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Title: Potential of Genomic Selection in Mass Selection Breeding of an Allogamous Crop: An Empirical Study to Increase Yield of Common Buckwheat
Authors: Yabe, Shiori
Hara, Takashi
Ueno, Mariko
Enoki, Hiroyuki
Kimura, Tatsuro
Nishimura, Satoru
Yasui, Yasuo  kyouindb  KAKEN_id
Ohsawa, Ryo
Iwata, Hiroyoshi
Author's alias: 矢部, 志央理
原, 尚資
上野, まりこ
榎, 宏征
木村, 達郎
西村, 哲
安井, 康夫
大澤, 良
岩田, 洋佳
Keywords: genomic selection
common buckwheat
phenotypic selection
selection index
allogamous plant species
Issue Date: 21-Mar-2018
Publisher: Frontiers Media SA
Journal title: Frontiers in Plant Science
Volume: 9
Thesis number: 276
Abstract: To evaluate the potential of genomic selection (GS), a selection experiment with GS and phenotypic selection (PS) was performed in an allogamous crop, common buckwheat (Fagopyrum esculentum Moench). To indirectly select for seed yield per unit area, which cannot be measured on a single-plant basis, a selection index was constructed from seven agro-morphological traits measurable on a single plant basis. Over 3 years, we performed two GS and one PS cycles per year for improvement in the selection index. In GS, a prediction model was updated every year on the basis of genotypes of 14, 598–50, 000 markers and phenotypes. Plants grown from seeds derived from a series of generations of GS and PS populations were evaluated for the traits in the selection index and other yield-related traits. GS resulted in a 20.9% increase and PS in a 15.0% increase in the selection index in comparison with the initial population. Although the level of linkage disequilibrium in the breeding population was low, the target trait was improved with GS. Traits with higher weights in the selection index were improved more than those with lower weights, especially when prediction accuracy was high. No trait changed in an unintended direction in either GS or PS. The accuracy of genomic prediction models built in the first cycle decreased in the later cycles because the genetic bottleneck through the selection cycles changed linkage disequilibrium patterns in the breeding population. The present study emphasizes the importance of updating models in GS and demonstrates the potential of GS in mass selection of allogamous crop species, and provided a pilot example of successful application of GS to plant breeding.
Description: 普通ソバの収量性改良へのゲノミックセレクションの実証 --DNAの情報を用いて、他殖性作物の高速育種に貢献--. 京都大学プレスリリース. 2018-06-15.
Rights: © 2018 Yabe, Hara, Ueno, Enoki, Kimura, Nishimura, Yasui, Ohsawa and Iwata. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
DOI(Published Version): 10.3389/fpls.2018.00276
PubMed ID: 29619035
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