Genetic variability, genotype × environment interaction and correlation analysis for grain iron and zinc contents in recombinant inbred line population of pearl millet [Pennisetum glaucum (L). R.

    Mahendrakar, M D and Kumar, S and Singh, R B and Rathore, A and Potupureddi, G and KaviKishor, P B and Gupta, R and Srivastava, R K (2019) Genetic variability, genotype × environment interaction and correlation analysis for grain iron and zinc contents in recombinant inbred line population of pearl millet [Pennisetum glaucum (L). R. Indian Journal of Genetics and Plant Breeding (TSI), 79 (3). pp. 545-551. ISSN 0019-5200

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    Abstract

    Micronutrient malnutrition is one of the major health problems, especially iron (Fe) and zinc (Zn) deficiencies that are widespread coupled with inadequate food supply in the developing world. Pearl millet grains are a good source of Fe and Zn elements making it a potential staple crop for overcoming hidden-hunger and micronutrient deficiencies. Breeding pearl millet with high levels of grain Zn and Fe contents represents a major opportunity to enhance the intake of these minerals for poor and malnourished people. A precise understanding of the genetic variability, correlation of mineral nutrients, genotype × environment (G × E) interaction is important for developing improved lines with high Fe and Zn content. To get fair estimates, we used a bi-parental recombinant inbred lines (RIL) mapping population representing F2 phenotypic variance. A total of 317 RILs were evaluated for grain iron and zinc content in two seasons, Summer 2016 (E1) and Summer 2017 (E2). The result from the analysis of variance exhibited a large variability for grain Fe and Zn content across the two environments. The G × E for high grain Fe were significant at P < 0.01. The mean performance across the two environments data for grain Fe ranged from 22.9 to 154.5 mg kg-1 (ppm) and Zn content ranged from 19.3 to 121 mg kg-1. The correlation coefficient for grain Fe and Zn was 0.9, and 0.8 and across the two (E1 and E2) environments. The value of correlation coefficient (0.9) was found to be highly significant at P < 0.01 level, that indicated good opportunities for simultaneous genetic improvement of both iron and zinc contents in pearl millet.

    Item Type: Article
    Divisions: Research Program : Genetic Gains
    CRP: CGIAR Research Program on Dryland Cereals
    Uncontrolled Keywords: Pearl millet, Micronutrients, Iron and Zinc, Recombinant inbred lines (RILs), Genotype x environment (GxE) interaction
    Subjects: Others > Cereals
    Mandate crops > Millets > Pearl Millet
    Others > Genetics and Genomics
    Others > Food and Nutrition
    Depositing User: Mr Arun S
    Date Deposited: 17 Mar 2020 06:08
    Last Modified: 17 Mar 2020 06:08
    URI: http://oar.icrisat.org/id/eprint/11399
    Official URL: https://doi.org/10.31742/IJGPB.79.3.3
    Projects: UNSPECIFIED
    Funders: UNSPECIFIED
    Acknowledgement: Authors are thankful to all the team members involved in the entire field operations. We also would like to acknowledge Charles Renard Analytical Laboratory for analyzing grain iron and zinc contents of samples. This work was carried out as a part of the CGIAR Research Program on Dryland Cereals.
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