Diversity of ecotypes of five species of ryegrass from Northwestern Spain by phenotypic traits and microsatellites.

Germplasm bank Local cultivars Morphology Simple sequence repeats (SSRs) Variability

Journal

BMC plant biology
ISSN: 1471-2229
Titre abrégé: BMC Plant Biol
Pays: England
ID NLM: 100967807

Informations de publication

Date de publication:
03 Aug 2024
Historique:
received: 04 03 2024
accepted: 22 07 2024
medline: 3 8 2024
pubmed: 3 8 2024
entrez: 2 8 2024
Statut: epublish

Résumé

The Agricultural Research Centre of Mabegondo (Xunta de Galicia, A Coruña, Spain) conserves one of the most important collections of phytogenetic resources of ecotypes and natural populations of grassland species from northwestern Spain, among them populations of ryegrass (Lolium spp.), one of the most cultivated forage grasses in the world. The objective of the present study was to evaluate the diversity among commercial cultivars and natural ryegrass populations with phenotypic traits and molecular markers. Eleven polymorphic microsatellites loci were used to analyze 58 ecotypes and 10 cultivars (680 DNA samples in total) differentiating 673 genotypes. Two main groups were detected by the Structure analysis, one related to Lolium perenne and a second to Lolium multiflorum. The first group showed two subgroups and the second three. The cluster of L. multiflorum showed two subgroups not related with the third cluster including commercial varieties, one from the Canary Islands (with Lolium rigidum included) and a second one from northwestern Spain, which presented specific agromorphological characteristics, such as lower FES (number of days from 1 January, when three heads per plant were flowering per plot), CRE (growth in flowering, in g of dry matter), and AIN (number of inflorescences per plant). This is the first time that a large amount of data on ryegrass from the Iberian Peninsula has been analyzed, obtaining a clear genetic differentiation of the autochthonous varieties from the commercial varieties analyzed. In addition, the genetic structure found in the ecotypes was related to the phenotypic variation analyzed. Being of interest in the conservation of biodiversity and in obtaining better adapted varieties of ryegrasses, due to their specific phenotypic traits, such as a lower FES, CRE and AIN.

Sections du résumé

BACKGROUND BACKGROUND
The Agricultural Research Centre of Mabegondo (Xunta de Galicia, A Coruña, Spain) conserves one of the most important collections of phytogenetic resources of ecotypes and natural populations of grassland species from northwestern Spain, among them populations of ryegrass (Lolium spp.), one of the most cultivated forage grasses in the world. The objective of the present study was to evaluate the diversity among commercial cultivars and natural ryegrass populations with phenotypic traits and molecular markers.
RESULTS RESULTS
Eleven polymorphic microsatellites loci were used to analyze 58 ecotypes and 10 cultivars (680 DNA samples in total) differentiating 673 genotypes. Two main groups were detected by the Structure analysis, one related to Lolium perenne and a second to Lolium multiflorum. The first group showed two subgroups and the second three. The cluster of L. multiflorum showed two subgroups not related with the third cluster including commercial varieties, one from the Canary Islands (with Lolium rigidum included) and a second one from northwestern Spain, which presented specific agromorphological characteristics, such as lower FES (number of days from 1 January, when three heads per plant were flowering per plot), CRE (growth in flowering, in g of dry matter), and AIN (number of inflorescences per plant).
CONCLUSIONS CONCLUSIONS
This is the first time that a large amount of data on ryegrass from the Iberian Peninsula has been analyzed, obtaining a clear genetic differentiation of the autochthonous varieties from the commercial varieties analyzed. In addition, the genetic structure found in the ecotypes was related to the phenotypic variation analyzed. Being of interest in the conservation of biodiversity and in obtaining better adapted varieties of ryegrasses, due to their specific phenotypic traits, such as a lower FES, CRE and AIN.

Identifiants

pubmed: 39095701
doi: 10.1186/s12870-024-05440-7
pii: 10.1186/s12870-024-05440-7
doi:

Types de publication

Journal Article

Langues

eng

Sous-ensembles de citation

IM

Pagination

740

Subventions

Organisme : European Agricultural Fund for Rural Development
ID : RRFF 2019 12/15/11/250319/02 M10.22
Organisme : European Social Fund Plus
ID : DOC-INIA-CCAA (CONV. 2015)

Informations de copyright

© 2024. The Author(s).

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Auteurs

Cristina Isabel Fernández-Otero (CI)

Department of Crop Production, Centro de Investigaciones Agrarias de Mabegondo (CIAM), AGACAL, La Coruña, 15080, Spain. cristina.fernandez.otero@xunta.gal.

Ana María Ramos-Cabrer (AM)

Department of Crop Production and Engineering Projects, Campus Terra, Universidade de Santiago de Compostela, Lugo, 27002, Spain.

Santiago Pereira-Lorenzo (S)

Department of Crop Production and Engineering Projects, Campus Terra, Universidade de Santiago de Compostela, Lugo, 27002, Spain.

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