Local adaptation, genetic diversity and key environmental interactions in a collection of novel red clover germplasm
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Le résumé fourni par la source
Red clover ( Trifolium pratense L.) is known for its large taproot, nitrogen fixation capabilities and production of forage high in protein and digestibility. It has the potential to strengthen temperate pastural systems against future adverse climatic events by providing higher biomass during periods of water deficit. Being outcrossing and self-incompatible, red clover is a highly heterozygous species. If evaluated and utilized correctly, this genetic diversity can be harnessed to develop productive, persistent cultivars. In this study, we selected 92 geographically diverse red clover novel germplasm populations for assessment in multi-location, multi-year field trials and for genetic diversity and genetic relationship characterization using pooled genotyping-by-sequencing (GBS). Through the development of integrated linear mixed models based on genomic, phenotypic, and environmental information we assessed variance components and genotype-by-environment (G x E) interactions for eight physiological and morphological traits. Key interactions between environmental variables and plant performance were also evaluated using a common garden site at Lincoln. We found that the genetic structure of the 92 populations was highly influenced by country of origin. The expected heterozygosity within populations ranged between 0.08 and 0.17 and varied with geographical origin. For the eight physiological and morphological traits measured there was high narrow-sense heritability ( h 2 > 0.70). The influence of environmental variables, such as mean precipitation, temperature and isothermality of the original collection locations, on plant and trait performance in the local field trials was also highlighted. Along with the identification of genes associated with these bioclimatic variables that could be used as genetic markers for selection in future breeding programs. Our study identifies the importance of diverse germplasm when adding genetic variation into breeding programs. It also identifies efficient evaluation methods and key climatic variables that should be considered when developing adaptive red clover cultivars.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Local adaptation, genetic diversity and key environmental interactions in a collection of novel red clover germplasm
- Date Crossref
- 17/03/2025
- Éditeur
- Frontiers Media SA
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Lincoln University pays non établi dans la noticeUniversité ou école supérieure
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AgResearch pays non établi dans la noticeOrganisme public
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University of Canterbury Building EN27 pays non établi dans la noticeUniversité ou école supérieure
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PGG Wrightson Seeds (New Zealand) pays non établi dans la noticeEntreprise
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The University of Queensland pays non établi dans la noticeUniversité ou école supérieure
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Agriculture and Food pays non établi dans la noticeStructure de recherche
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Lincoln Research Centre AgResearch Limited pays non établi dans la noticeStructure de recherche
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Faculty of Agriculture and Life Sciences pays non établi dans la noticeUniversité ou école supérieure
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C/- Grasslands Research Centre PGG Wrightson Seeds Limited pays non établi dans la noticeStructure de recherche
Lincoln University, AgResearch et Building EN27 — University of Canterbury, avec 6 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.