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对果果品质特征的全基因组选择:从预测和后述中获得的育种见解

Sarah A Kostick¹, Rex Bernardo², James J Luby¹

¹Department of Horticultural Science, University of Minnesota, Saint Paul, MN 55108, USA.

Horticulture research

|June 19, 2023

概括

基因组选择有效地预测了果的水果质量,有助于繁殖计划. 这种方法使用遗传标记来改善长寿果树的特征,如果 (Malus domestica).

科学领域:

植物遗传学植物遗传学
农业科学农业科学
园艺园艺园艺园艺

背景情况:

果 (Malus domestica) 的水果质量特征是复杂的,由多个定量特征位点 (QTLs) 控制.
基因组选择 (GS) 提供了一种潜在的策略,用于改善长代木质多年作物的这些特征.

研究的目的:

在果种子育种计划中评估基因组预测水果质量特征的有效性.
评估各种因素对果育种预测能力的影响.

主要方法:

分析了一组多样化的果生殖质 (955个) 与高密度SNP数据 (977个SNP) 的分析.
将基因组预测模型应用于收获时收集的水果质量特征数据.
研究影响预测能力的因素,包括特征类型,数据集组成,家族结构和SNP分布.

主要成果:

大多数水果品质特征的预测能力均为中等至高,平均预测能力在0.35至0.54之间.
预测能力受到特征,训练/测试组合组成,家族内预测策略和每染色体SNP密度的影响.
将大效应的QTL纳入固定效应中,改善了诸如百分比红色覆盖颜色等特征的预测.

结论:

基因组选择是一种可行的和有效的育种方法,用于增强果 (Malus domestica) 的特定水果质量特征.
这项研究提供了证据,支持GS在加速多年果作物复杂特征的遗传收益方面的实用性.

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