Study on Reproductive Parameters of Barred Plymouth Rock, White Leghorn, Rhode Island Red and White Rock Breed of Cock
The aim of this experiment was to compare hatchability traits of four different breeds. A total of 3087 eggs were collected in 3 batches following artificial insemination from individually caged hen. For different breeds of cock; barred plymouth rock, white leghorn, rhode island red and white rock were compared. Fertility was highest in WLH (95.08%), intermediate in WR (92.57%) and lowest and similar in BPR (88.97%) and RIR (88.16%). Breed had little effect on fertile eggs (P>0.05). However, hatchability on total eggs was highest (P<0.05) and similar in WLH (85.99%) and WR (85.46%), lowest in BPR (81.36%) and RIR (80.21%). Breed had no significant (P>0.05) effect on dead in germ and dead in shell. Among 4 genotypes RIR (98.56%) and WLH (97.90%) were the highest (P<0.05) and similar normal chicks hatched, intermediate in BPR (97.73%) and lowest in WR (96.27%). The percentage of abnormal chicks was observed highest in WR (3.73%), intermediate in BPR (2.27%) and lowest in RIR (1.44) and WLH (1.43). Breed had little effect on chick weight at hatching. Percent chick weight was found highest in BPR (67.24%), intermediate in RIR (65.96%) and lowest and similar in WR (65.47%) and WLH (65.17%). Batch had no significant effect among different hatchability traits.
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