Heritability estimates of components of incubation mortality in White Leghorns.
1. A total of 39,280 eggs obtained from two selected White Leghorn strains over 4 generations representing 290 sires were incubated. 2. The unhatched eggs were broken open for examination of embryonic developments and classified as early-dead (0-11 d), late-dead (12-22 d) and pips. 3. The sire-component heritability estimates (%) pooled over years in the two strains, respectively were 8.5 +/- 1.5 and 7.6 +/- 1.4 for total mortality; 0.5 +/- 0.5 and 6.3 +/- 1.2 for early-dead; 5.8 +/- 1.2 and 5.5 +/- 1.1 for late-dead and 5.0 +/- 1.1 and 3.1 +/- 0.9 for pips.
Brah
G S
GS
Department of Animal Science, Punjab Agricultural University, India.
Sandhu
J S
JS
Chaudhary
M L
ML
D000818:Animals; D002642:Chick Embryo / Q000254:growth & development*; D002645:Chickens / Q000235:genetics* / Q000502:physiology; D005260:Female; D005298:Fertility / Q000235:genetics*; D008297:Male