-Globulin Type, Fertility and Embryonic Mortality in Cattle

Ashton, G. C.; Fallon, G. R.

doi:10.1530/jrf.0.0030093

Cited by 42 publications

(13 citation statements)

References 7 publications

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“…There have been many attempts to find mechanisms for the maintenance of this polymorphism. Ashton and his associates (3,4) have reported evidence in some cattle for excess of heterozygotes, and postulated superior heterozygote fitness. This is not confirmed in other groups of cattle (5,6), although lowered milk production of one homozygous class has been reported (6).…”

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confidence: 99%

The Maintenance of Transferrin Polymorphism in Pigeons

Frelinger

1972

Proc. Natl. Acad. Sci. U.S.A.

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Transferrin, a nonheme iron-binding protein, is polymorphic in most vertebrate species that have been examined. In pigeons, it is controlled by an autosomal gene, with two known codominant alleles, Tf(A) and Tf(B). The two alleles are found in nearly equal frequencies and the three genotypes are at Hardy-Weinberg equilibrium in all populations studied. This report shows that ovotransferrins from heterozygous females inhibit microbial growth, by use of yeast as an assay organism, better than ovotransferrins from either of the homozygous types, or those from a mixture of homozygous types. Heterozygous females hatch a larger percentage of their eggs than homozygous females. This difference is probably accounted for by the transferrin effect. The failure of the mixture of the homozygous types to act like the heterozygous type calls into question the currently accepted structure of transferrin as a monomeric protein. The greater fecundity of heterozygous females can account for the maintenance of transferrin polymorphism in pigeons.

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The Maintenance of Transferrin Polymorphism in Pigeons

Frelinger

1972

Proc. Natl. Acad. Sci. U.S.A.

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“…No differences in reproduction performance among the different genotypes were observed. Although it had been reported that transferrin polymorphisms affect fertility in dairy and beef cattle (ASHTON & FALLON, 1962), these [AFC= 0.14±0.18, CI=0.10± 0.18 (KOOTS et al, 1994)]. However, due to their high coefficient of variation it is possible to have good annual rates of response to selection, even with low heritabilities (BRADFORD, 1985).…”

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confidence: 99%

Genetic characterization of a brangus-ibage cattle population: biochemical polymorphisms and reproductive efficiency

et al. 2000

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Biochemical techniques were used to investigate the genetic variability in a Brangus-Ibage population by determining allele frequencies of 18 blood protein systems: Hemogloin beta-Chain (Hb), Albumin (Alb), Amylase (Am), Transferrin (Tf), Carbonic Anhydrase (CA), Ceruloplasmin (Cp), Malic Enzyme (ME), Diaphorase I and II (Dia I and Dia II), Slow Alpha 2 Macroglobulin (Ap), Acid Phosphatase (ACP), Esterase B and D (EstB and EstD), Phosphogluconate Dehydrogenase (PGD), Glucose-6-Phosphate Dehydrogenase (G-6-PD), Glucose-Phosphate-Isomerase (GPI), Superoxide Dismutase (SOD) and Glyoxalase I (GLO). The percentage of polymorphic loci were estimated at 0.27, the mean number of alleles was 1.33 and the mean heterozygosity was 0.07. There was a good agreement between expected and observed heterozygosity values. The population was in agreement with Hardy-Weinberg expectations in all systems. Reproductive records allowed to estimate three parameters of reproductive efficiency: mean age at first calving (1152.15 ± 166.60 days), mean calving interval (539.23 ± 124.10 days) and mean weight at first calving (391.02 ± 37.59kg). No relationship was found between reproductive efficiency and genetic systems.

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“…Recently, many instances of postzygotic selection have been discovered in domesticated species. The transferrin locus has been implicated with embryonic mortality in both cattle (Ashton and Fallon, 1962) and pigs (Kristjansson, 1964), while in poultry the B blood group genes have been reported to affect hatchability (Allen, 1962;Allen and Gilmour, 1962). In a recent report, Morton, Gilmour, McDermid and Ogden (1965) examined the influence of egg white polymorphic loci //, /// and Tf (transferrin) on embryonic mortality in the chicken and concluded that they affect mortality during the first 15 days of incubation.…”

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confidence: 99%

A search for an association between maternal egg white protein polymorphisms and embryonic mortality in the domestic fowl

Buvanendran

1967

British Poultry Science

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The possible association between the maternal genotype at two egg white loci and viability of their embryos was examined in two closed flocks of White Leghorn hens. One of the populations was polymorphic at the ovalbumin locus and locus II and the other at locus II only. Two generations of the first population comprising 536 hens and 9092 fertile eggs and one generation of the second comprising 83 hens and 1159 eggs were used in the study. Significant effects were observed with mortality at different stages of incubation but the results were not consistent for the two strains or for the 2 years studied.

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-Globulin Type, Fertility and Embryonic Mortality in Cattle

Abstract: It is concluded that the ß-globulin locus in cattle affects fertility in two ways, at fertilization, and in utero.

Cited by 42 publications

References 7 publications

The Maintenance of Transferrin Polymorphism in Pigeons

The Maintenance of Transferrin Polymorphism in Pigeons

Genetic characterization of a brangus-ibage cattle population: biochemical polymorphisms and reproductive efficiency

A search for an association between maternal egg white protein polymorphisms and embryonic mortality in the domestic fowl

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