000			02688nab a2200313 i 4500
003			BR-BrBNA
005			20250402161834.0
008			250402b2020 bl.ar|pooa||| 00| 0 eng |
040			_aBR-BrBNA _beng
072			_aL10 _b5214
100			_aSieklicki, Michelli de Fátima
100			_aMulim, Henrique Alberto
100			_aPinto, Luís Fernando Batista
100			_aValloto, Altair Antônio
100			_aPedrosa, Victor Breno
245			_aPopulation structure and inbreeding of Holstein cattle in southern Brazil
500			_aPublicação on-line; 27 ref.; 3 illus; 2 tables; Sumaries (En)
520			_a ABSTRACT - The present investigation aimed to evaluate the population structure and inbreeding of Holstein herds in southern Brazil. To carry out the analysis, the Associação Paranaense de Criadores de Bovinos da Raça Holandesa (APCBRH) in Brazil provided the data, which consisted of a pedigree file of 206,796 animals born between 1970 and 2014. Results regarding the following parameters were determined: pedigree integrity, effective number of founders, effective number of ancestors, generation interval, inbreeding coefficient, realized effective population size, and average relatedness coefficient. POPREP and ENDOG v.4.5 software packages were employed to estimate these parameters. Based on the data set, the mean generation interval was found to be 6.3 years, and the average inbreeding coefficient, related to inbred animals, was 4.99%. Furthermore, the realized effective population size varied throughout the time period, ranging from 22 to 114, whereas the rate of inbreeding in this same period showed a decreasing trend towards the later years in the period until 2014. Upon evaluation, average relatedness coefficient was estimated to be 0.71%. Moreover, the effective number of founders and ancestors were estimated as 418 and 400 animals, respectively. According to the level of inbreeding observed, it could be noticed that genetic diversity remains elevated, which will be important to the genetic progress in the Holstein breeding program in Southern Brazil. Keywords: effective population size, founders, generation interval
650			_aGADO HOLANDÊS
650			_aRAÇA
650			_aSELEÇÃO
650			_aENDOGAMIA
650			_aGENÉTICA ANIMAL
650			_aVARIAÇÃO GENÉTICA
773	0		_03545 _9317600 _dViçosa-MG Sociedade Brasileira de Zootecnia 1997 _o2024-4310 _tRevista Brasileira de Zootecnia (Brazil) _x1516-3598 _gv. 49 p. 1-10 ; (2020) _wBR2024000503
856			_uhttps://www.scielo.br/j/rbz/a/jrjyBNskqs76BTPBp3pZgHt/?format=pdf&lang=en
942			_cANA
999			_c330817 _d330817