Breeding value for stayability and productive traits of Saanen does obtained by survival analysis versus traditional genetic evaluation

2021 ◽  
pp. 106573
Author(s):  
Talita Andrade Ferreira ◽  
Gabriela Canabrava Gouveia ◽  
Luíza Rodrigues Alves Abreu ◽  
Elisandra Lurdes Kern ◽  
Aurora Maria Guimarães Gouveia ◽  
...  
Keyword(s):  
Survival Analysis ◽  
Genetic Evaluation ◽  
Breeding Value ◽  
Productive Traits

Evaluation Yorkshire and Landrace breeds of pigs according to PRKAG3, MC4R and MYOD1 marker genes

2021 ◽  
pp. 28-35
Author(s):  
A. Balnikov ◽  
I. Gridyushko ◽  
Yu. Kazutova ◽  
M. Mikhailova ◽  
E. Romanishko
Keyword(s):  
Molecular Genetic ◽  
Live Weight ◽  
Integrated System ◽  
The Body ◽  
Breeding Value ◽  
Feed Consumption ◽  
State Enterprise ◽  
Marker Genes ◽  
Productive Traits ◽  
Meat Productivity

Purpose: evaluation of pigs Yorkshire rocks and Landraz on PRKAG3, MC4R and MyOD1 markers.Materials and methods. The paper presents the analysis of the results of genetic testing, and determines the frequency of alleles and genotypes of Yorkshire and Landrace breeds at the State Enterprise ZhodinoAgroPlemElita" of the Minsk region of the Republic of Belarus by the genes-markers of productive traits: PRKAG3, MC4R and MYOD1. Zootechnical and molecular genetic methods were used in the research (PCR/PDRF). Snapshot analysis was developed for the genotyping of pigs to detect polymorphic markers of meat-feeding productivity of pigs on the Genas PRKAG3, MyOD1, MC4R. At the first stage, there was an assessment of tribal young (173 heads) on its own productivity in terms of indicators: the age of achieving the living mass of 100 kg, the average daily increase (d) from birth to the live weight of 100 kg, the length of the body (cm), the lifetime meat quality of the thickness of the scrape (mm), height of the longest back muscles (mm), the content of meat in the body (%). At the second stage of the research, the controlling fastenings of 200 goals of pigs and evaluation of feedst and meat qualities in the following indicators were carried out: the age of achieving a living mass of 100 kg (days), the average daily increase (d), feed consumption per 1 kg of growth (to. Units). Also determined: the length of the carcass (cm), the slaughter output (%), the thickness of the spick over 6-7 breast vertebrae (mm), the area of "muscular eye" (cm2), the mass of the rear third of the half carcass (kg), the flow of meat in the carcus (%). Then, genetic studies were compared with productivity indicators.Results. As a result of the research, it was found that in the tested animals, the frequency of the preferred allele I-PRKAG3 made 0.171-0.288, A-MC4R – 0.243-0.315, and C-MYOD1 – 0.064-0.477, respectively. The developed comprehensive system for assessing the breeding value of Yorkshire and Landrace pigs based on the marker genes PRKAG3, MC4R, and MYOD1 allowed us to identify the preferred alleles and determine correlation with productivity traits that provided increase in the average population values: for self-productivity - by 2-4%, for fattening traits - by 2.7-12.5%, for meat traits - by 2.8-34.4 %.Conclusion. The use of integrated system in pig breeding will speed up the selection work to increase the indicators of fattening and meat productivity of the created breeding herds of Yorkshire and Landrace pigs.

