Abstract

OSSA SARAZ, Gustavo et al. Training, development and phenotypic characterization of productive and reproductive characters Romosinuano herd of gene bank Colombia. Corpoica cienc. tecnol. agropecu. [online]. 2013, vol.14, n.2, pp.231-243. ISSN 0122-8706.

The development and documentation of the gene bank of the Romosinuano native cattle breed herd for conservation purposes began in 1936; currently it is composed of 8 families and 502 individuals that are kept at Corpoica's Turipaná Research Center, in Cereté, Colombia. Digitalized data has been sorted, classified and analyzed, establishing the origin of the 270 animals that made up the initial herd from 11 herds: El Torno (43%), La Granja (16%), El Recreo (14%), Los Pinos (10%) and the remaining 17% of La Vorágine, Colombia, Marta Magdalena and El Chorrillo. Applying the least squares method and the GLM procedure (SAS, 1995) a phenotypic characterization of the weights of animals at different ages and stages of production, age at first calving and calving interval, birth weight, weaning 16 months adjusted weight at first calving, cow weight at calving and cow weight at weaning of the calf was obtained from 12673, 6543, 4363, 620, 7178 and 2847 records, with values of: 29.5±3.5, 163±35, 230±45, 393±51, 444±64 and 447±60 kg respectively; the adjusted age at weaning and at first birth, obtained from 6572 and 2064 records were 256±23 and 1133±200 days, respectively; the calving interval from 9435 record was 422±131 days. Reproductive efficiency of 86.3% confirms the adaptation of the breed in the Sinú valley.

Keywords : adaptation; reproductive efficiency; landraces.

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