Genotype × birth type or rearing-type interactions for growth and ultrasound scanning traits in Merino sheep

2019 ◽  
Vol 59 (6) ◽  
pp. 1016
Author(s):  
A. Dakhlan ◽  
N. Moghaddar ◽  
J. H. J. van der Werf
Keyword(s):  
Univariate Analysis ◽  
Breeding Value ◽  
Bivariate Analysis ◽  
Environment Interaction ◽  
Eye Muscle ◽  
Weaning Weight ◽  
Merino Sheep ◽  
Genotype Environment Interaction ◽  
Genetic Potential ◽  
Birth Type

This study explores the interaction between genetic potential for growth in Merino lambs and their birth type (BT) or rearing type (RT). Data on birthweight (BWT), weaning weight (WWT), post-weaning weight (PWWT), scan fat (PFAT) and eye muscle depth (PEMD) were used from 3920 single and 4492 twin-born lambs from 285 sires and 5279 dams. Univariate analysis showed a significant sire × BT interaction accounting for 1.59% and 2.49% of the phenotypic variation for BWT and WWT, respectively, and no significant effect for PWWT, PFAT and PEMD. Sire × RT interaction effects were much smaller and only significant for PEMD. Bivariate analysis indicated that the genetic correlation (rg) between trait expression in lambs born and reared as singles versus those born and reared as twins were high for BWT, WWT, PWWT (0.91 ± 0.02 – 0.96 ± 0.01), whereas rg for PFAT and PEMD were lower (0.81 ± 0.03 and 0.86 ± 0.02). The rg between traits expressed in lambs born and reared as singles versus those born as twins but reared as singles were lower: 0.77 ± 0.08, 0.88 ± 0.03, 0.66 ± 0.06 and 0.61 ± 0.08 for WWT, PWWT, PFAT and PEMD, respectively. A different RT only affected the expression of breeding values for PFAT and PEMD (rg 0.62 ± 0.04 and 0.47 ± 0.03, respectively). This study showed genotype × environment interaction for BWT and WWT (sire × BT interaction) and for PEMD (sire by RT interaction). However, sires’ breeding value of a model that accounts for sire × BT interaction provides a very similar ranking of sires compared with a model that ignores it, implying that there is no need to correct for the effect in models for genetic evaluation.

Genotype by environment interaction for yearling weight in Nellore cattle applying reaction norms models

2018 ◽  
Vol 58 (11) ◽  
pp. 1996
Author(s):  
S. Ribeiro ◽  
J. P. Eler ◽  
V. B. Pedrosa ◽  
G. J. M. Rosa ◽  
J. B. S. Ferraz ◽  
...  
Keyword(s):  
Genetic Correlation ◽  
Environmental Gradient ◽  
Genotype By Environment Interaction ◽  
Reaction Norms ◽  
Breeding Value ◽  
Environment Interaction ◽  
Genotype By Environment ◽  
Genotype Environment Interaction ◽  
Nellore Cattle ◽  
Gradient Variation

In the present study, a possible existence of genotype × environment interaction was verified for yearling weight in Nellore cattle, utilising a reaction norms model. Therefore, possible changes in the breeding value were evaluated for 46 032 animals, from three distinct herds, according to the environmental gradient variation of the different contemporary groups. Under a Bayesian approach, analyses were carried out utilising INTERGEN software resulting in solutions of contemporary groups dispersed in the environmental gradient from –90 to +100 kg. The estimates of heritability coefficients ranged from 0.19 to 0.63 through the environmental gradient and the genetic correlation between intercept and slope of the reaction norms was 0.76. The genetic correlation considering all animals of the herds in the environmental gradient ranged from 0.83 to 1.0, and the correlation between breeding values of bulls in different environments ranged from 0.79 to 1.0. The results showed no effect of genotype × environment interaction on yearling weight in the herds of this study. However, it is important to verify a possible influence of the genotype × environment in the genetic evaluation of beef cattle, as different environments might cause interference in gene expression and consequently difference in phenotypic response.

