Relative warp analysis of shape variability of the head and pronotum in selected populations of the rice black bug
Issue Date
2010
Abstract
The landmark-based geometric morphometric approach of relative warps (RW) was used to determine the population structures of the rice black bugs (RBB), Scotinophara coarctata, from the Philippines and in one site in Malaysia based on the shapes of the head and pronotum. The symmetric and asymmetric components were used to analyze the direction of shape change for each structure. However, multivariate analyses were conducted only on the symmetric components to infer the relationships among the RBB populations. The results showed that in many cases, the landmark configurations are continuous. Landmark configurations of the pronotum separated the RBB from Omar, Malaysia. Considerable shape differences between populations were also found locally within Luzon, Iloilo, Palawan and Mindanao based from the results of the analyses. The results of the current study strongly suggest the existence of morphological differences in the populations of RBB, which may indicate possible genetic differentiation. Such variability may have direct bearing on the management of the RBB as a pest of rice agroecosystem. © 2010, INSInet Publication.
Source or Periodical Title
Australian Journal of Basic and Applied Sciences
ISSN
1991-8178
Volume
4
Issue
10
Page
4655-4670
Document Type
Article
Physical Description
illustrations, tables
Language
English
Subject
Geometric morphometrics, Relative warp analysis, Rice black bug, Scotinophara spp. (coarctata group)
Recommended Citation
Torres, M.A.J., Demayo, C.G., Barrion, A.T., Sebastian, L.S., Barrion, A.A. (2010). Relative warp analysis of shape variability of the head and pronotum in selected populations of the rice black bug. Australian Journal of Basic and Applied Sciences, 4 (10), 4655-4670.
Digital Copy
yes