Acta Agrestia Sinica ›› 2023, Vol. 31 ›› Issue (6): 1788-1797.DOI: 10.11733/j.issn.1007-0435.2023.06.022

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Study on Lodging Resistance and Its Influencing Factors of 9 Oat Varieties in Qinghai-Tibet Plateau

HU Wei, LIANG Guo-ling, LIU Kai-qiang, LIU Wen-hui, LI Wen   

  1. Qinghai University Qinghai Academy of Animal Science and Veterinary Medicine, Key Laboratory of Superior Forage Germplasm in the Qinghai-Tibetan Plateau, Xining, Qinghai Province 810016, China
  • Received:2022-12-17 Revised:2023-02-22 Online:2023-06-15 Published:2023-06-30

青藏高原9个燕麦品种抗倒伏能力及其影响因素研究

胡伟, 梁国玲, 刘凯强, 刘文辉, 李文   

  1. 青海大学畜牧兽医科学院, 青海省青藏高原优良牧草种质资源利用重点实验室, 青海 西宁 810016
  • 通讯作者: 梁国玲,E-mail:qhliangguoling@163.com
  • 作者简介:胡伟(1997-),男,汉族,河北保定人,硕士研究生,主要从事牧草栽培育种方面的研究,E-mail:scihw123@163.com
  • 基金资助:
    青海省科技厅重点实验室发展专项“青海省青藏高原优良牧草种质资源利用重点实验室”(2020-ZJ-Y03);国家现代农业产业技术体系(CARS-34);“昆仑英才 乡村振兴人才”专项农业农村科技攻关团队资助

Abstract: In order to explore the differences in the lodging resistance of different oat germplasm resources and identify the main factors affecting the lodging resistance of oats,this experiment took 9 oat varieties from the Qinghai-Tibet Plateau as the research materials,and their phenotypic traits,stem mechanical properties,microstructure and root characteristics were systematically studied;and furthermore the path and path coefficient of the effects of the characteristics of various parts of oats on the lodging rate were analyzed by using structural equation model. The results show that:A. sativa 'LENA’ variety had the strongest lodging resistance among 9 Oat varieties,its ear length,plant height,height of gravity center and length of the second internode in stem were significantly lower than those of A. sativa 'Qingyin No.2’ and A. sativa 'Qingyongjiu 870’ varieties(P<0.05). The wall thickness of the second internode in stem,bending property,puncture strength,stem broken strength,root weight per plant,main root length and capillary root length were significantly higher than those of 'Qingyin No.2’ and 'Qingyongjiu 870’ (P<0.05). Structural equation model analysis showed that stem morphology had the largest direct effect on lodging resistance,while root characteristics had significant indirect and total effects on lodging resistance. Therefore,the stem morphology and root characteristics should be considered comprehensively into the breeding of lodging resistant oat varieties,so as to improve the accuracy of breeding.

Key words: Oats, Anti lodging, Phenotypic traits, Stem mechanics, Microstructure

摘要: 为探究不同燕麦种质资源抗倒伏能力差异,明确影响燕麦(Avena sativa L.)抗倒伏的主要因素,本试验以青藏高原地区9个燕麦品种为研究材料,对其表型性状、茎部力学特性、显微结构及根系特征进行系统研究,并利用结构方程模型分析燕麦各部位性状特征对燕麦倒伏率影响的路径及路径系数。结果表明:9份燕麦品种中'林纳’(A. sativa 'LENA’)的抗倒伏能力最强,其穗长、株高、重心高、第二节节长显著低于'青引2号’(A. sativa 'Qingyin No.2’)和'青永久870’(A. sativa 'Qingyongjiu 870’)(P<0.05),而第二节壁厚、弯曲性能、穿刺强度、茎秆折断力、单株根重、主根长和毛细根长均显著高于'青引2号’和'青永久870’(P<0.05)。结构方程模型分析表明,茎部形态结构对燕麦抗倒伏能力直接效应最大,根系特征对燕麦抗倒伏能力的间接效应和总效应突出。因此,进行抗倒伏燕麦品种选育时,应综合考虑茎部形态结构和根系特征,以提高品种选育的准确性。

关键词: 燕麦, 抗倒伏, 表型性状, 茎秆力学, 显微结构

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