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

2008 ◽  
Vol 53 (No. 10) ◽  
pp. 407-417 ◽  
Author(s):  
L. Vostrý ◽  
J. Přibyl ◽  
V. Jakubec ◽  
Z. Veselá ◽  
I. Majzlík
Keyword(s):  
Beef Cattle ◽  
Evaluation Model ◽  
Economic Value ◽  
Information Criterion ◽  
Ratio Test ◽  
Residual Variance ◽  
Environment Interaction ◽  
Weaning Weight ◽  
Genotype Environment Interaction ◽  
And Performance

Genotype by environment interactions for weaning weight in beef cattle were tested using several definitions of environments. Four breeds of beef cattle (Hereford, Aberdeen Angus, Beef Simmental, and Charolais) were represented. The environments were defined according to five criteria: altitude, production areas, economic value of the land, less favourable areas, and performance levels of a breed within herds. Ten mixed models were compared including the effects of direct and maternal genetics, herd-year-season, maternal permanent environmental, breed, environment, genotype × environment interaction, sex of calf, and age of dam. The suitability of the models was tested by Akaike’s Information Criterion, likelihood ratio test, and magnitude of the residual variance. The most suitable definitions of environment were less favoured areas and herd levels of performance. Estimates of direct heritability ranged from 0.07 to 0.19. Genotype × environment interactions should be included in a genetic evaluation model for interbreed comparisons of beef cattle in the Czech Republic.

DESEMPENHO AGRONÔMICO E ESTABILIDADE DE TOPCROSSES DE MILHO AVALIADOS EM MINAS GERAIS E PARANÁ

2018 ◽  
Vol 17 (2) ◽  
pp. 303
Author(s):  
ANDRÉ GABRIEL ◽  
MARCOS VENTURA FARIA ◽  
GUILHERME MENDES BATTISTELLI ◽  
EVANDREI SANTOS ROSSI ◽  
CARLOS AUGUSTO DA SILVA ◽  
...  
Keyword(s):  
Plant Height ◽  
Minas Gerais ◽  
Environment Interaction ◽  
Agronomic Performance ◽  
Maize Hybrids ◽  
Genotype X Environment ◽  
Lattice Design ◽  
Genotype Environment Interaction ◽  
Genetic Potential ◽  
Ear Height

 RESUMO – O objetivo deste trabalho foi avaliar o desempenho agronômico e estabilidade fenotípica de híbridos topcrosses de milho oriundos do cruzamento com uma linhagem elite (testador), em quatro ambientes (Guarapuava- PR, Candói-PR, Guarda-Mor-MG e Paracatu-MG), utilizando os métodos Annicchiarico e AMMI para selecionar linhagens com elevado potencial genético. Foram avaliados 88 híbridos topcrosses e 12 híbridos comerciais (2B688, AG9010, AS1575, DKB390, GNZ2500, GNZ8132, GNZ9501, GNZ9505, P30F53, P30R50, P30F35 e Penta). O delineamento utilizado foi o látice triplo 10x10 e foram avaliadas as características agronômicas altura de planta (AP), altura de espiga (AE) e estabilidade produtiva de grãos (PG). Observou-se efeito significativo para genótipo, ambiente e interação genótipo x ambiente para a PG. A média de produtividade dos genótipos foi maior em Paracatu-MG (11.100 kg ha-1) que em Candói (9.654 kg ha-1), Guarapuava (9.456 kg ha-1) e Guarda-Mor (9.446 kg ha-1). Com base nos resultados de PG e estabilidade utilizando os métodos Annicchiarico e AMMI, o híbrido topcross HTC 136 mostrou ser o melhor para seguir no programa de melhoramento no processo de endogamia.Palavras-chave: Annicchiarico, AMMI, interação genótipo x ambiente, testador, Zea mayz L. AGRONOMIC PERFORMANCE AND STABILITY OF MAIZE TOPCROSSES IN MINAS GERAIS AND PARANÁ ABSTRACT – The objective of this study was to evaluate the agronomic performance and phenotype stability of top cross maize hybrids originated by crossing with an elite line (tester), in four environments (Guarapuava-PR, Candói- PR, Guarda-Mor-MG and Paracatu-MG), using the methods Annicchiarico and AMMI to select lines with high genetic potential. Thus, 88 top cross hybrids and 12 commercial hybrids (2B688, AG9010, AS1575, DKB390, GNZ2500, GNZ8132, GNZ9501, GNZ9505, P30F53, P30R50, P30F35 and Penta) were evaluated. The 10x10 triple lattice design was used evaluating the agronomic characteristics plant height (PH), ear height (EH) and yield stability of grain (YG). Significant differences were observed for genotype, environment and genotype x environment interaction for YG. The average productivity of the genotypes was superior in Paracatu-MG (11,100 kg ha-1) compared to Candói (9,654 kg ha-1), Guarapuava (9,456 kg ha-1) and Guarda-Mor (9,446 kg ha-1). The data on YG and stability using Annicchiarico and AMMI methods showed that the top cross hybrid HTC 136 is suitable to continue in the inbreeding process of the breeding program.Keywords: Annicchiarico, AMMI, genotype-environment interaction, tester, Zea mayz L.

