Phylogenetic divergence of Lipaphis erysimi pseudobrassicae (Aphididae: Homoptera): a dominant specialist aphid on Rapeseed-mustard, India.

Lipaphis erysimi (Lipaphis erysimi erysimi and Lipaphis erysimi pseudobrassicae) group, often known as the mustard or turnip aphid, is one of the most devastating specialist aphid of Rapeseed-mustard, causing yield losses of 9 to 96%. This study was carried out with a goal of precisely identifying the dominant specialist aphid of Rapeseed-mustard and to address the issues such as genetic differentiation from different Rapeseed-mustard growing regions covering all the six zones of India. The dendrogram, Principal component analysis (PCA) and phylogenetic relationships revealed that populations of Jorhat (North Eastern India) were highly diverged. Phylogenetic relationship produced by Tamura 3-parameter with Gamma distribution (T92 + G) model using mtCOI demonstrated the presence of L. e. pseudobrassicae in all of the surveyed locations in India including Chintapalli (Andhra Pradesh) a Southern India, where it was reported for the first time. Neutrality tests viz. Tajima and Fisher test supported neutral theory of evolution. Furthermore, our findings in mapping the distribution of L. e. pseudobrassicae in various locations will pave the way for future research and the development of area-wide management tactics for L. e. pseudobrassicae in India. [ABSTRACT FROM AUTHOR]