Population characteristics of daughters of domestic and foreign breeding bulls

2021 ◽  
Vol 1 (2) ◽  
pp. 29-35
Author(s):  
N. I. Abramova ◽  
◽  
O. L. Khromova ◽  
M. O. Selimyan ◽  
◽  
...  
Keyword(s):  
Genetic Structure ◽  
Milk Yield ◽  
Population Characteristics ◽  
Breeding Value ◽  
Black And White ◽  
Vologda Region ◽  
Breeding Work ◽  
White Breed ◽  
Productive Traits ◽  
Modern Population

The use of foreign-bred bulls leads to changes in the genetic structure of the black-and-white breed population, which affects the level of population characteristics. The study was conducted to study the comparative variability and heritability of productive and reproductive characteristics of daughters of sires of domestic and foreign selection in pedigree livestock 10 250 cows 1st calving modern population of black-motley breed of the Vologda region. The superiority of the offspring of foreign bulls in the average indicators of all the studied traits was established with confidence (P<0,001). There were no significant differences in the level of variability of the characteristics of the descendants of domestic and foreign bulls. According to productive traits, the greatest variability of indicators was established for milk yield for 305 days of the 1st lactation Cv = 17,3 – 17,7%, therefore, selection on this trait will be more effective. The greatest share of the influence of bullsfathers, both domestic and foreign selection, in the total sum of all factors determining the value of traits in the population of the black-and-white breed, is determined by the milk yield of daughters η2 = 0,22 – 0,24, the age of the 1st fruitful insemination and the first calving η2 = 0,24 – 0,25. In further breeding work with the breed, it is necessary to obtain and use domestic producers that exceed the breeding value of foreign bulls.

scholarly journals Restricted Selection Index to Relieve the Negative Repercussion in Reproductive Performance of Holstein Cows

2021 ◽  
Vol 10 (3) ◽  
pp. 202-207
Keyword(s):  
Repeated Measures ◽  
Selection Index ◽  
Reproductive Traits ◽  
Breeding Value ◽  
Holstein Cows ◽  
Sources Of Information ◽  
True Breeding ◽  
Productive Traits ◽  
Restricted Selection ◽  
True Breeding Value

The aim of this investigation was to develop restricted selection index aiming to improve 305-day yields of milk (MY), fat (FY) and protein (PY), while keeping the deterioration in days open (DO), calving interval (CI) and number of services per conception (NSPC) at minimum levels in Holstein cows. The data represent 3682 records of 1122 cows, daughters of 95 sires and 712 dams. The data were analyzed by multi-trait animal model with repeated measures. Eight selection indexes (five unrestricted and three restricted) were derived using MY, FY, PY, CI, DO and NSPC in various combinations as sources of information in the indexes. However, the true breeding value included MY, FY and PY. The highest accuracy of selection (0.60) resulted from selection based on the full index. Milk yield and SPC appeared to be the most valuable traits in the full index. Combining the two traits into one index (the best reduced index) gave 0.57 accuracy of selection. The index based on MY alone (the most accurate single trait index) gave 0.53 accuracy. It seems possible to reduce the expected genetic deterioration in the reproductive traits by restricting the full index to result in zero genetic change in NSPC (rTI=0.48). This restriction will allow the breeder to mitigate the deterioration in DO and CI by 12 and 16 days respectively, by sacrificing with part of the expected genetic improvement in productive traits (29, 40 and 48% in MY, FY and PY, respectively).

Genetic evaluation of animals with and without using genotypic data of major gene loci

2007 ◽  
Vol 2007 ◽  
pp. 153-153
Author(s):  
Mehdi Aminafshar ◽  
Mojtaba Hosseinpour Mashhadi ◽  
Laleh jamsi
Keyword(s):  
Quantitative Trait ◽  
Quantitative Traits ◽  
Gene Locus ◽  
Major Gene ◽  
Genetic Evaluation ◽  
Breeding Value ◽  
Major Genes ◽  
Accuracy Of Prediction

Now a days, scientists like to find about association of major genes and quantitative traits. In the first step, breeding value of quantitative trait should be predicted and genotype of animals for special major gene locus should be detected. Then, GLM analyses are used to compare all levels of genotypes and study about their association with quantitative traits. The accuracy of prediction of breeding value may influence the result of analyses. Different models with different accuracy of prediction may be utilized to predict breeding value. In this article, different models, with and without using the Genotypic Data of Major Genes Loci were used in order to identify the better model for genetic evaluation in this situation.

