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Inbreeding Depression on Female Fertility and Calving Ease in Spanish Dairy Cattle
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ABSTRACT
Inbreeding depression on female fertility and calving ease in Spanish dairy cattle was studied by the traditional inbreeding coefficient (F) and an alternative measurement indicating the inbreeding rate (ΔF) for each animal. Data included records from 49,497 and 62,134 cows for fertility and calving ease, respectively. Both inbreeding measurements were included separately in the routine genetic evaluation models for number of insemination to conception (sequential threshold animal model) and calving ease (sire-maternal grandsire threshold model). The F was included in the model ...
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Udder Health Shows Inbreeding Depression in Danish Holsteins
; ...study was to estimate inbreeding depression for udder health using...estimating the total cost of inbreeding depression to determine an acceptable...inbreeding. Key words: inbreeding depression, udder health, mastitis...
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Inbreeding depression and maternal effects in Aquilegia caerulea, a partially selfing plant.
; INTRODUCTION Inbreeding depression, defined as the lower...models predicted that inbreeding depression must be strong to affect...that quantification of inbreeding depression is necessary to predict...
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Inbreeding Depression and Male Survivorship in Drosophila: Implications for Senescence Theory
; ABSTRACT The extent to which inbreeding depression affects longevity and patterns...quantitative traits. However, few previous inbreeding depression studies have considered longevity...average, significant levels of inbreeding depression were observed for median life span...
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Linear and Curvilinear Effects of Inbreeding on Production Traits for Walloon Holstein Cows
; ...differences were small. Key words: inbreeding depression, curvilinear regression, confidence...This phenomenon is better known as inbreeding depression. The loss of the mean value for...mechanism for the genetic basis of inbreeding depression. Two major hypotheses have been...
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A Threefold Genetic Allee Effect: Population Size Affects Cross-Compatibility, Inbreeding Depression and Drift Load in the Self-Incompatible Ranunculus reptans
; ...average more inbred, so inbreeding depression in clonal fitness was...drift load affecting female fertility within small populations...from suffering from inbreeding depression and drift load and...the main causes of inbreeding depression, the fitness ...
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Effect of Incomplete Pedigrees on Estimates of Inbreeding and Inbreeding Depression for Days to First Service and Summit Milk Yield in Holsteins and Jerseys
; ...for missing ancestors. Estimated inbreeding depression was from an animal model that simultaneously...over 89% complete, respectively. Inbreeding depression in days to first service and summit...was estimated from both methods. Inbreeding depression for days to first service was ...
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Nonparametric Analysis of the Impact of Inbreeding on Production in Jersey Cows
; ...nonlinear patterns in the form of inbreeding depression. The form of the relationship between...unaffected for F ≤7%, and inbreeding depression seemed to stabilize at F >20...typically decline, and this is termed inbreeding depression (Falconer and Mackay, 1996; Lynch...
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Molecular Analysis, Cytogenetics and Fertility of Introgression Lines From Transgenic Wheat to Aegilops cylindrica Host
; ...backcrosses were selfed using pollen bags. Female fertility of F^sub 1^ ranged from 0.03 to 0...male sterility and extremely reduced female fertility, determined as the percentage of florets...aestivum Ae. cylindrica F^sub 1^ hybrids, female fertility was 2.2% when backcrossed with ...
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Costs and benefits of self-fertility in Asclepias exaltata (Apocynaceae)1
; ...selfed progeny suffer greatly from inbreeding depression. Because selfing is rare and the...self-sterility. Despite the costs of inbreeding depression, self-fertility has evolved repeatedly...Mitton 1993). The magnitude of inbreeding depression is positively correlated with ...
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 "The Daily Mail (London, England)")
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The female fertility clock starts ticking at 27, say doctors.
; Byline: BEEZY MARSH FEMALE fertility declines much earlier than...Experts have said up to now that female fertility begins to drop in the mid-30s...the first to indicate that female fertility declines before the age of...
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