Heterosis from Crosses among British Breeds of Beef Cattle: Post-Weaning Performance to Slaughter

Dw, Vogt; Ja, Gaines; Carter, RC; Wh, McClure; Cm, Kincaid

doi:10.2527/jas1967.263443x

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1974

1985

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1974

Intensive Beef Production

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1974

Intensive Beef Production

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Heterosis, Sex and Maternal Interactions in Crosses Among Inbred Lines of Mice

White¹,

Jamison²,

Vinson³

1975

Can. J. Genet. Cytol.

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All possible crosses and reciprocals were made among four inbred lines (F = 92%) developed from 12 generations of full-sib mating. All lines originated from a common outbred base population of ICR-albino mice. Data were obtained from 356 litter containing 2,734 mice to evaluate heterosis, reciprocal effects, sex effects and their interactions as they affect body weight and weight gain. Heterosis was significant for most of the postweaning traits (42- and 56-day weight and gain from 21 to 42 days). Nonadditive gene action may have included overdominance and epistasis since both reciprocal linecrosses were generally heavier than those of the better inbred lines. Although significant differences in reciprocals and inbred lines were not frequent, there were sufficient differences to indicate that lines varied in the fixation of loci during inbreeding. Sex-heterosis interactions were significant for 12 of 30 possible cases. However, eight of the 12 significant interactions occurred in crosses involving only one of the lines. The interactions were of the divergent type and arose from males exhibiting more heterosis than females. Overdominance in genes on the sex chromosomes modified by other loci (epistasis) was proposed as a possible explanation for these results. Some sex-linkage affecting growth was evident from the interaction of sex with reciprocal effects.

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Crossbreeding and Management Systems for Beef Production2

Deutscher

Slyter

1978

Journal of Animal Science

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Heterosis from Crosses among British Breeds of Beef Cattle: Post-Weaning Performance to Slaughter

Cited by 8 publications

References 0 publications

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Heterosis, Sex and Maternal Interactions in Crosses Among Inbred Lines of Mice

Crossbreeding and Management Systems for Beef Production2

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