scholarly journals Survival Analysis Applied to Genetic Evaluation for Female Fertility in Dairy Cattle

2005 ◽  
Vol 88 (6) ◽  
pp. 2253-2259 ◽  
Author(s):  
M. del P. Schneider ◽  
E. Strandberg ◽  
V. Ducrocq ◽  
A. Roth
Keyword(s):  
Survival Analysis ◽  
Dairy Cattle ◽  
Genetic Evaluation ◽  
Female Fertility

Genetic Evaluation of Some Productive Traits in Maraz Goats

2020 ◽  
Vol 23 (2) ◽  
pp. 62-70
Author(s):  
Rabee A. S. Oramari
Keyword(s):  
Birth Weight ◽  
Milk Yield ◽  
Rank Correlation ◽  
Breeding Value ◽  
Model Program ◽  
Milk Traits ◽  
Weaning Weight ◽  
Time To Peak ◽  
Body Weights ◽  
Productive Traits

This study was carriedout at the private project of Maraz goats at Bamerny sub-district/Amadiya district /Duhok governorate/Kurdistan Region of Iraq, and consists of 71 does, 8 bucks, as well as 234, 171 and 162 kids at birth, weaning and six month of age, respectively during two kidding seasons (2015-2016) and (2016- 2017). Milk traits consist of 121 records of each daily (DMY), total (TMY), pre-weaning (PRMY), peak milk yield (PKMY) and time to peak (TPMY), and 120 records of post weaning milk yield (POMY). Animal Model Program for single trait was used to predict the breeding value (PBV) and the real producing ability (RPA) for animals depending on one trait and then these values were ranked in descending order for each sex for selection. Rank correlation was calculated between estimates for both kid body weights and milk yield traits. The average breeding values for sires, dams, male kids and female kids were 0.1322, 0.0845, 0.0369 and 0.0247 kg for birth weight and 0.9877, 0.6804, 2.0072 and -0.6406 kg for weaning weight and 1.4295, 2.0184, 3.0952 and -1.0623 kg for six-month weight, respectively. Rank correlation coefficient (P≤0.001) between the breeding value estimates of birth weight and each of weaning weight and six-month weight were 0.36 and 0.28, respectively and between weaning weight and six-month weight was 0.84. Also the average RPA of 71 dams was estimated depending on their kid body weights at birth, weaning and six-months old were 0.0784, 3.7027 and 4.9492 kg, respectively. Also rank correlations coefficient were estimated between real producing ability of birth weight and each of weaning weight and six-month weight were 0.37 and 0.26, respectively and between weaning weight and SMWT was 0.81. In addition, the average producing ability were estimated for 71 Maraz does depending on their (DMY), (TMY), (PRMY), (PRMY), (PKMY) and (TPMY) were 0.0312, - 7.0378, -3.6234, -2.4199, 0.0477 and 0.2724 kg, respectively. Also rank correlations between real producing ability of all milk traits have been estimated and it was significant except between TPMY and each DMY, PRMY and PKMY, the significant correlation between RPA of milk traits assist to select the best animals and improve the herd genetically.

ИСПОЛЬЗОВАНИЕ ОЦЕНОК БЫКОВ-ПРОИЗВОДИТЕЛЕЙ ПО ИНДЕКСАМ ПЛОДОВИТОСТИ ИХ ДОЧЕРЕЙ В УЛУЧШЕНИИ ВОСПРОИЗВОДИТЕЛЬНОЙ СПОСОБНОСТИ ЖИВОТНЫХ ГОЛШТИНСКОЙ ПОРОДЫ

2020 ◽  
pp. 14-18
Author(s):  
E.I. SAKSA
Keyword(s):  
Milk Fat ◽  
Negative Relationship ◽  
Conception Rate ◽  
Breeding Value ◽  
Reference Database ◽  
Leningrad Region ◽  
Productive Traits ◽  
The Impact ◽  
Fertility Traits ◽  
Domestic Breeding

