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Chinese Journal Of Biological Control ›› 2019, Vol. 35 ›› Issue (4): 536-541.DOI: 10.16409/j.cnki.2095-039x.2019.04.008

• RESEARCH REPORTS • Previous Articles     Next Articles

Comparison in Life History Traits of Two Haplotypes in Harmonia axyridis (Coleoptera: Coccinellidae)

ZHANG Huanhuan, LI Hongran, ZHAO Rina, MENG Ling, LI Baoping   

  1. College of Plant Protection, Nanjing Agricultural University/Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Nanjing 210095, China
  • Received:2019-03-22 Online:2019-08-08 Published:2019-08-10

Abstract: Connecting genotypes and phenotypes improves our understanding of evolution of the organism. Harmonia axyridis has a variety of haplotypes, among the haplotypes presented in H. axyridis, we screened two dominant haplotypes (I and Ⅱ) from the population of Nanjing with asymmetric number in natural condition. In order to explore the differences in the biological characteristics of these two dominant haplotypes, we observed the developmental and reproductive performances from egg-hatching to adulthood of these two haplotypes while feeding on the aphid Megoura japonica (Matsumura) under laboratory conditions. The results indicated that the larval developmental duration of haplotype-I and haplotype-Ⅱ was significantly different, which was on average 14.38 d for Haplotype-I and 13.75 d for Haplotype-Ⅱ. Haplotype-I was lower than Haplotype-Ⅱ in survivorship across successive larval stages, 13.33% and 29.20% for L1, 5.49% and 13.75% for L2, 1.16% and 4.35% for L3, and 2.35% and 10.61% for L4, respectively. The two haplotypes did not differ in female lifetime fecundity, which was on average 936 eggs per female for Haplotype-I and 887 for Haplotype-Ⅱ. Haplotype-I was higher than Haplotype-Ⅱ in hatching rate of eggs, 64.53% for the former and 60.99% for the later. Overall, the difference in the number of two haplotypes of the H. axyridis in nature probably be due to differences in reproduction and development.

Key words: genotype, phenotype, biology, survivorship, reproduction

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