Mapping Grain Iron and Zinc Content Quantitative Trait Loci in an Iniadi-Derived Immortal Population of Pearl Millet

Genes
Sushil KumarRakesh K Srivastava

Abstract

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 quantitative trait loci (QTLs) using diversity array technology (DArT) and simple sequence repeats (SSRs) markers to generate a genetic linkage map using 317 recombinant inbred line (RIL) population derived from the (ICMS 8511-S1-17-2-1-1-B-P03 × AIMP 92901-S1-183-2-2-B-08) cross. The base map [seven linkage groups (LGs)] of 196 loci was 964.2 cM in length (Haldane). AIMP 92901-S1-183-2-2-B-08 is an Iniadi line with high grain Fe and Zn, tracing its origin to the Togolese Republic, West Africa. The content of grain Fe in the RIL population ranged between 20 and 131 ppm (parts per million), and that of Zn from 18 to 110 ppm. QTL analysis revealed a large number of QTLs for high grain iron (Fe) and zinc (Zn) content. A total of 19 QTLs for Fe and Zn were detected, of which 11 were for Fe and eight were for Zn. The portion of the observed phenotypic variance explained by different QTLs for grain Fe and Zn content varied from 9.0 to 31.9% (cumulative 74%) and from 9.4 to 30.4% (cumulative 65%), respectively. Three large-ef...Continue Reading

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Citations

May 1, 2020·Breeding Science·Shiori Yabe, Hiroyoshi Iwata
Mar 18, 2020·Frontiers in Genetics·Rakesh K SrivastavaRajeev Gupta
Apr 17, 2021·Frontiers in Plant Science·Om Parkash YadavRajendra Singh Mahala
Oct 2, 2021·Frontiers in Plant Science·Parminder S VirkWolfgang H Pfeiffer
Oct 1, 2021·Frontiers in Plant Science·C Tara SatyavathiRakesh K Srivastava

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Methods Mentioned

BETA
electrophoresis
PCR
Genotyping

Software Mentioned

Mapmaker
GeneMapper
DArT
MapChart
PLABQTL
ExP
ICRISAT
SAS

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