Skin follicle characterization and relationship with fibre characteristics of Angora, Neuquén Creole goats, and their cross.

S. DEBENEDETTI; D. LOMBARDO,; N. GIOVANINNI; M. A. POLI; H. R. TADDEO

JOURNAL OF SMALL RUMINANT RESEARCH

ELSEVIER SCIENCE BV

Lugar: International Goat Association 12709 Grassy Drive, Little Rock, AR 72210, USA,; Año: 2010 vol. 82 p. 1 - 74

0921-4488

AbstractDifferences in hair follicle traits were investigated in kids of 3 genetic groupsfrom Patagonian goats: Angora, Criollo and first cross (F1). The following variableswere evaluated: primary and secondary follicle density (δF1 and δF2, follicles mm-217 );secondary to primary ratio (S/P), primary and secondary percentage area, (OA1 andOA2, %); primary and secondary individual area average (A1 and A2, μm219 ); averagefiber diameter (AFD, μm), its coefficient of variation (CVAFD; %); percentage of fiberscoarser than 30 μm (F>30, %); continuous medullated fiber, discontinuous medullatedfiber and kemp percentage (CONT , DISC and KEMP, %); down diameter (DD30, μm);hair diameter (DP30, μm); and down proportion (PD30, %). Findings indicate geneticgroup at 2.5 month old significant difference in S/P, OA1, OA2, A2º, δF1 and also inCVAFD, F>30, DD30, PD30, DP30 (P<0.01). We describe for the first time hair follicleManuscript traits in Criollo goats from north Neuquén. 26 Kid skin of three genotype groupsdemonstrates opposite tendencies for percentage of primary and secondary folliculartissue areas. It is notable that S/P, primary densities and secondary individual averagearea mostly explain differences in CVAFD between genotypes. This allows us tospeculate a different genetic control mechanism for both follicle types, nevertheless thisshould be demonstrated.