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草业学报 ›› 2020, Vol. 29 ›› Issue (12): 50-60.DOI: 10.11686/cyxb2020022

• 研究论文 • 上一篇    下一篇

高寒地区不同燕麦品系抗倒伏相关性状分析

杨晶(), 刘文辉, 梁国玲(), 贾志锋, 刘凯强, 张燕, 吴瑞, 杨钰洁   

  1. 青海省青藏高原优良牧草种质资源利用重点实验室,青海大学畜牧兽医科学院,青海 西宁 810016
  • 收稿日期:2020-01-20 修回日期:2020-03-23 出版日期:2020-12-28 发布日期:2020-12-28
  • 通讯作者: 梁国玲
  • 作者简介:Corresponding author. E-mail: qhliangguoling@163.com
    杨晶(1995-), 女, 山西忻州人, 在读硕士。E-mail: yj950315@163.com
  • 基金资助:
    青海省科技厅基础研究项目(2018-ZJ-751);青海省畜牧兽医科学院自选项目(MKY-2019-01);青海省科技厅重点实验室发展专项(2020-ZJ-Y03);青海省“高端创新人才计划” 和现代农业产业技术体系建设专项资金

Traits correlated with lodging resistance of oat strains in the alpine region

Jing YANG(), Wen-hui LIU, Guo-ling LIANG(), Zhi-feng JIA, Kai-qiang LIU, Yan ZHANG, Rui WU, Yu-jie YANG   

  1. Key Laboratory of Use of Forage Germplasm Resources on Tibetan Plateau of Qinghai Province,Academy of Animal and Veterinary Sciences of Qinghai University,Xining 810016,China
  • Received:2020-01-20 Revised:2020-03-23 Online:2020-12-28 Published:2020-12-28
  • Contact: Guo-ling LIANG

摘要:

为明确影响燕麦抗倒伏性的关键性状,选用高寒地区一组抗倒伏能力较强的燕麦资源(QYJ301、QYJ386、QYJ322、QYJ986、QYJ211)与另一组较易倒伏的燕麦资源(QYJ272、QYJ224、QYJ288、QYJ320、QYJ280、QYJ055)对与抗倒伏相关的25个性状进行方差分析。结果表明,抗倒伏组品系与易倒伏组品系的株高(抗倒伏组:103.00~117.40 cm;易倒伏组:125.80~144.18 cm)、穗长(抗倒伏组:17.82~21.94 cm;易倒伏组:23.82~27.10 cm)、重心高度(抗倒伏组:50.24~56.34 cm;易倒伏组:56.70~59.24 cm)、穗位高(抗倒伏组:84.54~95.46 cm;易倒伏组:98.80~117.08 cm)、基部节长、茎粗、茎粗系数、倒伏指数与茎基部力学性状均存在显著(P<0.05)或极显著(P<0.01)差异,且不同倒伏性能的燕麦资源在抗倒伏相关性状上表现不同。利用上述存在显著差异的22个相关性状进行聚类分析,以相对距离10作为划分,将11个燕麦资源聚成两类,即抗倒伏组与易倒伏组。进一步通过相关性分析发现,株高、穗长、重心高度、穗位高、茎粗系数、茎基部力学性状均与倒伏指数存在显著(P<0.05)或极显著(P<0.01)相关关系,均可作为评价燕麦抗倒伏性能的重要指标,这些性状综合影响燕麦的抗倒伏能力。

关键词: 高寒地区, 燕麦, 表型性状, 力学性状·

Abstract:

The aim of this study was to identify the traits affecting the lodging resistance of oats (Avena sativa). We analyzed 25 traits in lodging-resistant oat germplasm lines (QYJ301, QYJ386, QYJ322, QYJ986, QYJ211) and lodging-susceptible oat germplasm lines (QYJ272, QYJ224, QYJ288, QYJ320, QYJ280, QYJ055) from the alpine region. Several traits differed significantly (P<0.05) or extremely significantly (P<0.01) between the lodging-resistant group and the lodging-susceptible group, including plant height (lodging-resistant group: 103.00-117.40 cm; lodging-susceptible group: 125.80-144.18 cm), ear length (lodging-resistant group: 17.82-21.94 cm; lodging-susceptible group: 23.82-27.10 cm), height of center of gravity (lodging-resistant group: 50.24-56.34 cm; lodging-susceptible group: 56.70-59.24 cm), ear height (lodging-resistant group: 84.54-95.46 cm; lodging-susceptible group: 98.80-117.08 cm), internode length, stem diameter, stem position coefficient, lodging index, and mechanical properties. The oat germplasm lines with different lodging properties performed differently in terms of lodging resistance-related traits. Cluster analysis was performed for the 22 lodging-resistance related traits showing significant differences between resistant and susceptible oat resources. A relative distance of 10 was used to divide the 11 oat germplasm lines into two categories, namely the lodging-resistant group and the lodging-susceptible group. Plant height, ear length, height of center of gravity, ear height, stem position coefficient, and mechanical properties at the base of the stem all showed significant (P<0.05) or extremely significant (P<0.01) correlations with lodging index. Because these traits affect the lodging resistance of oats, they can be used as important indexes of lodging resistance.

Key words: alpine region, oat, phenotypic traits, mechanical traits