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A Genome-Wide Association Study of Biomass Yield and Feed Quality in Buffel Grass ( Cenchrus ciliaris L.)

Author

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  • Alemayehu Teressa Negawo

    (Feed and Forage Development Program, International Livestock Research Institute (ILRI), Addis Ababa P.O. Box 5689, Ethiopia)

  • Meki Shehabu Muktar

    (Feed and Forage Development Program, International Livestock Research Institute (ILRI), Addis Ababa P.O. Box 5689, Ethiopia)

  • Ricardo Alonso Sánchez Gutiérrez

    (Feed and Forage Development Program, International Livestock Research Institute (ILRI), Addis Ababa P.O. Box 5689, Ethiopia
    Instituto Nacional de Investigaciones Forestales Agrícolas y Pecuarias, Campo Experimental Zacatecas, Calera 98500, Zacatecas, Mexico)

  • Ermias Habte

    (Feed and Forage Development Program, International Livestock Research Institute (ILRI), Addis Ababa P.O. Box 5689, Ethiopia)

  • Alice Muchugi

    (Feed and Forage Development Program, International Livestock Research Institute (ILRI), Addis Ababa P.O. Box 5689, Ethiopia)

  • Chris S. Jones

    (Feed and Forage Development Program, International Livestock Research Institute (ILRI), Addis Ababa P.O. Box 5689, Ethiopia
    International Livestock Research Institute (ILRI), P.O. Box 30709, Nairobi 001000, Kenya)

Abstract

The development of modern genomic tools has helped accelerate genetic gains in the breeding program of food crops. More recently, genomic resources have been developed for tropical forages, providing key resources for developing new climate-resilient high-yielding forage varieties. In this study, we present a genome-wide association study for biomass yield and feed quality traits in buffel grass ( Cenchrus ciliaris L. aka Pennisetum ciliare L.). Genome-wide markers, generated using the DArTSeq platform and mapped onto the Setaria italica reference genome, were used for the genome-wide association study. The results revealed several markers associated with biomass yield and feed quality traits. A total of 78 marker–trait associations were identified with R 2 values ranging from 0.138 to 0.236. The marker–trait associations were distributed across different chromosomes. Of these associations, the most marker–trait associations (23) were observed on Chr9, followed by Chr5 with 12. The fewest number of marker–trait associations were observed on Chr4 with 2. In terms of traits, 17 markers were associated with biomass yield, 24 with crude protein, 26 with TDN, 14 with ADF, 10 with NDF and 6 with DMI. A total of 20 of the identified markers were associated with at least two traits. The identified marker–trait associations provide a useful genomic resource for the future improvement and breeding of buffel grass.

Suggested Citation

  • Alemayehu Teressa Negawo & Meki Shehabu Muktar & Ricardo Alonso Sánchez Gutiérrez & Ermias Habte & Alice Muchugi & Chris S. Jones, 2024. "A Genome-Wide Association Study of Biomass Yield and Feed Quality in Buffel Grass ( Cenchrus ciliaris L.)," Agriculture, MDPI, vol. 14(2), pages 1-27, February.
    • Handle: RePEc:gam:jagris:v:14:y:2024:i:2:p:257-:d:1333997
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    References listed on IDEAS

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    1. Matin Qaim, 2020. "Role of New Plant Breeding Technologies for Food Security and Sustainable Agricultural Development," Applied Economic Perspectives and Policy, John Wiley & Sons, vol. 42(2), pages 129-150, June.
    2. Xiaolei Liu & Meng Huang & Bin Fan & Edward S Buckler & Zhiwu Zhang, 2016. "Iterative Usage of Fixed and Random Effect Models for Powerful and Efficient Genome-Wide Association Studies," PLOS Genetics, Public Library of Science, vol. 12(2), pages 1-24, February.
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