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Acta Prataculturae Sinica ›› 2020, Vol. 29 ›› Issue (12): 50-60.DOI: 10.11686/cyxb2020022

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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

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