Saxena R C, Demayo C G, Barrion A A
Division of Entomology, International Rice Research Institute, Manila, Philippines.
Biochem Genet. 1991 Apr;29(3-4):115-23.
Allozyme variation was studied in three Nilaparvata lugens biotypes infesting specific rice varieties and a biotype infesting a weed grass, Leersia hexandra. Of the 20 enzymes in N. lugens for which activity was noted, 9 were polymorphic. Eleven enzyme loci were monomorphic for the same allele in all biotype populations; the rest were polymorphic for two or more alleles. The mean number of alleles per polymorphic locus was 2.3, while the mean number of alleles per locus was 1.5; heterozygosity ranged from 0.02 to 0.06 (biotype 1 greater than biotype 3 greater than Leersia-infesting biotype greater than biotype 2). Allelic frequency differences were observed in five loci among the four biotypes. However, the coefficient of genetic identity (I) of 0.99+ showed that the four biotype populations were genetically close relatives or merely populations of N. lugens undergoing genetic differentiation.
对三种侵害特定水稻品种的褐飞虱生物型以及一种侵害杂草李氏禾的生物型进行了等位酶变异研究。在已记录到活性的褐飞虱20种酶中，有9种具有多态性。11个酶位点在所有生物型种群中对相同等位基因呈单态性；其余位点对两个或更多等位基因呈多态性。每个多态性位点的等位基因平均数为2.3，而每个位点的等位基因平均数为1.5；杂合度范围为0.02至0.06（生物型1大于生物型3大于侵害李氏禾的生物型大于生物型2）。在四种生物型中的五个位点观察到等位基因频率差异。然而，0.99+的遗传同一性系数（I）表明，这四个生物型种群在遗传上是近亲，或者仅仅是正在经历遗传分化的褐飞虱种群。