Рассмотрена возможность использования оценки импортных быков по индексам плодовитости дочерей (HCR,DPR,CCRиFI). Выявлено, что у потомков импортных быков с положительными значениями индексовHCRиDPRв племзаводах Ленинградской области наблюдается хорошая оплодотворяемость телок после первого осеменения (74,374,7). У дочерей быков с отрицательным значениемHCR(от -0,1 до -2,7) иDPR(от -0,1 до -3,4) оплодотворяемость телок ниже (70,1). Все средние значения индексов (HCR,DPR,CCRиFI) имели отрицательную оценку. В группах отцов-быков с отрицательным значением индексов HCR (-0,1-2,7) и DPR (-0,1-3,4) самый высокий показатель племенной ценности отцов по удою составлял 660 кг и 610 кг молока, соответственно, из-за отрицательной зависимости между продуктивностью и плодовитостью. Для оценки дочерей быков отечественной селекции были использованы индексы плодовитости по К. Уилкоксу, КВС и Дохи. Установлено, что у дочерей быков с высокими значениями индексов короче продолжительность сервис-периода на 2226 дней в изучаемых стадах региона. Наследственный фактор бык-отец оказывает наибольшее влияние на продуктивные признаки в ЗАО ПЗ Рабитицы (31,0 и 33,7 по выходу молочного жира и белка, соответственно), тогда как в СПК ПЗ Детскосельский этот показатель равен 13,7 и 12,7, соответственно. Значительно выше (225,6) влияние быка-отца на продуктивное долголетие в ЗАО ПЗ Рабитицы по сравнению с быками СПК ПЗ Детскосельский (28,7). Сила влияния фактора бык-отец на признаки плодовитости в СПК ПЗ Детскосельский равна 7,5 против 5,1 в ЗАО ПЗ Рабитицы .Для уменьшения негативной тенденции снижения плодовитости коров необходимо в оценку производителей отечественной селекции включить показатель оплодотворяемости телок-дочерей быков и индексы плодовитости коров для прогноза оценки племенной ценности производителей, входящих в отечественную референтную базу данных использовать сперму импортных быков, имеющих положительную оценку по продуктивным и репродуктивным индексам.The potential of using the evaluation of imported sires by the fertility indices of daughters (HCR, DPR, CCR and FI) is considered. It was demonstrated that in progeny of imported bulls with positive values of HCR and DPR indices in Leningrad Region pedigree farms, there is a good conception rate in heifers after the first insemination (74.374.7). In daughters of bulls with a negative value of HCR (from -0.1 to -2.7) and DPR (from -0.1 to -3.4), the conception rate in heifers is lower (70.1). All average indices (HCR, DPR, CCR and FI) had negative value. In groups of bull fathers with a negative value of the HCR (-0.1 ... -2.7) and DPR (-0.1 ... -3.4) indices, the highest rate of fathers breeding value for milk yield was 660 kg and 610 kg milk, respectively, due to the negative relationship between productivity and fertility traits. To evaluate the daughters of domestic origin bulls, fertility indices according to C. Wilcox, CRA and Dohi were applied. It was revealed that bull daughters with high indices have shorter days open by 2226 days in the regional herds under study. The hereditary factor bull-father has the greatest impact on productive traits in JSC PF Rabititsy (31.0 and 33.7 in the yield of milk fat and protein, respectively), whereas in the APC PF Detskoselsky these indicators were 13.7 and 12.7, respectively. Significantly higher (225.6) was impact of the bull-father on productive longevity in JSC PF Rabitisy in comparison with the bulls of APC PF Detskoselsky (28.7). The strength of the impact of the bull-father factor on fertility traits in APC PF Detskoselsky was 7.5 versus 5.1 in JSC PF Rabititsy . To reduce the negative trend of decreasing cow fertility, it is necessary to include in the evaluation of domestic breeding sires the fertility rate of their daughter as well as cow fertility indices for predicting of sire breeding value which is included in the national reference database use sperm of imported bulls with a positive evaluation by productive and reproductive indices.

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