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inbreeding
inbreeding
inbreeding Mating of two closely blood-related organisms. It is the opposite of outbreeding and over successive generations causes much less variation in
genotype (genetic makeup) and
phenotype (physical characteristics) than is normal in a wild population. A form of
genetic engineering, it can be used to improve breeds in domestic plants and animals. In humans, it can have harmful results, such as the persistence of
haemophilia in some European royal families.
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Inbreeding Avoidance in an Isolated Indigenous Zapotec Community in the Valley of Oaxaca, Southern Mexico
Magazine article from: Human Biology; 6/1/2005; ; 700+ words
; Abstract We analyzed inbreeding using surname isonymy in an indigenous...matronym naming. Estimation of inbreeding from surname isonymy is facilitated...methods were used to estimate total inbreeding and to segregate it into random and...
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Inbreeding Trends and Application of Optimized Selection in the UK Holstein Population
Magazine article from: Journal of Dairy Science; 10/1/2004; ; 700+ words
; ...Important increases in the rates of inbreeding have recently been observed in dairy...estimate the current level and rates of inbreeding in the UK Holstein population and to...optimized selection to manage the rates of inbreeding. Inbreeding coefficients were calculated...
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INBREEDING EFFECTS ON RESISTANCE AND TRANSMISSION-RELATED TRAITS IN THE SILENE-MICROBOTRYUM PATHOSYSTEM.
Magazine article from: Ecology; 2/1/2000; ; 700+ words
; N. J. OUBORG [1] Abstract. Inbreeding in local host populations will be a...dynamics we investigated the impact of inbreeding in the host plant Silene alba on its...mating resulted in 65 inbred lines, with inbreeding coefficients of f = 0, 0.25, 0...
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Inbreeding Effects on Milk Production, Calving Performance, Fertility, and Conformation in Irish Holstein-Friesians
Magazine article from: Journal of Dairy Science; 9/1/2007; ; 700+ words
; ...study was to determine the effect of inbreeding on milk production, somatic cell count...Friesian pluriparous dairy cows. Inbreeding was included in a linear mixed model...the model as an indicator of nonlinear inbreeding depression. The effects of dam inbreeding...
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Inbreeding Depression on Female Fertility and Calving Ease in Spanish Dairy Cattle
Magazine article from: Journal of Dairy Science; 12/1/2007; ; 700+ words
; ABSTRACT Inbreeding depression on female fertility and calving...dairy cattle was studied by the traditional inbreeding coefficient (F) and an alternative measurement indicating the inbreeding rate (ΔF) for each animal. Data...
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Inbreeding Depression and Male Survivorship in Drosophila: Implications for Senescence Theory
Magazine article from: Genetics; 1/1/2006; ; 700+ words
; ABSTRACT The extent to which inbreeding depression affects longevity and...traits. However, few previous inbreeding depression studies have considered...average, significant levels of inbreeding depression were observed for median...
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Inbreeding in captive bred Przewalski horses from local populations
Magazine article from: Folia Zoologica; 7/1/2008; ; 700+ words
; ...objectives of the study were to estimate the inbreeding level in the population of captive bred...Studbooks were considered. The average inbreeding coefficient was equal to 9.4%. In general, the inbreeding level decreased over the analyzed period...
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Maternal and Fetal Inbreeding Depression for 70-Day Nonreturn and Calving Rate in Holsteins and Jerseys
Magazine article from: Journal of Dairy Science; 9/1/2003; ; 700+ words
; ABSTRACT Inbreeding depression for 70-d nonreturn rate was estimated...very low for both breeds (1 to 2%). Maternal inbreeding depression was small (3% reduction for 10% inbreeding) and significant only for Jerseys. Fetal and...
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Controlling inbreeding by constraining the average relationship between parents of young bulls entering AI progeny test programs
Magazine article from: Journal of Dairy Science; 9/1/2002; ; 700+ words
; ABSTRACT Inbreeding is known to impair the health, fertility...species. Mating programs can address inbreeding concerns on the farm, at least in the short term, but long-term control of inbreeding in a dairy population requires consideration...
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Expected Inbreeding with Recurrent Selection in Maize: I. Mass Selection and Modified Ear-To-Row Selection.
Magazine article from: Crop Science; 11/1/1998; ; 700+ words
; ...individuals to form an improved population. Inbreeding occurs in each selection cycle because...selected and recombined. The effects of inbreeding increase with continued selection. Inbreeding can bereduced by increasing the number...
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Inbreeding
Book article from: Genetics
Inbreeding Inbreeding is defined as mating between related individuals. It is also called...some plants successfully self-fertilize (the most extreme case of inbreeding), biological mechanisms are in place in many organisms, from fungi...
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inbreeding
Book article from: The Columbia Encyclopedia, Sixth Edition
inbreeding mating of closely related organisms. Inbreeding is chiefly used as a means of insuring the preservation...offspring of purebred animals (see breeding ). Continued inbreeding through many generations reduces the chances for diversity...
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inbreeding depression
Book article from: A Dictionary of Zoology
inbreeding depression The decreased vigour in terms of growth, survival, or fecundity, that follows one or more generations of inbreeding . This is the opposite outcome to that obtained by the crossing of two separate inbred lines. Compare HETEROSIS .
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Wright's inbreeding coefficient
Book article from: A Dictionary of Zoology
Wright's inbreeding coefficient See COEFFICIENT OF INBREEDING .
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coefficient of inbreeding
Book article from: A Dictionary of Plant Sciences
coefficient of inbreeding The probability that two allelic genes forming a zygote are both...homozygous in an offspring. The term is sometimes known as Wright's inbreeding coefficient ( F ), after the geneticist Sewall Wright who formulated...
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