摘要
【目的】探讨新疆野苹果不同类型单株对苹果小吉丁虫危害的抗性差异,提出简化抗性指标调查的方法。【方法】以具有不同抗苹果小吉丁虫(Agrillus mali Matsumura)特性的新疆野苹果类型单株为试验材料,通过在苹果小吉丁虫疫区实地调查,摸清新疆野苹果受苹果小吉丁虫的危害特点,利用聚类及最优回归分析法简化抗性指标。【结果】在木段直径大于3 cm和木段直径小于3 cm的径阶上,低抗类型单株的枯枝率极显著大于高抗类型,低抗类型野苹果单株枯枝率在44.92%~82.52%区间,其中XY-108枯枝率高达82.52%,高抗类型单株枯枝率在4.17%~21.33%区间;低抗类型的羽化孔数、总虫口数显著大于高抗类型,其中低抗2单株羽化孔数最高11.2个,危害最为严重;因子聚类分析后,把危害指标聚为4大相似水平类,将新疆野苹果受苹果小吉丁虫危害调查从10个指标简化为4个,并建立了苹果小吉丁虫总虫口数低抗类型和高抗类型最优回归模型,分别为:Y=38.97+1.000 9X_1+1.490 4X_2,R^2=0.949 009,Y=7.48+7.794 4X_1+0.818 5X_2-8.354 3X_3,R^2=0.999 955。【结论】新疆野苹果存在高抗苹果小吉丁虫类型单株,高抗类型和低抗类型在枯枝率及总虫口数、羽化孔数等抗虫指标间差异较大。
[ Objective ] In this paper we study Agrilus mali Matsumura resistance of different types of Xinjiang wild apple to come up with simplified method for insect resistance investigation index. [ Method ] Agrilus mali Matsumura different resistant plant types of Xinjiang wild apple were used as plant materials to investigate the Agrilus mali Matsumura affected area and make clear the damage characteristics of Agrilus mali Matsumura. Finally clustering method and the optimal regression analysis method were applied to simplify the resistant investigation factors. [ Result ] Results indicated： dead woods on the low resistant type （2 low resistant type） were significantly higher than that of the high resistant ones （investigated shoot diameters： bigger than 3 cm or smaller than 3 cm） ,deadwood levels of low resistant types were within the range of 44.92% to 82.52%, the highest in XY - 108 ;in high resistant type, deadwood levels were within the range of 4.17% - 21.33%. The feathered hole number and total insect density of low resistant type were significantly greater than those of the high resistant type, among which the highest feathered hole number （11.2） and most serious damage were observed in low resistant 2. After factor clustering analysis, the risk indicators of Agrilus mali Matsumura in Xinjiang wild apple were classified into 4 similar groups, simplified from the previous 10 to 4 indicators. In the end, these four indicators were employed to set up a optimal regression model of Agrilus mali Matsumura total insect density for both low resistant and high resistant ones, Y = 38.97 ＋ 1. 000 9X1 ＋ 1.490 4X2, R2 - 0.949 009, Y = 7.48 ＋7. 794 4X1 ＋ 0. 818 5X2 - 8. 354 3X3,R2 =0.999 955,respectively. [ Conclusion] The study suggested that there was high resistant type for Agrilus mall Matsumura in Xinjiang wild apple. There were significant differences in shoot diameter, emergence holes and total insect density between low resistant and high resistant ones.
出处
《新疆农业科学》
CAS
CSCD
北大核心
2015年第10期1859-1865,共7页
Xinjiang Agricultural Sciences
基金
新疆农业科学院青年基金项目(xjnkq-2015035)
自治区重大专项(201330122-1)
自治区公益性科研院所基本科研业务经费项目(KY2013059)~~
关键词
新疆野苹果
苹果小吉丁虫
抗虫性
聚类分析
最优回归分析
Malus sieversii（ Lebed. ） Roem.
Agrilus mali matsumura
insect resistant
cluster analysis
optimization regression method
