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家系纯化对褐飞虱致害特性的影响
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摘要:
采用标准苗鉴法,系统考察了褐飞虱生物型1和生物型2的致害特性在连续五代家系纯化过程中的变化状况,结果发现,家系纯化对两种生物型个体及群体的致害力均有影响,个体间存在的致害力差异有所减小但未被消除;两种生物型群体的致害力均显著下降,至第五代时对TN1的致害力已分别下降了23%和16%,但它们的致害特征并未发生根本性的改变,表明不同生物型的致害特性具有相对的稳定性,此外,致害力的纯化速度缓慢,容易发生衰退,显示的是数量性状的特征和某种程度的杂种优势,文中还对褐飞虱生物型的本质进行了讨论。
关键词:  褐飞虱 生物型 家系纯化 致害力
DOI:
修订日期:2000-10-12
基金项目:
Effects of Line Purification on the Damaging Characterof Both Biotype 1 and 2 in Brown Planthopper
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Abstract:
The effects of genetic purifying by continuous sibling cross on the damaging character of biotype 1 and biotype 2 of Brown Planthopper (BPH) were studied in this paper.The results showed that the specific damaging characters of different BPH biotypes generally maintained in the course of purifying though they were not easily purified and significantly declined by continuous sibling cross,indicating that BPH's damaging character is a kind of complex trait.Some discussions on essence,occurrence and change of BPH biotype were also provided.
Key words:  BPH,genetic purifying,damaging character,biotype

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