[PDF] Top 20 Genetic and environmental effects on sexual precocity traits in Nellore cattle

... RESUMO - O objetivo neste trabalho foi estimar a herdabilidade das características probabilidade de prenhez precoce (PPP) e perímetro escrotal (PE) de animais da raça Nelore e a correlação genética entre essas ... See full document

... female traits analyzed were age at first calving (16,347 records), adult weight (5,934 records) and cumula- tive productivity (7,681 records) while the male traits were scrotal circumference at 365 ... See full document

... the genetic and non-genetic effects that influence vigor at birth and preweaning mortality in Nellore ...1978 and 2006, offspring of 363 sires, were ...(VB) ... See full document

... used in breeding programs of Nelore cattle as an indicator trait for female sexual ...efficiency and provides economic benefits by reducing production cycles (Gunski et ...found in many ... See full document

... the genetic cor- relations between weight at 120 days and visual scores were ...of genetic correlation for S was the highest, as was expected, since the body structure (S) trait is related to ... See full document

... of genetic improvement also requires consideration to the stability of the sires selected for ...ranking and the selection of superior sires (14) ...lower environmental sensibility of the genotypes, ... See full document

... activity in this region is agriculture and livestock, in most cases, using traditional ...available on cattle-raising in this part of ...estimate genetic parameters ... See full document

... MTM and recommended that genetic parameters estimated by RRM may have to be adjusted based on estimates from MTM, if a RRM is to be used for genetic ...differences in EPD between MTM ... See full document

... cocity and muscling in castrated cattle were all negative- ly correlated with gain-to-feed ratio (p < ...muscling and precocity are different traits and may be somewhat ... See full document

... additive genetic effect; ⊗ denotes the direct product between matrices; A is the matrix of the numerators of the Wright relationship coefficients between individuals; M is the (co)variance matrix of the maternal ... See full document

... allele and genotype frequencies of the GH1/Alu I and POU1F1/Hinf I polymorphisms in beef cattle belonging to different genetic groups and to determine the effects of these ... See full document

... trait) and the survival model allow to include time-depen- dent effects, which is not possible in the linear ...models) and between the traits age at first conception and heifer ... See full document

... these effects in a multi-trait ...all traits compared with WG_B_120 (0.07470.008; Table 3), and the estimates of standard errors were of the same magnitude of estimates of maternal ... See full document

... genotypes and studied traits (Table 2) were not signi! cant (p>0.05). In spite of the CAST/XmnI being a SNP in a non-coding region, it could be linked or in linkage disequilibrium ... See full document

... inheritance on birth and weaning weight was evaluated in an experimental Hereford ...Data on 1,720 records for birth and weaning weights from calves born between 1963 and 2002 ... See full document

... these genetic changes is determined by selection accuracy and intensity, genetic variation, and generation interval, being directly proportional to the first three and inversely ... See full document

... Polymorphisms and haplotypes in the bovine neuropeptide Y, growth hormone receptor, ghrelin, insulin-like growth factor 2, and uncoupling proteins 2 and 3 genes and their associations ... See full document

... ) and by tolerant (G2) x tolerant (G2) related crosses ...dominance effects (Hallauer and Miranda Filho, ...acidity in- creased the genetic diversity of the lines, because G1 x G2 ... See full document

... genes in Nellore cattle and associate them with meat quality and carcass ...identified and mapped here at the gene regulatory region ...(AY428575.1:g.346G>A); and MYOG ... See full document

... this in- crease may have been due to the fact that the data sets which included non-calving females were less selected than the data sets which did not include non-calving females, that is, using only fertile ... See full document