Breeding New Premium Quality Cultivars by Citrus Breeding 2.0 in Japan: An Integrative Approach Suggested by Genealogy

Developing varieties with diverse features that satisfy varied commercial needs, improving overall fruit quality, and quickly releasing them, are prerequisites in citrus breeding. However, these three goals require trade-offs in conventional breeding, even with the application of the marker-assisted...

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Main Author: Tokurou Shimizu
Format: Article
Language:English
Published: MDPI AG 2022-06-01
Series:Horticulturae
Subjects:
Online Access:https://www.mdpi.com/2311-7524/8/6/559
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author Tokurou Shimizu
author_facet Tokurou Shimizu
author_sort Tokurou Shimizu
collection DOAJ
description Developing varieties with diverse features that satisfy varied commercial needs, improving overall fruit quality, and quickly releasing them, are prerequisites in citrus breeding. However, these three goals require trade-offs in conventional breeding, even with the application of the marker-assisted selection technique. Conventional breeding cannot achieve these three goals simultaneously and it has been regarded as a breeding trilemma. Integrating a genomics-assisted breeding (GAB) approach that relies on quantitative trait locus detection by genome-wide association study and genome-wide prediction of a trait by genomic selection using enriched marker genotypes enhances breeding efficiency and contributes to eliminating the trilemma. Besides these efforts, the analysis of the genealogy of indigenous citrus varieties revealed that many high-quality indigenous varieties were selected within a few generations. It suggested that selecting a new premium quality hybrid is possible by integrating it with the GAB technique and helps avoid the trilemma. This review describes how a new approach, “Citrus Breeding 2.0” works for rapidly developing new, premium quality hybrids and introduces three applications of this technique, specifically, rebreeding, complementary breeding, and mimic breeding based on the ongoing citrus breeding program in NARO, Japan.
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spelling doaj.art-99358858513c494dbe132a02148850c42023-11-23T16:56:06ZengMDPI AGHorticulturae2311-75242022-06-018655910.3390/horticulturae8060559Breeding New Premium Quality Cultivars by Citrus Breeding 2.0 in Japan: An Integrative Approach Suggested by GenealogyTokurou Shimizu0Division of Citrus Research, Institute of Fruit Tree and Tea Science, National Agriculture and Food Research Organization, Shimizu, Shizuoka 424-0292, JapanDeveloping varieties with diverse features that satisfy varied commercial needs, improving overall fruit quality, and quickly releasing them, are prerequisites in citrus breeding. However, these three goals require trade-offs in conventional breeding, even with the application of the marker-assisted selection technique. Conventional breeding cannot achieve these three goals simultaneously and it has been regarded as a breeding trilemma. Integrating a genomics-assisted breeding (GAB) approach that relies on quantitative trait locus detection by genome-wide association study and genome-wide prediction of a trait by genomic selection using enriched marker genotypes enhances breeding efficiency and contributes to eliminating the trilemma. Besides these efforts, the analysis of the genealogy of indigenous citrus varieties revealed that many high-quality indigenous varieties were selected within a few generations. It suggested that selecting a new premium quality hybrid is possible by integrating it with the GAB technique and helps avoid the trilemma. This review describes how a new approach, “Citrus Breeding 2.0” works for rapidly developing new, premium quality hybrids and introduces three applications of this technique, specifically, rebreeding, complementary breeding, and mimic breeding based on the ongoing citrus breeding program in NARO, Japan.https://www.mdpi.com/2311-7524/8/6/559citrus breedingmarker-assisted selectiongenomics-assisted breedinggenome-wide association studygenomic selectiongenealogy
spellingShingle Tokurou Shimizu
Breeding New Premium Quality Cultivars by Citrus Breeding 2.0 in Japan: An Integrative Approach Suggested by Genealogy
Horticulturae
citrus breeding
marker-assisted selection
genomics-assisted breeding
genome-wide association study
genomic selection
genealogy
title Breeding New Premium Quality Cultivars by Citrus Breeding 2.0 in Japan: An Integrative Approach Suggested by Genealogy
title_full Breeding New Premium Quality Cultivars by Citrus Breeding 2.0 in Japan: An Integrative Approach Suggested by Genealogy
title_fullStr Breeding New Premium Quality Cultivars by Citrus Breeding 2.0 in Japan: An Integrative Approach Suggested by Genealogy
title_full_unstemmed Breeding New Premium Quality Cultivars by Citrus Breeding 2.0 in Japan: An Integrative Approach Suggested by Genealogy
title_short Breeding New Premium Quality Cultivars by Citrus Breeding 2.0 in Japan: An Integrative Approach Suggested by Genealogy
title_sort breeding new premium quality cultivars by citrus breeding 2 0 in japan an integrative approach suggested by genealogy
topic citrus breeding
marker-assisted selection
genomics-assisted breeding
genome-wide association study
genomic selection
genealogy
url https://www.mdpi.com/2311-7524/8/6/559
work_keys_str_mv AT tokuroushimizu breedingnewpremiumqualitycultivarsbycitrusbreeding20injapananintegrativeapproachsuggestedbygenealogy