Genotype × environment interaction effects on carcass traits in Japanese Black cattle1

Ibi, Takayuki; Hirooka, Hiroyuki; Kahi, A.K.; Sasae, Y.; Sasaki, Yoshiyuki

doi:10.2527/2005.8371503x

Cited by 30 publications

(30 citation statements)

References 18 publications

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“…Their results showed little evidence of G 3 E for any of the traits across those environments. Ibi et al (2005) examined the effects of G 3 E interactions on carcass quality attributes in Japanese Black cattle that originated in either Tohoku (20 106 animals born in a cold environment with large differences in temperature between summer and winter) or Kyusyu (34 670 animals born in a relatively warm climate throughout the year), with half of each cohort transferred to the alternate environment. A total of 54 776 carcass records were available for the study.…”

Section: G 3 E Interactionsmentioning

confidence: 99%

Importance of adaptation and genotype × environment interactions in tropical beef breeding systems

Burrow

2012

Animal

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This paper examines the relative importance of productive and adaptive traits in beef breeding systems based on Bos taurus and tropically adapted breeds across temperate and (sub)tropical environments. In the (sub)tropics, differences that exist between breeds in temperate environments are masked by the effects of environmental stressors. Hence in tropical environments, breeds are best categorised into breed types to compare their performance across environments. Because of the presence of environmental stressors, there are more sources of genetic variation in tropical breeding programmes. It is therefore necessary to examine the genetic basis of productive and adaptive traits for breeding programmes in those environments. This paper reviews the heritabilities and genetic relationships between economically important productive and adaptive traits relevant to (sub)tropical breeding programmes. It is concluded that it is possible to simultaneously genetically improve productive and adaptive traits in tropically adapted breeds of beef cattle grazed in tropical environments without serious detrimental consequences for either adaptation or production. However, breed-specific parameters are required for genetic evaluations. The paper also reviews the magnitude of genotype 3 environment (G 3 E) interactions impacting on production and adaptation of cattle, where 'genotype' is defined as breed (within a crossbreeding system), sire within breed (in a within-breed selection programme) or associations between economically important traits and single nucleotide polymorphisms (SNPs -within a marker-assisted selection programme). It is concluded that re-ranking of breeds across environments is best managed by the use of the breed type(s) best suited to the particular production environment. Re-ranking of sires across environments is apparent in poorly adapted breed types across extreme tropical and temperate environments or where breeding animals are selected in a temperate environment for use in the (sub)tropics. However, G 3 E interactions are unlikely to be of major importance in tropically adapted beef cattle grazed in either temperate or (sub)tropical environments, although sex 3 environment interactions may provide new opportunities for differentially selecting to simultaneously improve steer performance in benign environments and female performance in harsher environments. Early evidence suggests that re-ranking of SNPs occurs across temperate and tropical environments, although their magnitude is still to be confirmed in well-designed experiments. The major limitation to genetic improvement of beef cattle over the next decade is likely to be a deficiency of large numbers of accurately recorded phenotypes for most productive and adaptive traits and, in particular, for difficult-to-measure adaptive traits such as resistance to disease and environmental stressors.

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Section: G 3 E Interactionsmentioning

confidence: 99%

Importance of adaptation and genotype × environment interactions in tropical beef breeding systems

Burrow

2012

Animal

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“…Such genotype x environment interaction can reduce the accuracy of the genetic analysis (Neser et al, 1996). If interactions exist between genotype and environment, the accuracy and reliability of such evaluations are overestimated (Ibi et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

The use of a cluster analysis in across herd genetic evaluation for beef cattle

Neser¹,

Erasmus²,

Scholtz³

2008

SA J. An. Sci.

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________________________________________________________________________________ AbstractTo investigate the possibility of a genotype x environment interaction in Bonsmara cattle, a cluster analysis was performed on weaning weight records of 72 811 Bonsmara calves, the progeny of 1 434 sires and 24 186 dams in 35 herds. The following environmental factors were used to classify herds into clusters: solution for herd effects corrected for year-season, sex, age of dam and age at weaning (indicative of the management level in a herd), herd size and average temperature and rainfall. Two different genetic analyses were performed. Breeding values obtained in a univariate analysis were used as basis for comparison to breeding values obtained from a multivariate analysis where weaning weight in each cluster was considered as a separate trait. Direct additive, maternal additive, permanent maternal environment and Herd-YearSeason x Sire (HYSxS) interaction were included as random effects in both analyses. The direct genetic correlations between the clusters varied between 0.51 and 1.00. The low correlation estimates between some of the clusters indicate a possible genotype x environment interaction. Substantial reranking of sires between clusters did occur. However, further research is needed to identify and prioritize variables that can describe the genetics, management and climate of each herd more accurately.

