Enhancing drought resistance in warm-season turfgrasses: Fourteen years of progress through a multistate collaborative project across the southern United States

IF 2 3区 农林科学 Q2 AGRONOMY
Crop Science Pub Date : 2024-11-18 DOI:10.1002/csc2.21393
Beatriz Tome Gouveia, Kevin E. Kenworthy, Ambika Chandra, Brian M. Schwartz, Jing Zhang, Paul L. Raymer, Yanqi Wu, Marta Pudzianowska, James Baird, Grady L. Miller, J. Bryan Unruh, Benjamin G. Wherley, Dennis L. Martin, Justin Q. Moss, Sameer Khanal, Susana Milla-Lewis
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引用次数: 0

Abstract

In turfgrass breeding, drought resistance is a primary trait for improvement due to scarcity and reduced quality of water for irrigation. Therefore, in 2010, the turfgrass breeding programs at six public universities joined efforts to address these challenges by cross evaluating breeding lines for the most economically significant warm-season turfgrass species in the southern United States through a United States Department of Agriculture-National Institute for Food and Agriculture Specialty Crop Research Initiative funded project. Three breeding cycles were associated with three completed (2010–2014, 2014–2019, and 2019–2024) collaborative grant projects, but the efficiency of this partnership in terms of gains from selection has not been measured. Our objectives were to (1) estimate the expected and realized genetic gain for drought resistance and turfgrass quality for three breeding cycles, (2) compare cultivars developed with support of the projects versus standard cultivars in a historical data analysis, and (3) compare genetic gain for traits assessed visually versus using small unmanned aircraft systems imagery, both in drought and non-drought environments. For these purposes, historical data were investigated with a retrospective analysis of project trials evaluated 2011–2024. Our findings for the realized genetic gain demonstrated progress in enhancing drought resistance in bermudagrass, St. Augustinegrass, seashore paspalum, and zoysiagrass. In addition, notable positive increments for this trait were documented for each cycle compared to the standard cultivars, particularly in bermudagrass, St. Augustinegrass, and zoysiagrass. While heritability was higher for visually assessed traits, genetic increments were more pronounced for imagery-assessed traits.
增强暖季型草坪草的抗旱性:美国南部多州合作项目十四年来取得的进展
在草坪草育种方面,由于灌溉用水稀缺和水质下降,抗旱性是需要改良的主要性状。因此,2010 年,六所公立大学的草坪草育种项目携手合作,通过美国农业部-国家食品与农业研究所特种作物研究计划资助项目,对美国南部最具经济意义的暖季型草坪草品种的育种品系进行交叉评估,以应对这些挑战。三个育种周期与三个已完成(2010-2014 年、2014-2019 年和 2019-2024 年)的合作资助项目有关,但尚未对这一合作关系在选择收益方面的效率进行衡量。我们的目标是:(1) 估算三个育种周期中抗旱性和草坪草质量的预期和实际遗传增益;(2) 在历史数据分析中,比较在项目支持下开发的栽培品种与标准栽培品种;(3) 比较在干旱和非干旱环境中,目测评估性状与使用小型无人机系统图像评估性状的遗传增益。为此,我们对历史数据进行了调查,并对 2011-2024 年的项目试验评估进行了回顾性分析。我们对已实现遗传增益的研究结果表明,在提高百慕大草、圣奥古斯丁草、海滨雀稗和泽泻草的抗旱性方面取得了进展。此外,与标准栽培品种相比,百慕大草、圣奥古斯丁草和佐伊夏草的这一性状在每个周期都有显著的正增长。虽然目测性状的遗传率较高,但图像评估性状的遗传增量更为明显。
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来源期刊
Crop Science
Crop Science 农林科学-农艺学
CiteScore
4.50
自引率
8.70%
发文量
197
审稿时长
3 months
期刊介绍: Articles in Crop Science are of interest to researchers, policy makers, educators, and practitioners. The scope of articles in Crop Science includes crop breeding and genetics; crop physiology and metabolism; crop ecology, production, and management; seed physiology, production, and technology; turfgrass science; forage and grazing land ecology and management; genomics, molecular genetics, and biotechnology; germplasm collections and their use; and biomedical, health beneficial, and nutritionally enhanced plants. Crop Science publishes thematic collections of articles across its scope and includes topical Review and Interpretation, and Perspectives articles.
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