نتایج جستجو برای: inbreeding coefficient

تعداد نتایج: 174104  

S. Savar-Sofla S. Varkoohi, Z. Patiabadi

The aim of this study was to estimate amount of inbreeding coefficient in Shal sheep and its impact on growth performance. Pedigree information and body weight at different ages (birth weight, 3 month weight, 6 month weight, 9 month weight and 12 month weight) were used from 6692 lambs from 90 rams and 1007 ewes. Data were collected on Ghazvin sheep breeding station during 1997-2013. Estimation...

Journal: :genetics in the 3rd millennium 0
محمد حسن کریمی نژاد

0

اسرافیلی تازه کند محمدیه, مریم, بهمرام, رضا, هدایت ایوریق, نعمت,

This research was done to estimate of inbreeding coefficient and its effect on some of productive and reproductive traits in Moghan agro-industrial company Holstein cows with using of 17966 Holstein cows pedigree data from 2007 to 2016. For preparing and editing of data, estimate of inbreeding coefficient and traits regression content from inbreeding Fox pro, Excel, CFC and Wombat softwares wer...

Journal: :علوم دامی ایران 0
رضا توحیدی رسول واعظ ترشیزی محمد مرادی شهر بابک محمدباقر صیاد نژاد

a pedigree file of 382831 holstein cows and bulls, collected from herds registered by animal breeding center of iran during 1967 to 1999, was used to calculate the inbreeding coefficient. the mean inbreeding coefficient for the whole population (male and female), on a base year of 1946, was 0.184%. the means for cows (94 percent of the whole population) and bulls (6 percent of the whole populat...

Journal: :پژوهش های علوم دامی ایران 0
محمد الماسی امیر رشیدی محمد رزم کبیر محمد مهدی غلام بابائیان

introduction the mating of related individuals produces an inbred offspring and leads to an increased homozygosity in the progeny, genetic variance decrease within families and increase between families. the ration of homozygosity for individuals was calculated by inbreeding coefficient. inbred individuals may carry two alleles at a locus that are replicated from one gene in the previous genera...

بیگی نصیری, محمدتقی, راشدی ده‌صحرائی, آذر, فیاضی, جمال, وطن‌خواه, محمود,

The aim of this study was to estimate inbreeding coefficient and its impact on wool performance in Lori-Bakhtiari sheep. In this research, wool weight records of 6234 lambs born from 273 rams and 1924 ewes were used. The data were collected at Shahrekord Sholi station during 1990-2010. In total pedigree, 1764 animals were inbred. Averages of inbreeding coefficient for total and inbred populatio...

Journal: :Conservation biology : the journal of the Society for Conservation Biology 2012
María José Ruiz-López Natalia Gañan José Antonio Godoy Ana Del Olmo Julian Garde Gerardo Espeso Astrid Vargas Fernando Martinez Eduardo R S Roldán Montserrat Gomendio

The relation among inbreeding, heterozygosity, and fitness has been studied primarily among outbred populations, and little is known about these phenomena in endangered populations. Most researchers conclude that the relation between coefficient of inbreeding estimated from pedigrees and fitness traits (inbreeding-fitness correlations) better reflects inbreeding depression than the relation bet...

2014
A. I. Sayed Manal Elsayed

Simulated Populations with one record were generated with assumed mean (0) and variance (1) milking Buffalo populations. Four different population sizes (z): 10,000, 25,000, 50,000 and 100,000 animals were generated. Populations were composed by four generations obtained by selection of sires and dams from the previous generation. Mating ratio (male: females) was designed to differ from 1:25 to...

Journal: :Journal of dairy science 1984
G F Hudson L D Van Vleck

Inbreeding coefficients of 30,794 registered Ayrshire cows were calculated from relationships between sire and maternal male ancestors. Average inbreeding coefficient of all cows was less than 1% and of the 5,202 inbred cows was 5.4%. Fewer than 2% of inbred cows had coefficients greater than 15%. Percent of inbred cows increased from 23% of cows born in 1972 to 43% in 1980. Over the same perio...

Journal: :پژوهش های علوم دامی ایران 0
زهرا یگانه پور هدایت الله روشنفکر جمال فیاضی میر حسن بیرانوند محمد قادرزاده

inroduction: inbreeding is defined as the probability that two alleles at any locus are identical by descent and occur when related individuals are mated to each other. the initial consequence of inbreeding is inbreeding depression reducing the performance of growth, production, health, fertility, and survival traits. this concern has become more serious in animal breeding nowadays, in which se...

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