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Genetic Dissection Of Drought Tolerance In Chickpea (Cicer Arietinum L.)
| Content Provider | International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) |
|---|---|
| Author | Varshney, R. K. Thudi, M. Nayak, S. N. Gaur, P. M. Kashiwagi, J. Krishnamurthy, L. Jaganathan, D. Koppolu, J. Bohra, A. Tripathi, S. Rathore, A. Jukanti, A. K. Jayalakshmi, V. Vemula, A. Singh, S. J. Yasin, Md Sheshshayee, M. S. Viswanatha, K. P. |
| Copyright Year | 2014 |
| Abstract | Chickpea (Cicer arietinum L.) is the second most important grain legume cultivated by resource poor farmers in the arid and semi-arid regions of the world. Drought is one of the major constraints leading up to 50 % production losses in chickpea. In order to dissect the complex nature of drought tolerance and to use genomics tools for enhancing yield of chickpea under drought conditions, two mapping populationsICCRIL03 (ICC 4958 × ICC 1882) and ICCRIL04 (ICC 283 × ICC 8261) segregating for drought tolerance-related root traits were phenotyped for a total of 20 drought component traits in 17 seasons at 15 locations in India. Individual genetic maps comprising 241 loci and 168 loci for ICCRIL03 and ICCRIL04, respectively, and a consensus genetic map comprising 352 loci were constructed (http: cmap.icrisat.ac.in cmap sm cp varshney ). Analysis of extensive genotypic and precise phenotypic data revealed 45 robust main-effect QTLs (M-QTLs) explaining up to 58.20 % phenotypic variation and 973 epistatic QTLs (E-QTLs) explaining up to 92.19 % phenotypic variation for several target traits. Nine QTL clusters containing QTLs for several drought tolerance traits have been identified that can be targeted for molecular breeding. Among these clusters, one cluster harboring 48 % robust M-QTLs for 12 traits and explaining about 58.20 % phenotypic variation present on CaLG04 has been referred as (3z(BQTL-hotspot(3y.(B This genomic region contains seven SSR markers (ICCM0249, NCPGR127, TAA170, NCPGR21, TR11, GA24 and STMS11). Introgression of this region into elite cultivars is expected to enhance drought tolerance in chickpea. |
| File Format | |
| ISSN | 00405752 14322242 |
| Journal | PeerReviewed |
| DOI | 10.1007/s00122-013-2230-6 |
| Language | English |
| Publisher | Springer Verlag |
| Publisher Date | 2014-01-01 |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Chickpea Genetics and Genomics |
| Content Type | Text |
| Resource Type | Article |
| Subject | Genetics Medicine Biotechnology Agronomy and Crop Science |
