor Simple sequence repeat (SSR) Plant Sciences Agriculture Ecology Forestry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Genetics Plant Science |
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