Genotype×environment interaction for weaning weight in Nellore cattle using reaction norm analysis

2015 ◽  
Vol 176 ◽  
pp. 40-46 ◽  
Author(s):  
S. Ribeiro ◽  
J.P. Eler ◽  
V.B. Pedrosa ◽  
G.J.M. Rosa ◽  
J.B.S. Ferraz ◽  
...  
Keyword(s):  
Reaction Norm ◽  
Environment Interaction ◽  
Weaning Weight ◽  
Genotype Environment Interaction ◽  
Nellore Cattle

scholarly journals Genotype × country interaction for weaning weight in the Angus populations of Brazil and Uruguay

2011 ◽  
Vol 40 (3) ◽  
pp. 568-574 ◽  
Author(s):  
Ana Carolina Espasandin ◽  
Jorge Ignacio Urioste ◽  
Leonardo Talavera Campos ◽  
Maurício Mello de Alencar
Keyword(s):  
Fixed Effects ◽  
Environment Interaction ◽  
Month Of Birth ◽  
Weaning Weight ◽  
Additive Genetic Correlation ◽  
Genotype Environment Interaction ◽  
The One ◽  
Genetic Evaluations ◽  
Moderate Magnitude ◽  
Country Effect

It was analyzed the existence of genotype × environment interaction for weaning weight in populations of Angus from Brazil and Uruguay by using records of 73,205 animals (10,257 from Uruguay and 62,948 from Brazil) belonging to 33 and 161 farms and 13 and 34 regions in Uruguay and Brazil, respectively. It was used the one- and two-trait animal model analyses considering weight at weaning of each country as different characters. Coefficients of direct and maternal additive-genetic correlation estimated by two statistical models (including or not bull × country effect) Models included the fixed effects of contemporary group (herd-year and month of birth), sex of the calf, the covariates age of dam at calving (years) and age of calf at weaning (days), and the random effects genetic-additive maternal and direct, maternal permanent environment and residual. Herdabilidades (of direct effect) were similar in both countries and with moderate magnitude (0.35 and 0.15, respectively). Coeficients of correlation among maternal and direct genetic effects between Brazil and Uruguay were 0.77 and 0.13, respectively, and comparison among models (with and without bull × country effect) showed significant differences. Correlations among classifications (ranking of genetic values) of bulls with progenie in both countries ranged from 0.35 to 0.41 for estimations in one- and two-trait models, respectively. The results suggest the existence of genotype × environment interaction for weight at weaning of Angus populations between Brazil and Uruguay. There is a need of considering interaction in further international genetic evaluations of the breed.

Response to selection and genotype–environment interaction in mink (Neovison vison) selected on ad libitum and restricted feeding

2011 ◽  
Vol 91 (2) ◽  
pp. 231-237 ◽  
Author(s):  
Vivi Hunnicke Nielsen ◽  
Steen Henrik Møller ◽  
Bente Krogh Hansen ◽  
Peer Berg
Keyword(s):  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Breeding Value ◽  
Environment Interaction ◽  
Restricted Feeding ◽  
Response To Selection ◽  
Feed Conversion ◽  
Genotype Environment Interaction ◽  
Ad Libitum ◽  
Ad Libitum Feeding

