基因组选择与表型选择对开关草生物质产量的经验比较

IF 2 3区 农林科学 Q2 AGRONOMY Agronomy Journal Pub Date : 2024-07-22 DOI:10.1002/agj2.21639
Neal W. Tilhou, DoKyoung Lee, Guillaume P. Ramstein, Hari P. Poudel, Serge J. Edme, Michael D. Casler
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引用次数: 0

摘要

开关草(Panicum virgatum L.)是为支持生物燃料工业而作为生物质作物培育的多个草种之一。提高生物质产量是确保开关草等作物可持续满足该行业需求的当务之急。基因组选择是加快生物质产量等复杂性状育种收益的一种策略。本研究的目标是在先前训练有素的自由交换草群体中进行三个周期的基因组选育,并将其与一个周期的表型选育进行比较,两者都需要 3 年时间才能完成。采用四次重复的随机完全区组设计,在美国中部五个地点和三个耐寒区对先进品系进行了测试。基因型 × 地点之间存在强烈的交互作用,但在五个评估地点中的四个地点,前两代基因组选择优于自由选择。相反,在五个评估地点中,表型选择未能显著提高生物量产量。根据自由交换草的这些结果,基因组选育方法的生物量增产率预计至少比以前使用表型选育方法的估计值高一倍。
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Empirical comparison of genomic selection to phenotypic selection for biomass yield of switchgrass

Switchgrass (Panicum virgatum L.) is one of several grass species being bred for use as a biomass crop to support the biofuel industry. Increases in biomass yield are imperative to ensure that crops such as switchgrass can sustainably meet the needs of this industry. Genomic selection is one strategy that can accelerate breeding gains for complex traits such as biomass yield. The goal of this study was to conduct three cycles of genomic selection in a previously trained Liberty switchgrass population and compare that to one cycle of phenotypic selection, both of which required 3 years to complete. The advanced lines were tested across five locations and three hardiness zones in the Central United States using a randomized complete block design with four replicates. There were strong genotype × location interactions, but the first two generations of genomic selection were superior to Liberty at four of the five evaluation locations. Conversely, phenotypic selection failed to result in significant gains in biomass yield for any of the five evaluation locations. Based on these results from Liberty switchgrass, genomic selection methods are expected to at least double the rates of gain in biomass yield relative to previous estimates using phenotypic selection methods.

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来源期刊
Agronomy Journal
Agronomy Journal 农林科学-农艺学
CiteScore
4.70
自引率
9.50%
发文量
265
审稿时长
4.8 months
期刊介绍: After critical review and approval by the editorial board, AJ publishes articles reporting research findings in soil–plant relationships; crop science; soil science; biometry; crop, soil, pasture, and range management; crop, forage, and pasture production and utilization; turfgrass; agroclimatology; agronomic models; integrated pest management; integrated agricultural systems; and various aspects of entomology, weed science, animal science, plant pathology, and agricultural economics as applied to production agriculture. Notes are published about apparatus, observations, and experimental techniques. Observations usually are limited to studies and reports of unrepeatable phenomena or other unique circumstances. Review and interpretation papers are also published, subject to standard review. Contributions to the Forum section deal with current agronomic issues and questions in brief, thought-provoking form. Such papers are reviewed by the editor in consultation with the editorial board.
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