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“…Ibi et al (5) suggested the G x E interaction is of biological and agricultural importance if the genetic correlation for the same trait in different environments is less than 0.80. With this threshold, only estimates of genetic correlations for weaning weight were above the threshold of biological importance of G x E interaction (Table 5).…”

Section: Resultsmentioning

confidence: 99%

“…In this sense, different thresholds have been suggested to measure the significance of this type of interaction (5) . Frstly, however, it seems that checking and discussing this phenomenon is the most fortunate way to encourage the adoption of this approach in Brazil.…”

Section: Introductionmentioning

confidence: 99%

Climate Spatialization and Genotype-Environment Interaction Effects on Weaning Weights of Nellore Cattle in Extensive Systems in Tropical Regions of Brazil

Ferreira

Lopes²,

Garcia

et al. 2017

Ciênc. anim. bras.

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Depending on the environmental differences among the regions, the phenotypic expression in beef cattle may significantly vary between the progenies of the same sire, and this is an important rule to identify the best animal. Thus, this study was carried out to spatialize environmental factors that may help to compare and discriminate the states of Maranhão, Pará, and Tocantins and also to check for genotype x environment interaction (G x E interaction) in these regions. The environmental variables analyzed were: maximum temperature; minimum temperature; mean temperature; precipitation; normalized difference vegetation index; relative humidity; altitude; and index of temperature and humidity. Records of weaning weight of Nellore cattle raised on pasture were collected between the years of 1997 and 2007. The dataset was constituted of 21.117 animals, progenies of 161 sires. (Co)variance components and breeding values were estimated using the multiple-trait derivative-free restricted maximum likelihood method. Multivariate spatialization revealed clear distinction among the States of Maranhão, Pará, and Tocantins and allowed the identification of important environmental variables for discrimination. The estimate for direct heritability showed moderate magnitudes and were 0.22±0013, 0.26±0.021, and 0.29±0023, for the 2 Cienc. anim. bras., Goiânia, v.18, 1-13, e-39597, 2017Climate espatialization and genotype-environment interaction effects… States of Maranhão, Pará, and Tocantins, respectively. The estimates of correlation between the breeding values, predicted in different States, as well as the genetic correlation for weaning weight showed that sire ranks changed among the States, indicating G x E interaction. There was a variation of the genetic response of the progeny, depending on the sire and on the State. Thus, the G x E interaction should be accounted for in the genetic evaluation of sires and the performance of Nellore cattle under extensive breeding systems in tropical regions of Brazil.Keywords: animal breeding; canonical correlation; cluster; heritability; Zebu. ResumoA expressão fenotípica pode variar significativamente sob diferenças climáticas e deve ser um motivo de preocupação na identificação e seleção de animais superiores no Brasil. Dessa forma, no presente estudo objetivou-se espacializar fatores ambientais para discriminar os estados do Maranhão (MA), Pará (PA) e Tocantins (TO) e verificar presença de interação genótipo-ambiente (IGA) para peso ao desmame em rebanhos bovinos da raça Nelore localizados nestes Estados. As variáveis ambientais analisadas foram: temperatura máxima; temperatura mínima; temperatura média; precipitação; índice vegetativo normalizado; umidade relativa; altitude e índice de temperatura e umidade. Os registros de peso a desmama de bovinos da raça Nelore criados à pasto foram coletados entre os anos de 1997 e 2007 e o conjunto de dados constituído por 21.117 animais, filhos de 161 touros comuns aos Estados do MA, PA e TO. As estimativas para herdabilidades direta ...

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Genotype × environment interaction effects on carcass traits in Japanese Black cattle1

Cited by 30 publications

References 18 publications

Importance of adaptation and genotype × environment interactions in tropical beef breeding systems

Importance of adaptation and genotype × environment interactions in tropical beef breeding systems

The use of a cluster analysis in across herd genetic evaluation for beef cattle

Climate Spatialization and Genotype-Environment Interaction Effects on Weaning Weights of Nellore Cattle in Extensive Systems in Tropical Regions of Brazil

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