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Titolo:
DEVELOPMENTAL STABILITY IN STOCKS OF WHITE LEGHORN CHICKENS
Autore:
YANG A; DUNNINGTON EA; SIEGEL PB;
Indirizzi:
VIRGINIA POLYTECH INST & STATE UNIV,DEPT ANIM & POULTRY SCI BLACKSBURG VA 24061 VIRGINIA POLYTECH INST & STATE UNIV,DEPT ANIM & POULTRY SCI BLACKSBURG VA 24061
Titolo Testata:
Poultry science
fascicolo: 12, volume: 76, anno: 1997,
pagine: 1632 - 1636
SICI:
0032-5791(1997)76:12<1632:DSISOW>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
FLUCTUATING ASYMMETRY; SHEEP ERYTHROCYTES; STRESS;
Keywords:
CHICKEN; BILATERAL ASYMMETRY; GENETIC STRESS; HOMEOSTASIS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
24
Recensione:
Indirizzi per estratti:
Citazione:
A. Yang et al., "DEVELOPMENTAL STABILITY IN STOCKS OF WHITE LEGHORN CHICKENS", Poultry science, 76(12), 1997, pp. 1632-1636

Abstract

The degree of asymmetry in bilateral morphological characters may reflect genetic and environmental stressors. Shank length and diameter, weight and length of the first primary wing feather, and distance between the junction of upper and lower mandibles and auditory canal (face length) were used to classify bilateral types and measure relative asymmetry (RA) in six genetic stocks. The stocks were the S-23 generationof White Leghorn lines selected for high or low antibody response to SRBC, sublines in which selection had been relaxed for eight generations, and reciprocal crosses of the selected lines. Differences were found among all stocks for the traits measured. Rankings among traits forRA in descending order were face length, shank diameter, feather weight, and shank and feather lengths. The RA of shank and feather lengthsdid not differ from each other. An overall RA composed of mean RA of the five traits showed that the two selected Lines exhibited greater RA than the crosses between them. The RA of the two lines where selection had been relaxed was similar to that of selected lines. This research suggests that an overall RA created as a combination of RA of several bilateral traits can be a valid measure of genetic stress in chickens and provides a method of comparing developmental stability among populations.

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Documento generato il 22/10/20 alle ore 09:16:35