Saritha, A and Srivastava, R K and Reddy, N and Katiyar, P and Dangi, K S (2017) Mapping Host Plant Resistance Qtls against Three Virulent Isolates of Downy Mildew PathogenIn Pearl Millet (Pennisetum glaucum [L.] R. Br.). International Journal of Pure & Applied Bioscience, 5 (5). pp. 1625-1631. ISSN 2320 – 7051
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Abstract
Downy mildew (DM) epidemics have repeatedly caused huge grain and straw production losses on pearl millet single-cross hybrids in India. The present study was undertaken to identify the QTL positions controlling DMR on the linkage map for a pearl millet mapping population of 295 F7 RIL population derived from a single F1 plant from plant × plant cross 81 B-P13 (susceptible) × AIMP 92901-P03 (resistant) using three isolates of the pathogen from Gujarat, Haryana and Rajasthan. A skeleton genetic linkage map of 536.8 cM (Haldane) was constructed using MapMaker/Exp version 3.0b at LOD threshold value of 3.0 using 39 scorable polymorphic loci. A total of four major DMR QTLs were identified on linkage groups of 1,3 and 4. The inheritance of of these QTLs showed AIMP 92901-P03 providing the resistant alleles. At least one DMR QTL was detected and mapped for each of the three DM isolates. After validation, marker-assisted selection (MAS) can now be used for improving DMR of elite pearl millet hybrid parental lines using polymorphic flanking markers from donor parent AIMP 92901-P03.
| Item Type: | Article |
|---|---|
| Divisions: | Research Program : Genetic Gains |
| CRP: | UNSPECIFIED |
| Uncontrolled Keywords: | Downy Mildew, Pathogen, Hybrid, Genetic Linkage, Pearl Millet, QTLs |
| Subjects: | Mandate crops > Millets > Pearl Millet Others > Genetics and Genomics Others > Plant Pathology |
| Depositing User: | Mr Ramesh K |
| Date Deposited: | 03 Mar 2018 09:33 |
| Last Modified: | 03 Mar 2018 09:35 |
| URI: | http://oar.icrisat.org/id/eprint/10458 |
| Official URL: | http://www.ijpab.com/vol5-iss5.php |
| Projects: | UNSPECIFIED |
| Funders: | ANGRAU |
| Acknowledgement: | Saritha thanks Acharya N.G. Ranga Agricultural University (ANGRAU) for financial help in the form of stipend during the course of work. |
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