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Indian Journal of Pure & Applied Biosciences (IJPAB)
Year : 2017 , Volume 5, Issue 5
Page No. : 1625-1631
Article doi: : http://dx.doi.org/10.18782/2320-7051.5736
Mapping Host Plant Resistance Qtls against Three Virulent Isolates of Downy Mildew PathogenIn Pearl Millet (Pennisetum glaucum [L.] R. Br.)
Anishetti Saritha1, Rakesh K. Srivastava2, Narayan Reddy3 and Pooja Katiyar2 and Kuldeep Singh Dangi1*
1Department of Genetics and Plant Breeding,College of aAgriculture,Rajendranagar, S500 030
2International Crops Research Institute for the Semi-Arid Tropics, Patancheru, 502324
3Department of Plant Pathology,College of Agriculture,Rajendranagar, 500 030
*Corresponding Author E-mail: dangiks24@gmail.com
Received: 9.07.2017 | Revised: 5.08.2017 | Accepted: 8.08.2017
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.
Key words: Downy Mildew, Pathogen, Hybrid, Genetic Linkage
Full Text : PDF; Journal doi : http://dx.doi.org/10.18782/2320-7051.5736
Cite this article:
Saritha, A., Srivastava, R.K., Reddy, N., Katiyar, P. and Dangi, K.S., Mapping Host Plant Resistance Qtls against Three Virulent Isolates of Downy Mildew Pathogen in Pearl Millet (Pennisetum glaucum [L.] R. Br.), Int. J. Pure App. Biosci. 5(5): 1625-1631 (2017). doi: http://dx.doi.org/10.18782/2320-7051.5736
