Maternal effects due to cytoplasmic inheritance in dairy cattle. Influence on milk production and reproduction traits

Huizinga, H.A; Korver, S.; McDaniel, B.T.; Politiek, R.D.

doi:10.1016/0301-6226(86)90051-5

Cited by 42 publications

(25 citation statements)

References 27 publications

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“…Some evidence suggests that maternal lineage effects, considered as cytoplasmic line effects, can affect yield and reproductive traits of dairy (2,12,19) and beef ( 2 3 ) cows. A significant effect of cytoplasmic inheritance on milk yield also was described for beef cows (23).…”

Section: Introductionmentioning

confidence: 99%

Variances of Direct Genetic Effects, Maternal Genetic Effects, and Cytoplasmic Inheritance Effects for Milk Yield, Fat Yield, and Fat Percentage

Albuquerque

Keown

Vleck

1998

Journal of Dairy Science

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Milk yield, fat yield, and fat percentage during the first three lactations were studied using New York Holsteins that were milked twice daily over a 305-d, mature equivalent lactation. Those data were used to estimate variances from direct and maternal genetic effects, cytoplasmic effects, sire by herd interaction, and cow permanent environmental effects. Cytoplasmic line was traced to the last female ancestor using DHI records from 1950 through 1991. Records were 138,869 lactations of 68,063 cows calving from 1980 through 1991. Ten random samples were based on herd code. Samples averaged 4926 dams and 2026 cytoplasmic lines. Model also included herd-year-seasons as fixed effects and genetic covariance for direct-maternal effects. Mean estimates of the effects of maternal genetic variances and directmaternal covariances, as fractions of phenotypic variances, were 0.008 and 0.007 for milk yield, 0.010 and 0.010 for fat yield, and 0.006 and 0.025 for fat percentage, respectively. Average fractions of variance from cytoplasmic line were 0.011, 0.008, and 0.009 for milk yield, fat yield, and fat percentage. Removal of maternal genetic effects and covariance for maternal direct effects from the model increased the fraction of direct genetic variance by 0.014, 0.021, and 0.046 for milk yield, fat yield, and fat percentage; little change in the fraction was due to cytoplasmic line. Exclusion of cytoplasmic effects from the model increased the ratio of additive direct genetic variance to phenotypic variance by less than 2%. Similarly, when sire by herd interaction was excluded, the ratio of direct genetic variance to phenotypic variance increased 1% or less.(

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Section: Introductionmentioning

confidence: 99%

Variances of Direct Genetic Effects, Maternal Genetic Effects, and Cytoplasmic Inheritance Effects for Milk Yield, Fat Yield, and Fat Percentage

Albuquerque

Keown

Vleck

1998

Journal of Dairy Science

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“…3.5% of total variation in milk yield, milk fat yield, 3.7% fat-corrected milk yield, and milk fat percent in first lactation records of Holsteins from herds of the North Carolina Department of Agriculture and the North Carolina State University. Huizinga et al (3) reported that cytoplasmic origin is associated with significant effects on energy yield (protein plus fat) based on analysis of first lactation production of 290 cows tracing in two and three generations to 66 and 39 cytoplasmic lines, respectively. Kennedy (7), however, has shown by simulation that such results may be due to genetic drift.…”

Section: Introductionmentioning

confidence: 99%

Lack of Evidence of Cytoplasmic Inheritance in Milk Production Traits of Dairy Cattle

Reed

Vleck

1987

Journal of Dairy Science

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Heritability estimates, by year of freshening of daughter, were obtained from daughter-dam and granddaughtergranddam regressions using 61,482 triply matched first lactations of artificially sired Holstein cows obtained from the Northeast Dairy Records Processing Laboratory. After adjusting for herd-yearseason effects, residual effects may include additive and other genetic effects of the animal, maternal effects, cytoplasmic effects, and other environmental effects. Analysis of residuals showed that cytoplasmic effects accounted for no variation in milk and fat yield and fat percent. Weighted yearly heritability estimates and standard errors from daughter on dam regressions were .35 + .01 for milk yield, .30 + .01 for milk fat yield, and .63 -+ .01 for milk fat percent and from daughter on granddam regressions were .34 -+ .03 for milk production, .28 -+ .03 for milk fat production, and .55 +-.03 for milk fat percent. The differences between daughter-dam and daughtergranddam heritability estimates, which estimate twice the fraction of variance due to cytoplasmic effects, were negative and not statistically significant for milk fat yield and also were negative but highly significant for milk fat percent.

