ArticleFrontiers in plant science2025
Stay-green trait improves yield, quality, and feeding value of forage oats under contrasting eco-sowing systems.
Article in Frontiers in plant science, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Introduction: Oat ( Methods: Two genotypes-QINGYAN 3 (control, CK) and its stay-green mutant (SG)-were evaluated over two consecutive years (2023-2024) at Huangzhong, Qinghai and Yuanmou, Yunnan under contrasting eco-sowing conditions. The SG mutant was developed through field-based phenotypic selection and long-term cultivation, resulting in a stable trait. Yield, nutritional composition, forage value, and stability were evaluated. Genotype, environment, and sowing regime effects were analyzed using linear mixed models (LMM), the Technique for Order Preference by Similarity to Ideal Solution (TOPSIS), and the Analytic Hierarchy Process (AHP) . Results: The SG genotype showed significantly higher biomass, grain yield, starch, protein, and fat contents than CK. It also had lower fiber fractions (ADF and NDF) and higher digestibility indicators, including dry matter intake (DMI), digestible dry matter (DDM), total digestible nutrients (TDN), relative feed value (RFV), and relative forage quality (RFQ). Environmental and inter-annual effects were pronounced: warm, low-latitude conditions favored higher yield, while cool, high-altitude conditions enhanced nutritional composition and forage quality. Conclusion: Overall, the SG genotype outperformed CK in both yield and quality, while CK exhibited slightly greater stability across environments. The SG trait combines high yield with superior quality, providing valuable germplasm for oat improvement. Selecting genotypes according to ecological zones can further enhance forage yield and quality, supporting sustainable livestock production.
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