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Grain iron and zinc density in pearl millet: combining ability, heterosis and association with grain yield and grain size

Genetics of micronutrients and their relationships with grain yield and other traits have a direct bearing on devising effective strategies for breeding biofortified crop cultivars. A line × tester study of 196 hybrids and their 28 parental lines of pearl millet (Pennisetum glaucum (L.) R.Br.) showe...

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Autores principales: Kanatti, Anand, Rai, Kedar N, Radhika, Kommineni, Govindaraj, Mahalingam, Sahrawat, Kanwar L, Rao, Aluri S
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer International Publishing 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4320223/
https://www.ncbi.nlm.nih.gov/pubmed/25674488
http://dx.doi.org/10.1186/2193-1801-3-763
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author Kanatti, Anand
Rai, Kedar N
Radhika, Kommineni
Govindaraj, Mahalingam
Sahrawat, Kanwar L
Rao, Aluri S
author_facet Kanatti, Anand
Rai, Kedar N
Radhika, Kommineni
Govindaraj, Mahalingam
Sahrawat, Kanwar L
Rao, Aluri S
author_sort Kanatti, Anand
collection PubMed
description Genetics of micronutrients and their relationships with grain yield and other traits have a direct bearing on devising effective strategies for breeding biofortified crop cultivars. A line × tester study of 196 hybrids and their 28 parental lines of pearl millet (Pennisetum glaucum (L.) R.Br.) showed large genetic variability for Fe and Zn densities with predominantly additive gene action and no better-parent heterosis. Hybrids with high levels of Fe and Zn densities, involved both parental lines having significant positive general combining ability (GCA), and there were highly significant and high positive correlations between performance per se of parental lines and their GCAs. There was highly significant and high positive correlation between the Fe and Zn densities, both for performance per se and GCA. Fe and Zn densities had highly significant and negative, albeit weak, correlations with grain yield and highly significant and moderate positive correlation with grain weight in hybrids. These correlations, however, were non-significant in the parental lines. Thus, to breed hybrids with high Fe and Zn densities would require incorporating these micronutrients in both parental lines. Also, simultaneous selection for Fe and Zn densities based on performance per se would be highly effective in selecting for GCA. Breeding for high Fe and Zn densities with large grain size will be highly effective. However, combining high levels of these micronutrients with high grain yield would require growing larger breeding populations and progenies than breeding for grain yield alone, to make effective selection for desirable recombinants. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1186/2193-1801-3-763) contains supplementary material, which is available to authorized users.
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spelling pubmed-43202232015-02-11 Grain iron and zinc density in pearl millet: combining ability, heterosis and association with grain yield and grain size Kanatti, Anand Rai, Kedar N Radhika, Kommineni Govindaraj, Mahalingam Sahrawat, Kanwar L Rao, Aluri S Springerplus Research Genetics of micronutrients and their relationships with grain yield and other traits have a direct bearing on devising effective strategies for breeding biofortified crop cultivars. A line × tester study of 196 hybrids and their 28 parental lines of pearl millet (Pennisetum glaucum (L.) R.Br.) showed large genetic variability for Fe and Zn densities with predominantly additive gene action and no better-parent heterosis. Hybrids with high levels of Fe and Zn densities, involved both parental lines having significant positive general combining ability (GCA), and there were highly significant and high positive correlations between performance per se of parental lines and their GCAs. There was highly significant and high positive correlation between the Fe and Zn densities, both for performance per se and GCA. Fe and Zn densities had highly significant and negative, albeit weak, correlations with grain yield and highly significant and moderate positive correlation with grain weight in hybrids. These correlations, however, were non-significant in the parental lines. Thus, to breed hybrids with high Fe and Zn densities would require incorporating these micronutrients in both parental lines. Also, simultaneous selection for Fe and Zn densities based on performance per se would be highly effective in selecting for GCA. Breeding for high Fe and Zn densities with large grain size will be highly effective. However, combining high levels of these micronutrients with high grain yield would require growing larger breeding populations and progenies than breeding for grain yield alone, to make effective selection for desirable recombinants. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1186/2193-1801-3-763) contains supplementary material, which is available to authorized users. Springer International Publishing 2014-12-26 /pmc/articles/PMC4320223/ /pubmed/25674488 http://dx.doi.org/10.1186/2193-1801-3-763 Text en © Kanatti et al.; licensee Springer. 2014 This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited.
spellingShingle Research
Kanatti, Anand
Rai, Kedar N
Radhika, Kommineni
Govindaraj, Mahalingam
Sahrawat, Kanwar L
Rao, Aluri S
Grain iron and zinc density in pearl millet: combining ability, heterosis and association with grain yield and grain size
title Grain iron and zinc density in pearl millet: combining ability, heterosis and association with grain yield and grain size
title_full Grain iron and zinc density in pearl millet: combining ability, heterosis and association with grain yield and grain size
title_fullStr Grain iron and zinc density in pearl millet: combining ability, heterosis and association with grain yield and grain size
title_full_unstemmed Grain iron and zinc density in pearl millet: combining ability, heterosis and association with grain yield and grain size
title_short Grain iron and zinc density in pearl millet: combining ability, heterosis and association with grain yield and grain size
title_sort grain iron and zinc density in pearl millet: combining ability, heterosis and association with grain yield and grain size
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4320223/
https://www.ncbi.nlm.nih.gov/pubmed/25674488
http://dx.doi.org/10.1186/2193-1801-3-763
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