基于TOPSIS-RSR法的谷子抗倒伏性综合评价与品种筛选OA

Lodging resistance is a key trait affecting the mechanized harvesting and stable yield of foxtail millet.For the effective screening of lodging-resistant accessions,a quantitative evaluation and grading classification of 23 foxtail millet varieties(lines)was conducted in this study.Based on six indicators(plant height,basal internode length,fresh weight per plant,root dry weight,stalk breaking resistance,and mechanical strength),the weights of each indicator were determined by the entropy weight method,and a TOPSIS-RSR coupled model was established for comprehensive evaluation.The results indicated that stalk breaking resistance and mechanical strength were the core indicators(both with weights higher than 21%).The model classified the varieties into four grades:Grades 4 and 3(e.g.,'Gonggu 75'and'Gong'ai 5')were highly lodging-resistant varieties;Grade 2(e.g.,'Nen 09-1')was lightly lodging-susceptible varieties;and Grade 1('1K193')was severely lodging-susceptible varieties.This evaluation system effectively overcomes the limitations of single indicators,realizes the objective grading of lodging resistance,and provides a reliable basis for lodging-resistant foxtail millet breeding and the selection of varieties suitable for mechanized harvesting.