1College of Agriculture, PJTSAU
2Institute of Wood Science and Technology, Bengaluru, 560003, Karnataka, India
3ICAR-Indian Institute of Rice Research, Rajendranagar, Hyderabad, 500030, Telangana, India
4ICAR-Indian Institute of Millets Research, Rajendranagar, Hyderabad, 500030, Telangana, India
*Email: padmakumariento@gmail.com (corresponding author): ORCID ID 0000-0003-2318-2540
Online Published on 20 April, 2024.
Morphometric characterization of male genitalia is an important aspect for studying intraspecific variation in Lepidoptera. In this study, size variation in the male genitalia of rice yellow stem borer (YSB) Scirpophaga incertulas (Walker) collected from nine locations through sex pheromone traps was examined. Measurements of male genitalial parts like uncus length (UL), uncus width (UW), valva length (VL), valva width (VW), saccus length (SL), saccus width (SW), aedeagus length (AD) were considered. Significant size variation was observed among the populations, and the measurements SL, SW, VL, VW, UL, UW and AD contributed to about 16% to location variability. The results showed that all characters except valva width was significantly different (p≤0.05) among the nine populations.
Rice Scirpophaga incertulas, Male genitalia, Intraspecific variations, Uncus, Valva, Saccus, Aedeagus, Morphometrics, Principal, Components, Cluster analysis
