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This study was conducted to characterize local chickens in the northwest ofAlgeria based on some phenotypic traits and to look at prediction of bodyweight from morphometric measurements (linear body). The results indicatedthat the predominant comb colour was dark red (77.8 %), followed by lightred (22.2 %). Tarsus colour was either white (40.9 %), grey(31 %), yellow (15.39 %), dark (8.05 %), or green (4.51 %).Most chickens (81.7 %) had orange eyes, while 10.37 and 7.92 % hadyellow and dark-brown eyes, respectively. The dominant earlobe colour waswhite (73.96 %), followed by red (16.81 %). The remaining proportion included yellow and red-mottled yellow and black earlobes. Proportions of theadaptive genes were low. Incidences of Na, F, Pti, Cr, R, and P genes were 8.82,0.45, 1.22, 5.54, 3.35, and 4.7 %, respectively. The calculated genefrequencies ranged from 0.002 to 0.045. Variations were also found inquantitative morphological traits. Sex-associated differences (<i>P</i> < 0.001) were observed in almost all the parameters evaluated with highervalues recorded for males. Phenotypic correlations of body weight andbiometric traits ranged from −0.13 to 0.88 and −0.15 to 0.97 for malesand females, respectively. From the factor analysis with varimax rotation ofthe intercorrelated traits, three principal components which accounted for71.6 and 73.2 % of the total variance were extracted in males andfemales, respectively. Orthogonal body shape characters derived from thefactor analysis accounted for 84.3 and 94.2 % of the variation in bodyweight of males and females, respectively. Information obtained from thisstudy could be useful in an appropriate management, breeding programmes forselection and utilization of Algerian chicken genetic resources

Phenotypic characterization of the indigenous chickens &lt;i&gt;(Gallus gallus)&lt;/i&gt; in the northwest of Algeria

Phenotypic characterization of the indigenous chickens <i>(Gallus gallus)</i> in the northwest of Algeria