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Genetic Diversity and Stability of Performance of Wheat Population Varieties Developed by Participatory Breeding

Gaëlle van Frank,Pierre Rivière,Sophie Pin,Raphaël Baltassat,Jean-François Berthellot,François Caizergues,C. Dalmasso,J. Gascuel,Alexandre Hyacinthe,F. Mercier,Hélène Montaz,B. Ronot,I. Goldringer

Published 2020 in Sustainability

ABSTRACT

Modern agricultural systems rely on reduced crop genetic diversity, due in particular to the use of homogeneous elite varieties grown in large areas. However, genetic diversity within fields is a lever for a more sustainable production, allowing greater stability and resistance to biotic and abiotic stresses. In France, a Participatory Plant Breeding (PPB) project on bread wheat, involving farmers, facilitators and researchers, has led to the development of heterogeneous populations whose within-variety genetic diversity is expected to confer the ability to adapt to farmers’ practices and environments. We studied the stability and local adaptation of ten of these farmers’ populations as well as two commercial varieties in relation to their within-variety genetic diversity. Although no clear evidence of local adaptation was detected, we found that populations’ grain yield and protein content were more stable over space and time respectively than those of commercial varieties. Moreover, the varieties’ stability over time in terms of protein content was positively correlated with within-variety genetic diversity with no significant drawback on protein yield. These results demonstrate the wide adaptive potential of PPB populations, highlighting the importance of seed exchange networks for agrobiodiversity management and use. They emphasize the benefits of genetic diversity for stability over time, which is of great interest to farmers.

PUBLICATION RECORD

  • Publication year

    2020

  • Venue

    Sustainability

  • Publication date

    2020-01-03

  • Fields of study

    Agricultural and Food Sciences, Biology

  • Identifiers
    DOI 10.3390/su12010384
  • External record

    Open on Semantic Scholar

  • Source metadata

    Semantic Scholar

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