On the Breeding of Bivoltine Breeds of the Silkworm, Bombyx mori L. (Lepidoptera: Bombycidae), Tolerant to High Temperature and High Humidity Conditions of the Tropics

Table 1

Sl. No.	Breeding lines	Parentage	Breeding Plan
Dumbbell
1	HH8	CSR19, CSR47, CSR51.	(CSR47 $\times$ CSR19) $\times$ CSR51
2	HH10		( CSR51 $\times$ CSR19) $\times$ CSR51
3	HH12		(CSR51 $\times$ CSR47) $\times$ CSR51