Whole-genome resequencing of a global collection of Napier grass (Cenchrus purpureus) to explore global population structure and QTL governing yield and feed quality traits.

TESHOME, A.; LIRE, H.; HIGGINS, J.; OLANGO, T. M.; HABTE, E. H.; NEGAWO, A. T.; MUKTAR, M. S.; ASSEFA, Y.; PEREIRA, J. F.; AZEVEDO, A. L. S.; MACHADO, J. C.; NYAMONGO, D.; ZHANG, J.; QI, Y.; ANDERSON, W.; DE VEGA, J.; JONES, C. S.; ABEL TESHOME, INTERNATIONAL LIVESTOCK RESEARCH INSTITUTE; HAILU LIRE, ETHIOPIAN INSTITUTE OF AGRICULTURAL RESEARCH; JANET HIGGINS, EARLHAM INSTITUTE; TEMESGEN MAGULE OLANGO, ALMAVIVA; ERMIAS HAILE HABTE, INTERNATIONAL LIVESTOCK RESEARCH INSTITUTE; ALEMAYEHU TERESSA NEGAWO, INTERNATIONAL LIVESTOCK RESEARCH INSTITUTE; MEKI SHEHABU MUKTAR, INTERNATIONAL LIVESTOCK RESEARCH INSTITUTE; YILIKAL ASSEFA, INTERNATIONAL LIVESTOCK RESEARCH INSTITUTE; JORGE FERNANDO PEREIRA, CNPGL; ANA LUISA SOUSA AZEVEDO, CNPGL; JUAREZ CAMPOLINA MACHADO, CNPGL; DESTERIO NYAMONGO, KENYA AGRICULTURAL AND LIVESTOCK RESEARCH ORGANIZATION; JIYU ZHANG, LANZHOU UNIVERSITY; YAN QI, LANZHOU UNIVERSITY; WILLIAM ANDERSON, USDA; JOSE DE VEGA, EARLHAM INSTITUTE; CHRISTOPHER STEPHEN JONES, INTERNATIONAL LIVESTOCK RESEARCH INSTITUTE.

Whole-genome resequencing of a global collection of Napier grass (Cenchrus purpureus) to explore global population structure and QTL governing yield and feed quality traits.

2025

TESHOME, A. | LIRE, H. | HIGGINS, J. | OLANGO, T. M. | HABTE, E. H. | NEGAWO, A. T. | MUKTAR, M. S. | ASSEFA, Y. | PEREIRA, J. F. | AZEVEDO, A. L. S. | MACHADO, J. C. | NYAMONGO, D. | ZHANG, J. | QI, Y. | ANDERSON, W. | DE VEGA, J. | JONES, C. S. | ABEL TESHOME, INTERNATIONAL LIVESTOCK RESEARCH INSTITUTE; HAILU LIRE, ETHIOPIAN INSTITUTE OF AGRICULTURAL RESEARCH; JANET HIGGINS, EARLHAM INSTITUTE; TEMESGEN MAGULE OLANGO, ALMAVIVA; ERMIAS HAILE HABTE, INTERNATIONAL LIVESTOCK RESEARCH INSTITUTE; ALEMAYEHU TERESSA NEGAWO, INTERNATIONAL LIVESTOCK RESEARCH INSTITUTE; MEKI SHEHABU MUKTAR, INTERNATIONAL LIVESTOCK RESEARCH INSTITUTE; YILIKAL ASSEFA, INTERNATIONAL LIVESTOCK RESEARCH INSTITUTE; JORGE FERNANDO PEREIRA, CNPGL; ANA LUISA SOUSA AZEVEDO, CNPGL; JUAREZ CAMPOLINA MACHADO, CNPGL; DESTERIO NYAMONGO, KENYA AGRICULTURAL AND LIVESTOCK RESEARCH ORGANIZATION; JIYU ZHANG, LANZHOU UNIVERSITY; YAN QI, LANZHOU UNIVERSITY; WILLIAM ANDERSON, USDA; JOSE DE VEGA, EARLHAM INSTITUTE; CHRISTOPHER STEPHEN JONES, INTERNATIONAL LIVESTOCK RESEARCH INSTITUTE.

Napier grass (Cenchrus purpureus) is a C4 perennial grass species native to Sub-Saharan Africa and widely used as livestock feed in the region. In this study, we sequenced the genomes of 450 Napier grass individuals from 18 countries, identifying over 170 million DNA variants (SNPs and Indels). Approximately 1% of these SNPs were informative and used to assess genetic diversity within the collection. Our resequencing study provided valuable insights into the global genetic diversity of Napier grass. Additionally, a genome-wide association study on 2 independent populations identified multiple quantitative trait loci significantly associated with key agronomic traits, including biomass yield, nitrogen and cellulose content. These findings serve as a crucial resource for preserving and understanding Napier grass genetic diversity in the context of climate change. Moreover, they will support genomics-based breeding programs aimed at developing high-yielding and drought-tolerant varieties for forage and biofuel production.

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