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Tracing the geographic origins of major avocado cultivars.

The Journal of heredity ·Vol. 100 ·No. 1 ·2009-00-00 ·Pages 56-65

Chen H, Morrell PL, Ashworth VE, de la Cruz M, Clegg MT

Abstract

It has been difficult to infer the genetic history of avocado breeding, owing to the role of hybridization in the origin of contemporary avocado cultivars. To address this difficulty, we used the model-based clustering program, STRUCTURE, and nucleotide polymorphism in 5960 bp of sequence from 4 nuclear loci to examine population structure in 21 wild avocado accessions. The origins of 33 cultivars were inferred relative to the wild sample. Nucleotide sequence diversity in domesticated avocados ranged between 80% and 90% of that observed for the same loci in wild avocado, depending on the diversity statistic used for comparison. Substantial genetic differentiation among 3 geographic groups of wild germplasm corresponded to the classically defined horticultural races of avocado. Previously undetected genetic differentiation was revealed in wild populations from Central Mexico, where 2 subpopulations were distinguished based on elevation and latitude.

MeSH Terms

Base Sequence Gene Flow Genetic Variation/genetics Genetics, Population Genome, Plant Geography Haplotypes Mexico Molecular Sequence Data Persea/genetics Polymorphism, Genetic

Authors & Affiliations

5 authors, click to expand affiliations / ORCID

Chen Haofeng

Department of Ecology and Evolutionary Biology, University of California, Irvine, CA 92697, USA.

Morrell Peter L

Ashworth Vanessa E T M

de la Cruz Marlene

Clegg Michael T

Article Info

Journal

The Journal of heredity

Abbr.

J Hered

ISSN

1465-7333

DOI

10.1093/jhered/esn068

Published

2009-00-00

Epub

2008-00-08

Pages

56-65

Language

English

Region

United States

NLM ID

0375373

Subset

Databases

GENBANK

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PubMed source DOI: 10.1093/jhered/esn068 View journal details

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Tracing the geographic origins of major avocado cultivars.

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