Realized Heritability Estimates of Hexythiazox Resistance in the Citrus Red Mite, Panonychus citri (MCGREGOR)

Studies on Hexythiazox Resistance in Phytophagous Mites (Part 6)

Abstract

Estimations of realized heritabilities were conducted for the character of hexythiazox resistance by performing artificial laboratory selections in the citrus red mite, Panonychus citri (MCGREGOR), which were collected from a citrus orchard at Haibara Agricultural Research Station (Nippon Soda Co., Ltd.) in Shizuoka Prefecture, Japan. Realized heritabilities were estimated to be 0.835 for the selection for resistance using a strain collected from the orchard after 17 field selections during 6 years, and 0.051 for the selection for susceptibility using a greenhouse-maintained susceptible strain collected from the orchard before the field selections. These results suggested that hexythiazox resistance would be highly heritable in the strain whose initial resistance level was moderate.