Mapping grain iron and zinc content QTLs in an Iniadi-derived immortal population of pearl millet

Sushil Kumar, Charles Tom Hash, Thirunavukkarasu Nepolean, Mahesh D. Mahendarkar, Chellapilla Tara Satyavathi, Govind Singh, Abhishek Rathore, Rattan Yadav, Rajeev Gupta, Rakesh K. Srivastava

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

56 Dyfyniadau(SciVal)
146 Wedi eu Llwytho i Lawr (Pure)

Crynodeb

Pearl millet is a climate-resilient nutritious crop requiring low inputs, and is capable of giving economic returns in marginal agro-ecologies. In this study, we report large effect iron (Fe) and zinc (Zn) content QTLs using DArT arrays and SSRs to generate a genetic linkage map using 317 RIL population derived from (ICMS 8511-S1-17-2-1-1-B-P03 × AIMP 92901-S1-183-2-2-B-08) cross. The
base map (7 LGs) of 196 loci was 964.2 cM (Haldane). AIMP 92901-S1-183-2-2-B-08 is a high grain Fe and Zn line, an Iniadi parent tracing its origin to the Togolese Republic, West Africa. QTL analysis revealed a large number of QTLs for grain iron (Fe) and zinc (Zn) content. The concentration of grain Fe in the RIL population ranged between 20 and 131 ppm, and Zn from 18-110 ppm. A total
of 19 QTLs for Fe and Zn were detected, of which 11 were for Fe and 8 were for Zn. The portion of observed phenotypic variance explained by different QTLs for grain Fe and Zn concentrations varied between 9.0-31.9% (cumulative 74%) and 9.4-30.4% (cumulative 65%), respectively. Three large effect QTLs for both minerals were co-mapped in this population - one on Linkage group (LG) 1 and the remaining two on LG7. The favourable alleles for QTLs of both the mineral micronutrients were contributed by the male parent (AIMP 92901-deriv-08). Three putative epistasis interactions were observed for Fe while single digenic
interaction was for Zn. The reported QTLs may be useful in marker-assisted selection programs for seed and restorer parent breeding and population improvement programs in pearl millet.
Iaith wreiddiolSaesneg
Rhif yr erthygl9050248
Tudalennau (o-i)1-17
Nifer y tudalennau17
CyfnodolynGenes
Cyfrol9
Rhif cyhoeddi248
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - 11 Mai 2018

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