Genome-enabled predictions for fruit weight and quality from repeated records in European peach progenies

Publication Overview
TitleGenome-enabled predictions for fruit weight and quality from repeated records in European peach progenies
AuthorsBiscarini F, Nazzicari N, Bink M, Arús P, Aranzana MJ, Verde I, Micali S, Pascal T, Quilot-Turion B, Lambert P, da Silva Linge C, Pacheco I, Bassi D, Stella A, Rossini L
TypeJournal Article
Journal NameBMC genomics
Volume18
Issue1
Year2017
Page(s)432
CitationBiscarini F, Nazzicari N, Bink M, Arús P, Aranzana MJ, Verde I, Micali S, Pascal T, Quilot-Turion B, Lambert P, da Silva Linge C, Pacheco I, Bassi D, Stella A, Rossini L. Genome-enabled predictions for fruit weight and quality from repeated records in European peach progenies. BMC genomics. 2017 Jun 06; 18(1):432.

Abstract

BACKGROUND
Highly polygenic traits such as fruit weight, sugar content and acidity strongly influence the agroeconomic value of peach varieties. Genomic Selection (GS) can accelerate peach yield and quality gain if predictions show higher levels of accuracy compared to phenotypic selection. The available IPSC 9K SNP array V1 allows standardized and highly reliable genotyping, preparing the ground for GS in peach.

RESULTS
A repeatability model (multiple records per individual plant) for genome-enabled predictions in eleven European peach populations is presented. The analysis included 1147 individuals derived from both commercial and non-commercial peach or peach-related accessions. Considered traits were average fruit weight (FW), sugar content (SC) and titratable acidity (TA). Plants were genotyped with the 9K IPSC array, grown in three countries (France, Italy, Spain) and phenotyped for 3-5 years. An analysis of imputation accuracy of missing genotypic data was conducted using the software Beagle, showing that two of the eleven populations were highly sensitive to increasing levels of missing data. The regression model produced, for each trait and each population, estimates of heritability (FW:0.35, SC:0.48, TA:0.53, on average) and repeatability (FW:0.56, SC:0.63, TA:0.62, on average). Predictive ability was estimated in a five-fold cross validation scheme within population as the correlation of true and predicted phenotypes. Results differed by populations and traits, but predictive abilities were in general high (FW:0.60, SC:0.72, TA:0.65, on average).

CONCLUSIONS
This study assessed the feasibility of Genomic Selection in peach for highly polygenic traits linked to yield and fruit quality. The accuracy of imputing missing genotypes was as high as 96%, and the genomic predictive ability was on average 0.65, but could be as high as 0.84 for fruit weight or 0.83 for titratable acidity. The estimated repeatability may prove very useful in the management of the typical long cycles involved in peach productions. All together, these results are very promising for the application of genomic selection to peach breeding programmes.

Properties
Additional details for this publication include:
Property NameValue
Journal AbbreviationBMC Genomics
DOI10.1186/s12864-017-3781-8
Elocation10.1186/s12864-017-3781-8
Publication ModelElectronic
ISSN1471-2164
eISSN1471-2164
Publication Date2017 Jun 06
Journal CountryEngland
LanguageEnglish
Language Abbreng
Publication TypeJournal Article
Cross References
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DatabaseAccession
PMID: PubMedPMID:28583089