DArTseq SNP-based markers revealed high genetic diversity and population structure in avocado (<i>Persea americana</i> Mill.) germplasm collections from southern Ethiopia

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41340%2F25%3A103240" target="_blank" >RIV/60460709:41340/25:103240 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1007/s10722-025-02593-8" target="_blank" >https://doi.org/10.1007/s10722-025-02593-8</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10722-025-02593-8" target="_blank" >10.1007/s10722-025-02593-8</a>

Result language

angličtina

Original language name

DArTseq SNP-based markers revealed high genetic diversity and population structure in avocado (<i>Persea americana</i> Mill.) germplasm collections from southern Ethiopia

Original language description

In Ethiopia, avocado trees have been grown for over 80 years and have adapted to a wide range of topography, habitats, and climates; thus, the country is believed to harbor a high genetic diversity of avocados, but this has not yet been efficiently exploited. Hence, the primary aim of this study was to determine the extent and pattern of genetic diversity and population structure in avocado germplasm collections using single nucleotide polymorphism (SNP) markers. In our study, we genotyped a unique diversity panel of 267 avocado collections, which were collected from the first introduction center of avocados in Ethiopia (Sidama) and the Gedeo and Wolayta zones. The genomic DNA (50-100 ng/ul) was extracted from young leaves using the NucleoMag (R) Plant Extraction Kit. Next-generation sequencing was carried out using the Illumina HiSeq 2500 platform. A total of 2456 codominant SNPs were produced for the 267 avocado genotypes. Our results revealed that chromosome 1 had the highest number of mapped SNPs, whereas chromosomes 4, 10, and 11 had the lowest numbers of avocado references. The findings of this study showed that the average gene diversity, polymorphism information content, minor allelic frequency, and observed heterozygosity across all loci were 0.41, 0.32, 0.32, and 0.33, respectively, suggested the presence of a high genetic variation in avocado genotypes. Analysis of molecular variance (AMOVA) showed that only 6.55% of genetic variation existed among populations, 30.29% existed among individuals, and 63.16% existed within individuals. In addition, approximately 1.88%, 34.36%, and 63.76% of the molecular variance between altitudes, between samples within altitudes, and within samples, respectively, was based on the two altitudinal groups. Based on AMOVA, low- (FST = 0.02) and moderate-level genetic variations (FST = 0.07) were detected among the two altitudinal groups and studied populations, respectively, indicating the presence of a population structure. The Bayesian information criterion, discriminant analysis of principal components, and phylogenetic trees were grouped the studied avocado genotypes into five or six clusters. This high differentiation among germplasm suggests a significant genetic distance between these groups, which could pose challenges in breeding programs and offer opportunities for novel trait combinations. In conclusion, these findings fill gaps in our understanding of the molecular diversity and genetic structure of avocado germplasm and will serve as the foundation for future research on the development of crops to meet Ethiopian market demands.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

40106 - Agronomy, plant breeding and plant protection; (Agricultural biotechnology to be 4.4)

Project

—

Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Genetic Resources and Crop Evolution

ISSN

0925-9864

e-ISSN

0925-9864

Volume of the periodical

72

Issue of the periodical within the volume

1

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

26

Pages from-to

83-108

UT code for WoS article

001546839600001

EID of the result in the Scopus database

2-s2.0-105012930778