1Research Scholar of Zoology, Cytogenetics and Molecular Genetics Biosciences DepartmentHimachal Pradesh University, Summer Hill, Shimla, Himachal Pradesh171005, India. E-mail: raghubir119@gmail.com
2Associate Professor of Zoology, Biosciences DepartmentHimachal Pradesh University, Summer Hill, Shimla, Himachal Pradesh171005, India. E-mail: meenakchaudhary@gmail.com
3Research Scholar, Maharshi Dayanand University, Rohtak, Haryana124001, India E-mail: mansiyadav1929@gmail.com
4Ph.D Scholar of Zoology Cytogenetics and Molecular Genetics lab no. 405, Zoology Biosciences DepartmentHimachal Pradesh University, Summer Hill, Shimla, Himachal Pradesh171005, India. E-mail: koundalsarita123@gmail.com
*Corresponding author: Meena Kumari Associate Professor of Zoology, Biosciences DepartmentHimachal Pradesh University, Summer Hill, Shimla, Himachal Pradesh171005, India. E-mail: meenakchaudhary@gmail.com
Online published on 7 July, 2022.
In the present investigation, karyotypes of two species of gall forming aphids, viz., Eriosoma ulmi (Linnaeus), and Tetraneura nigriabdominalis (Sasaki) have been studied. These aphid species were found to be infesting Ulmus wallichiana from Kullu district of Himachal Pradesh. The diploid chromosome number in E. ulmi is ten (2n=10), whereas T. nigriabdominalis is eighteen (2n=18). The chromosomes were holocentric. The karyotypes have been described. Idiograms were prepared on relative length data.
Eriosoma, Tetraneura, Gall, Aphid, Karyotype, Holocentric, Chromosome