Nielsen, V. H., Møller, S. H., Hansen, B. K. and Berg, P. 2011. Response to selection and genotype-environment interaction in mink (Neovison vison) selected on ad libitum and restricted feeding. Can. J. Anim. Sci. 91: 231–237. Mink were selected for high November weight (AL line) and low feed conversion ratio (FC line) on ad libitum feeding and for high November weight on restricted feeding (RF line). After three generations of selection, the average estimated breeding value for November weight was 533, 326, and 150 g in males and 168, 82, and −85 g in females in the AL, RF, and FC lines. The breeding value for feed conversion ratio was −1.39, −0.84 and −0.68 kg feed kg−1 gain in males and −0.39, −0.31 and −0.23 kg feed kg−1 gain in females in the selection lines. In generation 4, the AL, RF and FC lines were tested on both ad libitum and restricted feeding. The estimated breeding value for November weight in males in the AL line (533 g) was significantly greater than that in the RF line (384 g) on ad libitum feeding. The corresponding values on restricted feeding were 297 and 326 g, respectively, which were not significantly different. This indicates genotype×environment interaction. In the AL line, selection improved feed conversion ratio by increased appetite. In the RF line, it was improved by increased feed utilization. Environmental sensitivity in males, estimated from breeding values for November weight was 236 g in the AL line and 58 g in the RF line suggesting that the RF line was more robust to changes in feeding conditions. A smaller litter size in the AL line (4.1) than in the RF line (5.6) indicates that selection for large weight affects reproduction.

scholarly journals Evaluation of the source material of winter triticale in breeding varieties of grain feed direction for the foothill zone of the Central Caucasus

2020 ◽  
Vol 202 (11) ◽  
pp. 21-27
Author(s):  
I. Manukyan ◽  
E. Miroshnikova ◽  
Tamara Abieva
Keyword(s):  
Source Material ◽  
Productivity Index ◽  
Breeding Value ◽  
Environment Interaction ◽  
Potential Productivity ◽  
Winter Triticale ◽  
Genotype Environment Interaction ◽  
Feed Direction ◽  
Central Caucasus ◽  
Economically Valuable Traits

Abstract. The purpose of the work is to evaluate the source material of winter triticale for economically valuable traits for breeding varieties of grain and forage directions. Methods. The objects of study were winter triticale varieties of various ecological and geographical origin: Hortenso, Moderato (Poland), Prader (Switzerland), TGI 22/1, GR-16/2 (Russia), KS 88 T 142 (USA). Variety Valentin 90 was taken as a standard. Phenological observations and counts were carried out according to the method of state variety testing. The variability of winter triticale varieties was evaluated in the experiment with mowing shoots in the stalking phase at a height of 5 cm, at the test sites in triplicate. When evaluating the genotype-environment interaction, the Plant Productivity Index (PPI) was used. To assess the adaptability of genotypes to cultivation conditions, statistical methods were used to assess the plasticity and stability of varieties. Results. It was established that yields above 1 t/ha on average for three years were shown by variety varieties: Moderato (1.05 t/ha), GR 16/2 (1.14 t/ha) and Hortenso (1.19 t/ha). According to the values of the PPI, the variety specimens are highly productive: Valentin 90 (13.2), Hortenso (12.7), GR 16/2 (13.5), Moderato (11.6). In terms of ecological plasticity, the variety samples were divided into groups: the bi value is close to one – varieties well adapted to the conditions of the region (Prader, Hortenso, GR 16/2), extensive varieties – bi less than one (KS 88 T 142), intensive varieties – bi more units (Valentin 90, TGI 22/1, Moderato). According to the indicators of homeostaticity and breeding value, the variety samples were distributed in the following order, with decreasing values: Hortenso, GR-16/2, Valentin 90, Prader, TGI 22/1, Moderato, KS 88 T 142. Additional data were obtained by the method of provocative beveled plots, to determine potential productivity and regrowth. The best regenerative ability was shown by the variety samples: Hortenso, GR 16/2, Moderato, Prader. The scientific novelty lies in the fact that, for the conditions of the foothill zone of the Central Caucasus, promising winter triticale varieties were identified that can be used in breeding varieties of grain and feed direction: Hortenso, GR 16/2, Moderato, Prader.

