Selection of breeding resource materials of bivoltine breeds of Bombyx Mori L. for high temperature and high humidity tolerance Singh Harjeet, Kumar N. Suresh*, Kour Ravneet P.G. Department of Sericulture, Poonch Campus (University of Jammu), Poonch, 185101 1Silkworm Breeding and Genetics Section, Central Sericultural Research and Training Institute, Berhampore, 742101 *Corresponding author Email: nairsuresh_in@yahoo.com
Online published on 13 March, 2018. Abstract The silk produced in India is from cross breeds which are relatively inferior in quality compared to that of from bivoltine hybrids. The hot tropical conditions particularly in summer contribute to the poor performance of the bivoltine breeds. Therefore, it is highly pertinent to identify more bivotine breeds which withstand adverse climatic conditions. Accordingly, the present study selected suitable bivoltine breeds for use as breeding resource materials enabling tolerance to high temperature and high humidity. Twenty four bivoltine breeds tolerant to high temperature from different breeding centres were collected and screened at 35±1°C and high humidity (85±5%). Based on overall performance with special emphasis on survival at high temperature, ten breeds were selected. Top Keywords Bombyx mori L, bivoltine, selection, breeding resource materials, climatic conditions. Top |