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Mapping Quantitative Trait Loci Controlling High Iron and Zinc Content in Self and Open Pollinated Grains of Pearl Millet [Pennisetum glaucum (L.) R. Br.]

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Title Mapping Quantitative Trait Loci Controlling High Iron and Zinc Content in Self and Open Pollinated Grains of Pearl Millet [Pennisetum glaucum (L.) R. Br.]
 
Creator Kumar, Sushil
 
Contributor Hash, Charles
Nepolean, Thirunavukkarasu
Singh, Govind
Vengaldas, Rajaram
Rathore, Abhishek
Senapathy, Senthilvel
Mahendrakar, Mahesh D.
Yadav, Rattan
Srivastava, Rakesh
 
Subject ril
iron and zinc
qtl
Pearl millet
 
Description Pearl millet is a multipurpose grain/fodder crop of the semi-arid tropics, feeding many
of the world’s poorest and most undernourished people. Genetic variation among
adapted pearl millet inbreds and hybrids suggests it will be possible to improve grain
micronutrient concentrations by selective breeding. Using 305 loci, a linkage map was
constructed to map QTLs for grain iron [Fe] and zinc [Zn] using replicated samples
of 106 pearl millet RILs (F6) derived from ICMB 841-P3 863B-P2. The grains of
the RIL population were evaluated for Fe and Zn content using atomic absorption
spectrophotometer. Grain mineral concentrations ranged from 28.4 to 124.0 ppm for
Fe and 28.7 to 119.8 ppm for Zn. Similarly, grain Fe and Zn in open pollinated seeds
ranged between 22.4–77.4 and 21.9–73.7 ppm, respectively. Mapping with 305 (96
SSRs; 208 DArT) markers detected seven linkage groups covering 1749 cM (Haldane)
with an average intermarker distance of 5.73 cM. On the basis of two environment
phenotypic data, two co-localized QTLs for Fe and Zn content on linkage group (LG) 3
were identified by composite interval mapping (CIM). Fe QTL explained 19% phenotypic
variation, whereas the Zn QTL explained 36% phenotypic variation. Likewise for open
pollinated seeds, the QTL analysis led to the identification of two QTLs for grain Fe
content on LG3 and 5, and two QTLs for grain Zn content on LG3 and 7. The total
phenotypic variance for Fe and Zn QTLs in open pollinated seeds was 16 and 42%,
respectively. Analysis of QTL QTL and QTL QTL environment interactions
indicated no major epistasis.
 
Date 2016-11-23
2017-03-22T02:20:23Z
2017-03-22T02:20:23Z
 
Type Journal Article
 
Identifier http://oar.icrisat.org/id/eprint/9802
https://mel.cgiar.org/reporting/download/hash/9Q0UZQ9Y
Sushil Kumar, Charles Hash, Thirunavukkarasu Nepolean, Govind Singh, Rajaram Vengaldas, Abhishek Rathore, Senthilvel Senapathy, Mahesh D. Mahendrakar, Rattan Yadav, Rakesh Srivastava. (23/11/2016). Mapping Quantitative Trait Loci Controlling High Iron and Zinc Content in Self and Open Pollinated Grains of Pearl Millet [Pennisetum glaucum (L. ) R. Br. ]. Frontiers in Plant Science, 7 (1636), pp. 1-16.
https://hdl.handle.net/20.500.11766/6530
Open access
 
Language en
 
Rights CC-BY-NC-4.0
 
Format PDF
 
Publisher Frontiers Media
 
Source Frontiers in Plant Science;7,(2016) Pagination 1,16