scholarly journals Integrating Multivariate and Univariate Statistical Models to Investigate Genotype–Environment Interaction of Advanced Fragrant Rice Genotypes under Rainfed Condition

2021 ◽  
Vol 13 (8) ◽  
pp. 4555
Author(s):  
Norainy Hashim ◽  
Mohd Y. Rafii ◽  
Yusuff Oladosu ◽  
Mohd Razi Ismail ◽  
Asfaliza Ramli ◽  
...  
Keyword(s):  
High Stability ◽  
Block Design ◽  
Univariate Analysis ◽  
Primary Objective ◽  
Environment Interaction ◽  
Fragrant Rice ◽  
Commercial Cultivation ◽  
Genotype Environment Interaction ◽  
Premium Price ◽  
Second Category

Specialty fragrant rice is sold at a premium price in both local and international trade because of its superior grain qualities. In this research, 40 advanced fragrant rice accessions were evaluated in different environments. The primary objective was to identify genotypes with high grain yield and high stability using multivariate (GGE biplot) and univariate analysis (regression slope, deviation from regression, Shukla’s stability variance, Wricke’s ecovalence, and Kang’s stability statistic). The field experiment trials were laid in a randomized complete block design in three replications. The analysis of variance showed highly significant differences among genotypes, locations, seasons, and the interactions between genotype, locations, and seasons. The environment significantly explained about 43.32% (37.01 and 6.31% for locations and seasons) of the total sum of squares. Based on average ranking generated from multivariate and univariate stability measured, rice accessions were classified into three major categories, viz., genotypes having high trait performance, and high stability as category 1. The second category consists of genotypes that exhibit high mean performance but low stability, while the third category includes genotypes with high stability but low trait performance. Our results showed that breeding for yield performance was possible, and the identified genotypes could be recommended for commercial cultivation.

FAKTOR-FAKTOR YANG BERHUBUNGAN DENGAN KEJADIAN KEKURANGAN ENERGI KRONIS PADA IBU HAMIL

2017 ◽  
Vol 2 (3) ◽  
Author(s):  
Febriyeni Febriyeni
Keyword(s):  
Pregnant Women ◽  
Health Center ◽  
Negative Impact ◽  
Univariate Analysis ◽  
Good Condition ◽  
Health Centers ◽  
Bivariate Analysis ◽  
Cross Sectional ◽  
Energy Deficiency ◽  
Chronic Energy Deficiency

<pre>Chronic Energy Deficiency is a situation where the nutritional status someone is on the Less Good Condition. Among the 22 health centers in the district of Lima Puluh Kota, CED highest coverage at the health center are Banja Laweh Namely Case 17 (16.50%) of 103 pregnant mothers. Preliminary Survey of 10 pregnant women at health centers Banja Laweh, note 4 people (40%) of them suffered CED. Based on the findings of interviews stating Not pregnant women know the importance of the size upper arm circumference on Against her pregnancy, in addition to pregnant women consume no food Diversified, because lust Eating Less and Economics not sufficient. Objectives for review determine factors related to the occurrence of Chronic energy deficiency on pregnant women. Methods descriptive analytic with cross sectional approach. Data collection is done on Date in January-February 2017. CASE is a whole population of pregnant women in the region are working Health Center Banja Laweh Year 2017, amounted to 55 people, with sampling total sampling. Operating data analysis using univariate and bivariate statistical test Chi Square. Results of univariate analysis 87,3% of respondents experienced Genesis not CED, (60,0%) High Knowledge, (56,4%) Economy High, and 61,8% of Eating Well. Bivariate analysis known Relationship of Knowledge (p = 0.013 and OR = 12,000, Economics (p = 0.035 and OR = 10,000), and Diet (p = 0.019 and OR = 13,200) with the Genesis CED pregnant women. Can be concluded that the factors related to the occurrence of CED pregnant women is Science, Economics and the Diet. Expected to conduct monitoring of the health center and Supervision of pregnant women at risk Against The Genesis CED, so the negative impact of the CED can be addressed early on.</pre>

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