2026-04-17T14:36:32Zhttps://recercat.cat/oai/requestoai:recercat.cat:20.500.12327/45642025-10-22T11:07:36Zcom_2072_4428com_2072_4427col_2072_487898
RECERCAT
author
Francesch, A.
author
Estany, J.
author
Alfonso, L.
author
Iglesias, M.
other
Producció Animal
group
Genètica i Millora Animal
2025-10-22T11:07:35Z
2025-10-22T11:07:35Z
1997-12-01
Francesch, A, J Estany, L Alfonso, and M Iglesias. 1997. “Genetic Parameters for Egg Number, Egg Weight, and Eggshell Color in Three Catalan Poultry Breeds.” Poultry Science 76 (12): 1627-1631. doi: 10.1093/ps/76.12.1627
0032-5791
http://hdl.handle.net/20.500.12327/4564
https://doi.org/10.1093/ps/76.12.1627
Heritabilities for egg number, egg
weight, and eggshell color (percentage light absorbance)
at 39 wk of age, and the genetic correlations between
them were estimated by restricted maximum likelihood
in three Catalan poultry breeds: Penedesenca Negra
(PN), Prat Lleonada (PL), and Empordanesa Roja (ER).
Additive genetic differences between these breeds were
also estimated. Data were from the IRTA Poultry
Genetic Conservation Program and consisted of records
from 1,309 PN, 1,466 PL, and 1,440 ER hens, which were
obtained from 80 contemporary batches per breed
hatched between 1987 and 1992. Estimates of heritability
for egg number, egg weight, and eggshell color were,
0.20, 0.59, and 0.49 for PN, 0.31, 0.48, and 0.53 for PL;
and 0.33, 0.50, and 0.27 for ER. Estimated genetic correlations between egg number and egg weight, egg
number and shell color, and egg weight and shell color
were, for PN, –0.22, –0.03, and 0.00; for PL, –0.21, –0.06,
and 0.09; and –0.19, –0.29, and 0.30 for ER. Heritability
for eggshell color and genetic correlation between
eggshell color and other traits showed a different genetic
pattern in ER breed. Significant additive genetic differences (P < 0.05) were found between ER and PN base
populations for egg number (3.89), egg weight (0.91),
and eggshell color (–3.50); and between ER and PL for
egg number (6.69) and eggshell color (35.39). The PN
and PL breeds differed significantly (P < 0.05) for
eggshell color (38.22), which was darker in PN. These
results could be taken as the expected genetic differences for these breeds
eng
Attribution-NonCommercial-NoDerivatives 4.0 International
Genetic Parameters for Egg Number, Egg Weight, and Eggshell Color in Three Catalan Poultry Breeds
info:eu-repo/semantics/article