Heterophil/lymphocyte ratio as a selection criterion for heat resistance in domestic fowls.
Br Poult Sci
; 38(2): 159-63, 1997 May.
Article
en En
| MEDLINE
| ID: mdl-9158890
1. Two experiments were conducted to examine the Heterophil/Lymphocyte ratio (H/L) as criterion for selection for resistance to heat stress and some aspects of general resistance in domestic fowls. 2. The first experiment on a small sample (n = 64) of light breed Iraqi local fowls showed that this ratio could be used as an indicator of heat stress resistance. 3. The second experiment on a large sample (n = 1160) of heavy parent stock confirmed the results. It showed that there was a different H/L ratio for the two strains and that there was much individual variability in the H/L ratio within-strain that could be utilised for individual selection for heat resistance. 4. The H/L ratio was highly heritable; Resistant and Sensitive groups, defining all individuals with an H/L ratio over the upper 95% confidence limit as 'Sensitive' and those below as 'Resistant' produced progeny with significantly different H/L ratios. 5. There were indications of differences in mortality between the progeny of the Resistant and the Sensitive groups. 6. The H/L indicator could be used as a criterion to select for heat stress resistance.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Aves de Corral
/
Selección Genética
/
Regulación de la Temperatura Corporal
/
Linfocitos
/
Granulocitos
/
Calor
Límite:
Animals
País/Región como asunto:
Asia
Idioma:
En
Revista:
Br Poult Sci
Año:
1997
Tipo del documento:
Article
Pais de publicación:
Reino Unido