Articles
KIWIFRUIT BREEDING: FROM THE PHENOTYPIC ANALYSIS OF PARENTS TO THE GENOMIC ESTIMATION OF THEIR BREEDING VALUE (GEBV)
Article number
913_14
Pages
123 – 130
Language
English
Abstract
Kiwifruit breeding has been supported in the past by the genetic analysis of breeding value of parents based on dissection of the components of variance.
Data were collected from biparental mating designs such as the North Carolina Model 2 (NCM2) that is well suited to dioecious species such as kiwifruit.
In the last decade we assisted the first attempts to apply marker-assisted selection (MAS) to traits such as gender and others characterised by simple Mendelian inheritance.
The rapid evolution of molecular markers, the current development of large sets of them, of the order of tens of thousands, and the declining cost of large-scale genotyping, including de novo sequencing of individuals through next generation sequencing (NGS), recently opened the way to more ambitious goals, such as the rapid detection of marker-trait associations through the linkage disequilibrium (LD) approach and the estimation of the breeding value of genotypes based on the genome-wide high-density markers profile.
The development of robust decision making support tools for such genomic selection requires the development of training populations of individuals well characterized for both phenotypic and molecular profiles.
The latter topic together with the improvement of statistical models for predicting correlations between the true breeding value and its genomic estimate and the need to adopt adequate breeding programs conclude the discussion.
Frequent references to the main kiwifruit breeding programs link the theoretical discussion to the peculiarities of the kiwifruit crop.
Data were collected from biparental mating designs such as the North Carolina Model 2 (NCM2) that is well suited to dioecious species such as kiwifruit.
In the last decade we assisted the first attempts to apply marker-assisted selection (MAS) to traits such as gender and others characterised by simple Mendelian inheritance.
The rapid evolution of molecular markers, the current development of large sets of them, of the order of tens of thousands, and the declining cost of large-scale genotyping, including de novo sequencing of individuals through next generation sequencing (NGS), recently opened the way to more ambitious goals, such as the rapid detection of marker-trait associations through the linkage disequilibrium (LD) approach and the estimation of the breeding value of genotypes based on the genome-wide high-density markers profile.
The development of robust decision making support tools for such genomic selection requires the development of training populations of individuals well characterized for both phenotypic and molecular profiles.
The latter topic together with the improvement of statistical models for predicting correlations between the true breeding value and its genomic estimate and the need to adopt adequate breeding programs conclude the discussion.
Frequent references to the main kiwifruit breeding programs link the theoretical discussion to the peculiarities of the kiwifruit crop.
Publication
Authors
R. Testolin
Keywords
Actinidia, genetics, heritability, progeny test, combining ability
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