Assessing realized genetic gains in biofortified cassava breeding for over a decade: Enhanced nutritional value and agronomic performance

IF 2 3区 农林科学 Q2 AGRONOMY Crop Science Pub Date : 2024-10-03 DOI:10.1002/csc2.21369
Luis Fernando Delgado, Danilo E. Moreta, Nelson Morante, Jorge Ivan Lenis, Johan Steven Aparicio, Luis Fernando Londoño, Sandra Milena Salazar, Thierry Tran, Maria Alejandra Ospina, Jorge Luis Luna Melendez, Jhon Larry Moreno Alzate, Hernan Camilo Vargas, Lizbeth Pino Duran, Elvia Amparo Rosero Alpala, Xiaofei Zhang
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Abstract

Biofortified cassava (Manihot esculenta) plays a crucial role in enhancing the nutritional value of this essential staple, particularly in regions with limited dietary diversity and prevalent nutritional deficiencies. The cassava program at the International Center of Tropical Agriculture has dedicated over a decade to increase β-carotene content in biofortified cassava, simultaneously focusing on improving yield, dry matter, and plant architecture. This paper presents realized genetic gains in biofortified cassava by analyzing the data from replicated multilocation breeding yield trials at the target population of environments spanning a 10-year period (2013–2022). Following data curation, we observed significant positive genetic gains per year for β-carotene content (7.03%), fresh yield (4.15%), dry matter content (0.55%), and height at the first branch (1.29%). A negative correlation between β-carotene content and dry matter content was observed within 78% of trials. Moreover, our study uncovered a significant negative correlation between β-carotene content and fresh root yield (r = −0.22, p < 0.01) and an unfavorable positive correlation between β-carotene content and the number of branches (r = 0.23, p < 0.01). Such negative correlations between β-carotene content and farm-preferred traits presented substantial challenges for the development of biofortified cassava varieties. This research showed significant genetic gains and navigated the complexities of biofortified cassava development, providing breeding insights to enhance nutritional value while optimizing agronomic performance.
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评估十多年来生物强化木薯育种的遗传收益:提高营养价值和农艺性能
生物强化木薯(Manihot esculenta)在提高这种基本主食的营养价值方面发挥着至关重要的作用,尤其是在膳食多样性有限和营养缺乏症普遍存在的地区。国际热带农业中心(International Center of Tropical Agriculture)的木薯项目十多年来一直致力于提高生物强化木薯中的β-胡萝卜素含量,同时注重提高产量、干物质和植物结构。本文通过分析在目标环境人群中进行的多地点重复育种产量试验数据,介绍了生物强化木薯在10年间(2013-2022年)实现的遗传增益。经过数据整理,我们观察到每年在 β-胡萝卜素含量(7.03%)、鲜产量(4.15%)、干物质含量(0.55%)和第一分枝高度(1.29%)方面都有显著的正遗传增益。在 78% 的试验中,β-胡萝卜素含量与干物质含量之间呈负相关。此外,我们的研究还发现,β-胡萝卜素含量与鲜根产量之间存在显著的负相关(r = -0.22,p < 0.01),β-胡萝卜素含量与分枝数之间存在不利的正相关(r = 0.23,p < 0.01)。β-胡萝卜素含量与农家喜好性状之间的这种负相关关系给生物强化木薯品种的开发带来了巨大挑战。这项研究显示了巨大的遗传增益,并克服了生物强化木薯开发的复杂性,为在优化农艺性能的同时提高营养价值提供了育种见解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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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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