Research Articles (Published online: 15-12-2021)
RESPONSE TO SHORT TERM INDEX SELECTION FOR ECONOMIC TRAITS IN MEATTYPE JAPANESE QUAIL
D
jivaonline,
D:
Abstract
ABSTRACT
'Nandanam quail' (Coturnix coturnix japonica) were selected based on multi trait selection index constructed
for fifth week body weight, age at sexual maturity, egg weight at 12 weeks of age and egg production up to 18 weeks of age with an objective to increase body weight and egg production simultaneously. The overall least squares means of weekly body weights from 1-5weeks of age, ASM, EW12, EW16, EP18 and EP24 in selected population of Japanese quail were 35.77g, 76.53g, 123.12g, 160.05g, 181.62g, 46.21d, 12.68g, 13.78g, 65.30 and 95.06 eggs, respectively. The realized genetic responses for body weights at 1,2,3,4 and 5 weeks of age in sex pooled population of Japanese quail were 4.86, 8.07, 4.85, 10.99 and 11.69g, respectively. The females were heavier than males from first week of age onwards in selected and from second week of age in the unselected population. The realized genetic responses for age at sexual maturity, egg weights at 12 and 16 weeks of age and egg production up to 18 and 24 weeks of age were -6.2d, 0.03g, 1.12g, 6.66 and 9.85 2 eggs, respectively. The heritability of index (h ), correlation of index with aggregate genotype (R ) and response in i IH aggregate genotype (?H) were 0.54, 0.32 and 1.05, respectively for the index of S generation parents. It is concluded that multi-trait index selection can be successfully employed for bringing out simultaneous improvement for various economic
traits in Japanese quail.
Key words: Index selection, Response, Japanese quail
Keywords :
Share this article on [Facebook] [LinkedIn]
Article history: Received: 15-12-2021, Accepted : 15-12-2021, Published online: 15-12-2021
