Selection of a suitable definition of environment for the estimation of genotype × environment interaction in the weaning weight of beef cattle

Vostrý, L.; Přibyl, J.; Jakubec, V.; Veselá, Zdenka; Majzlík, I.

doi:10.17221/351-cjas

Cited by 7 publications

(8 citation statements)

References 24 publications

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“…Evaluations are generally oriented to the MT‐AM (multi‐trait animal model), RR‐TDAM (random regression test‐day animal model), AM‐maternal, and nonlinear methodologies for survival (kit) analysis 13–23…”

Section: Animal Evaluationmentioning

confidence: 99%

Excited State Properties and Energy Transfer within Dipyrrin‐Based Binuclear Iridium/Platinum Dyads: The Effect of ortho‐Methylation on the Spacer

Bronner

Veiga

Guenet

et al. 2012

Chemistry A European J

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Luminescent cyclometalated iridium complexes based on pyridyl appended dipyrrin ligands were prepared and characterized both in the solid state and in solution. The functionalization of the peripheral pyridyl moiety causes dramatic changes on the emission properties of both mono- and hetero- binuclear complexes. A detailed photophysical investigation of the two mononuclear derivatives of the [(Ppy)(2)Ir(dpm-py)] family (Ppy=2-phenylpyridine, dpm-py=5-(4-pyridyl)dipyrrin) was carried out. Introduction of methyl groups at the 3 and 5 positions on the pyridyl unit diminishes the non-radiative rate constant by locking the peripheral pyridyl group orthogonally to the dipyrrinato plane. Thus, they limit the rotational degree of freedom, as well as the charge-transfer character of the excited state. The coordination of these two complexes to a cyclometalated [(dppy)Pt] fragment (dppy=2,6-diphenylpyridine) led to the formation of binuclear species in which the iridium and platinum complexes behave as acceptors and donors, respectively. In these heterobinuclear compounds, the methyl groups do not influence the energy transfer efficiency, which is estimated to be above 90 %. However, they do limit the charge-transfer character of the acceptor's excited state, as well as its rotational degree of freedom, thus avoiding the detrimental effect upon the photophysical performance.

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Section: Animal Evaluationmentioning

confidence: 99%

Excited State Properties and Energy Transfer within Dipyrrin‐Based Binuclear Iridium/Platinum Dyads: The Effect of ortho‐Methylation on the Spacer

Bronner

Veiga

Guenet

et al. 2012

Chemistry A European J

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“…the territory with a lower production potential. Locality 3 represented intensive production areas with the high production capacity of soil (hereinafter localities 1, 2 and 3) (VOSTRÝ et al 2008). Table 1 shows the characteristics of a sampling set for the particular localities.…”

Section: Localitiesmentioning

confidence: 99%

“…by KŘÍŽEK et al (1992), BROWN et al (1993), SANDELIN et al (2002) andVOSTRÝ et al (2008), and animal × environment interaction (within breed interaction), which was studied e.g. by NOTTER et al (1992) and DE MATTOS et al (2000).…”

Section: Introductionmentioning

confidence: 99%

Estimation of animal × environment interaction in Czech beef cattle

Vostrý

Přibyl

Schlote³

et al. 2009

Arch. Anim. Breed.

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The objective was the estimation of animal × environment interaction for weaning weight (WWT) of the most frequent breeds of beef cattle in the Czech Republic. The environment was represented by 3 areas: Mountain (1), Foothills (2) and Lowland (3). A pairwise analysis was carried out between the areas: 1 vs 2 (n=5 149) and 2 vs 3 (n=4 971) for the estimation of (co)variance components and genetic correlations between the environments. A multiple-trait animal model was used where weaning weights in different areas were considered as different traits. The direct and maternal heritability estimates of WWT were for area (1): 0.12 (direct) and 0.05 (maternal); for (2): 0.26 and 0.11 (direct), 0.10 and 0.11 (maternal) and for (3): 0.26 (direct) 0.03 (maternal). Direct and maternal genetic correlations were between: 1 and 2 0.98 and 0.65 respectively, with standard deviations 0.03 and 0.37 respectively, and between 2 and 3: 0.82 and 0.50 respectively, with standard deviations 0.12 and 0.31 respectivly. The magnitude of the across-areas genetic correlation indicates that the animal by environment interaction was not biologically important and can be ignored in the evaluation of beef cattle in the Czech Republic. Keywords

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“…These authors stated that the evaluation of growth on the basis of weight gains in consecutive growth segments was more suitable than evaluation according to body weights because it is possible to determine more exactly the effects of fixed and random environment which influence the animal growth during particular periods. In recent years great progress has been made in beef cattle breeding in the Czech Republic and other countries (Přibyl et al 2003, Vostrý et al 2007, Vostrý et al 2008, Vostrý et al 2009, Bene et al 2010, Zahrádková et al 2010, Veselá et al 2011.…”

Section: Introductionmentioning

confidence: 99%

Genetic parameters for growth of young beef bulls

2012

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Abstract. The average daily gains of young bulls on test stations (ADGT) were analysed for the most frequent breeds of beef cattle in the Czech Republic using a multiple-trait animal model. Body weights at birth (W0), at 120 days of age (W120) and at weaning at 210 days (WW) were considered in this model as pre-weaning growth. The tested models comprised some of the random effects: direct genetic effect, maternal genetic effect, permanent animal environment effect, permanent maternal environment effect, and some of the fixed effects: dam’s age, sex, herd-year-season, linear and quadratic regression on age at the beginning of the test. For optimization of the models Akaike information criterion (AIC), residual variance and likelihood ratio test were used. Coefficients of direct and maternal heritability across breeds of about 0.25 for W0, about 0.17 for W120, about 0.17 for WW and about 0.29 for ADGT were estimated by all models. All criteria selected models including the permanent animal environment effect, which was the most important effect in the model.

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Selection of a suitable definition of environment for the estimation of genotype × environment interaction in the weaning weight of beef cattle

Cited by 7 publications

References 24 publications

Excited State Properties and Energy Transfer within Dipyrrin‐Based Binuclear Iridium/Platinum Dyads: The Effect of ortho‐Methylation on the Spacer

Excited State Properties and Energy Transfer within Dipyrrin‐Based Binuclear Iridium/Platinum Dyads: The Effect of ortho‐Methylation on the Spacer

Estimation of animal × environment interaction in Czech beef cattle

Genetic parameters for growth of young beef bulls

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