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“…Os resultados de pesquisas obtidos com bovinos de leite (BELL et al, 1985;HUIZINGA et al, 1986) e suínos (DZPO e WASSMUTH, 1983;TOELLE et al, 1986) revelaram que a influência materna através do citoplasma deve ser considerada nos programas de melhoramento genético animal, tanto para remover esse efeito das estimativas dos valores genéticos quanto como possível fonte extra de variação genética.…”

Section: Rev Bras Zootec 30(1):101-108 2001unclassified

Efeito da linhagem citoplasmática sobre o peso ao nascer e o ganho médio diário na pré-desmama em bovinos da raça Caracu

Pelicioni

Queiroz

2001

R. Bras. Zootec.

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RESUMO -O objetivo do presente estudo foi avaliar o efeito da linhagem citoplasmática sobre as características peso ao nascer (PN) e ganho médio diário pré-desmama (GMD) de, respectivamente, 4.212 e 3844 registros de bezerros de um rebanho da raça Caracu. A linhagem citoplasmática (LC) foi estudada traçando-se o pedigree dos animais até as fêmeas fundadoras do rebanho. Com o intuito de apresentar estimativas de (co)variâncias e parâmetros genéticos para as características PN e GMD, incluindo-se ou não os componentes de efeito materno e de linhagem citoplasmática, foram realizadas análises sob seis diferentes modelos pelo método de máxima verossimilhança restrita livre de derivada. A variância de linhagem citoplasmática nos dois modelos que incluíram esse efeito apresentou-se muito baixa, fornecendo estimativas praticamente nulas, 0,6172x10 -5 e 0,1339x10 -5 ; 0,62557x10 -7 e 0,49502x10 -7 , para PN e GMD, respectivamente. O efeito de LC pode ser desconsiderado na modelagem das características PN e GMD de bovinos Caracu.Palavras-chave: bovino de dupla aptidão, efeito materno, herança citoplasmática, herdabilidade Effect of Cytoplasmic Lineage on Birth Weight and Pre Weaning Average Daily Gain of Caracu Cattle BreedABSTRACT -The objective of this research was to evaluate the effect of cytoplasmic lineage on birth weight (BW) and pre weaning average daily gain (ADG), respectively of 4,212 and 3,844 records of Caracu cattle breed. The cytoplasmic lineage of each cow was traced back to the first female ancestor in the maternal line of its pedigree. The estimates of (co) variances and genetic parameters for BW and ADG including or not the components of maternal and cytoplasmic lineage effects, performed by univariate analyses were evaluated according to six different models using the derivative-free restricted maximum likelihood method. The cytoplasmic lineage variance in the two models that included this effect was very low, 0.6172x10 -5 and 0.1339x10 -5 , 0.62557x10 -7 and 0.49502x10 -7 for BW and ADG, respectively. The cytoplasmic lineage effect could be neglected in the models of BW and ADG of Caracu cattle. IntroduçãoQuando se tem em vista apenas o genótipo de um indivíduo, a contribuição é exatamente ½ dos genes do pai e ½ dos genes da mãe. Entretanto, a contribuição da mãe para o fenótipo do seu filho se dá não só pela transmissão de efeitos aditivos, ou de efeitos genéticos totais, mas também por meio dos efeitos maternos.De acordo com HOHENBOKEN (1985), a definição de efeito materno é: "Qualquer contribuição, influência ou impacto sobre o fenótipo de um indivíduo que é atribuído diretamente ao fenótipo de sua mãe".Em melhoramento, o que se tenta modelar é a contribuição do fenótipo da mãe ou do efeito total da mãe sobre o fenótipo de seu filho.Diversos mecanismos biológicos explicam os efeitos maternos. Um destes mecanismos que contribuem para o efeito materno total é o DNA extranuclear, que consiste em herança citoplasmática, pois os elementos citoplasmáticos, principalmente a mitocôndria que contém DNA (mt...

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Maternal effects due to cytoplasmic inheritance in dairy cattle. Influence on milk production and reproduction traits

Cited by 42 publications

References 27 publications

Variances of Direct Genetic Effects, Maternal Genetic Effects, and Cytoplasmic Inheritance Effects for Milk Yield, Fat Yield, and Fat Percentage

Variances of Direct Genetic Effects, Maternal Genetic Effects, and Cytoplasmic Inheritance Effects for Milk Yield, Fat Yield, and Fat Percentage

Lack of Evidence of Cytoplasmic Inheritance in Milk Production Traits of Dairy Cattle

Efeito da linhagem citoplasmática sobre o peso ao nascer e o ganho médio diário na pré-desmama em bovinos da raça Caracu

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