Vol. 2 (1) : January-February 2011 issue
Green Farming Vol. 2 (1) : 109-111 (January-February, 2011) (New Series)
Comparative performance of foundation cross hybrids of silkworm, Bombyx mori L. under high temperature and humidity conditions
VEERANNA GOWDAa1*, S.K. ASHWATHa2 and G.V. KALPANAb3
aCentral Sericultural Research and Training Institute, Srirampura, Mysore - 570 008 (Karnataka)
bP4, BSF, Devarayapattana, Kandali Post, Hassan - 57 (Karnataka)
Designation : 1,2,3Scientist-C *Correspondence
Subject : Sericulture
Paper No. :
Total Pages : 3
Received :
Revised accepted :
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Citation :
VEERANNA GOWDA, S.K. ASHWATH and G.V. KALPANA. 2011. Comparative performance of foundation cross hybrids of silkworm, Bombyx mori L. under high temperature and humidity conditions. Green Farming Vol. 2 (1) : 109-111 (January-February, 2011) (New Series)
ABSTRACT
Bivoltine foundation cross (FC) hybrids exposed to high temperature and high relative humidity (RH) were analyzed for 5 economic traits. Comparative performance of the foundation cross (FC) hybrids both at high temperature (36 + 1° C), relative humidity (80+5%) and room temperature of 25+1 °C and humidity of 65+5% were made and the effect of temperature and humidity on the economic traits were studied. The deleterious effect of high temperature and humidity on all the 5 traits has been well reflected in the productive FC hybrids. The overall analysis of the data clearly indicates that the productive foundation cross hybrids are more vulnerable to high temperature and humidity and thereby affecting not only survival rate but also other economic characters. Out of the 28 foundation crosses, CSR12 x S5 stood first by expressing lower percentage of decrement for the expression of economic characters when its performance at two temperature was considered.
Key words :
Bombyx mori, economic traits, foundation cross, high temperature, humidity, productive hybrids, silkworm.
