Peng, Lv. and Ji, G. and Han, Y. and et al, . (2013) Association analysis of sugar yield-related traits in sorghum [Sorghum bicolor (L.)]. Euphytica, 193 (3). pp. 419-431.
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Abstract
Association mapping is widely used for detecting QTLs in higher plants. In the present study a synthetic sorghum population containing 119 representative samples, including 43 sweet and 76 grain sorghum accessions originating mainly from China, USA and India, were genotyped using 51 simple-sequence repeat (SSR) markers. Linkage disequilibrium (LD) of pair-wise loci and population structure were analyzed, followed by association analysis of SSR loci and 3 sugar yield related traits using the TASSEL general linear model program. Results showed that: (i) different degrees of LD occurred among syntenic markers and also among nonsyntenic markers, indicating historical recombination among sorghum linkage groups; (ii) significant LD extended up to 7.31 cM; (iii) the collection of accessions was composed of three subgroups; (iv) four marker loci were associated with stalk sugar concentration, fresh stalk weight and stalk juice weight measured in different growing environments and could be used, therefore, in future marker assisted breeding programs. Several loci were also associated with two or more traits simultaneously, which might be due to tight linkage between different genes affecting these traits and/or pleiotropy. In addition, some associated markers were located close to QTLs previously mapped in family-based linkage mapping analyses.
| Item Type: | Article |
|---|---|
| Additional Information: | This work was supported financially by a special fund for Agricultural Science, Technology and Innovation in Hebei, China (No. 2011055001) and China State Industrial System for Agricultural Research (CARS-06-01A). |
| Uncontrolled Keywords: | Sorghum bicolor, SSR, Population structure, Association mapping, |
| Author Affiliation: | Institute of Millet Crops, Hebei Academy of Agricultural and Forestry Sciences, Shijiazhuang 050031, China e-mail: guoqingliu@hotmail.com |
| Subjects: | Crop Improvement |
| Divisions: | Sorghum |
| Depositing User: | Mr Siva Shankar |
| Date Deposited: | 13 Sep 2013 04:50 |
| Last Modified: | 13 Sep 2013 04:50 |
| Official URL: | http://dx.doi.org/10.1007/s10681-013-0962-7 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/11701 |
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