Genetic Variability, Genotype × Environment Interaction, Correlation, and GGE Biplot Analysis for Grain Iron and Zinc Concentration and Other Agronomic Traits in RIL Population of Sorghum (Sorghum bicolor L. Moench)

Phuke, R M and Anuradha, K and Radhika, K and Jabeen, F and Anuradha, G and Ramesh, T and Hariprasanna, K and Mehtre, S P and Deshpande, S P and Anil, G and Das, R R and Rathore, A and Hash, C T and Reddy, B V S and Ashok Kumar, A (2017) Genetic Variability, Genotype × Environment Interaction, Correlation, and GGE Biplot Analysis for Grain Iron and Zinc Concentration and Other Agronomic Traits in RIL Population of Sorghum (Sorghum bicolor L. Moench). Frontiers in Plant Science, 8 (712). pp. 1-13. ISSN 1664-462X

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Abstract

The low grain iron and zinc densities are well documented problems in food crops, affecting crop nutritional quality especially in cereals. Sorghum is a major source of energy and micronutrients for majority of population in Africa and central India. Understanding genetic variation, genotype × environment interaction and association between these traits is critical for development of improved cultivars with high iron and zinc. A total of 336 sorghum RILs (Recombinant Inbred Lines) were evaluated for grain iron and zinc concentration along with other agronomic traits for 2 years at three locations. The results showed that large variability exists in RIL population for both micronutrients (Iron = 10.8 to 76.4 mg kg−1 and Zinc = 10.2 to 58.7 mg kg−1, across environments) and agronomic traits. Genotype × environment interaction for both micronutrients (iron and zinc) was highly significant. GGE biplots comparison for grain iron and zinc showed greater variation across environments. The results also showed that G × E was substantial for grain iron and zinc, hence wider testing needed for taking care of G × E interaction to breed micronutrient rich sorghum lines. Iron and zinc concentration showed high significant positive correlation (across environment = 0.79; p < 0.01) indicating possibility of simultaneous effective selection for both the traits. The RIL population showed good variability and high heritabilities (>0.60, in individual environments) for Fe and Zn and other traits studied indicating its suitability to map QTL for iron and zinc.

Item Type: Article
Divisions: UNSPECIFIED
CRP: UNSPECIFIED
Uncontrolled Keywords: Sorghum, micronutrients, iron and zinc, recombinant inbred lines, genotype × environment interaction, GGE biplot
Subjects: Mandate crops > Sorghum
Others > Genetics and Genomics
Depositing User: Mr Ramesh K
Date Deposited: 08 May 2017 06:13
Last Modified: 02 Mar 2018 09:43
URI: http://oar.icrisat.org/id/eprint/9985
Official URL: http://dx.doi.org/10.3389/fpls.2017.00712
Projects: UNSPECIFIED
Funders: UNSPECIFIED
Acknowledgement: We would like to acknowledge Department of Biotechnology (DBT) Govt. of India for funding this project. We also like to acknowledge Charles Renard Analytical Laboratory for analyzing grain iron and zinc concentration of samples.
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