Downy mildew (DM) epidemics have repeatedly caused huge grain and straw production losses pearl millet single-cross hybrids in India. The present study was undertaken to identify the positions controlling DMR on the linkage map for a pearl millet mapping population of 295 7 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, and Rajasthan. A skeleton genetic linkage map of 536.8 cM (Haldane) was constructed MapMaker/Exp version 3.0b at LOD threshold value of 3.0 using 39 scorable polymorphic . A total of four major DMR QTLs were identified on linkage groups of 1,3 and 4. The of of these QTLs showed AIMP 92901-P03 providing the resistant alleles. At least DMR QTL was detected and mapped for each of the three DM isolates. After validation, -assisted selection (MAS) can now be used for improving DMR of elite pearl millet hybrid lines using polymorphic flanking markers from donor parent AIMP 92901-P03.
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Anishetti Saritha (2017) studied this question.
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