A diallel cross analysis of genetic determinants of copulatory behavior in rats.

Dewsbury, Donald A.

doi:10.1037/h0076389

Cited by 25 publications

(6 citation statements)

References 33 publications

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“…None of the crossbred boars had more than one failure to mate while 15 (42%) purebred boars had two or more failures. Dewsbury (1975) reported that the proportion of inbred parental male rats that failed to mate in a series of four consecutive mating tests was much greater than the proportion of the F1 males that failed the test.…”

Section: Testicular and Epididymidal Characteristicsmentioning

confidence: 99%

Reproductive and Testicular Characteristics of Purebred and Crossbred Boars2

Wilson

Johnson

Wettermann

1977

Journal of Animal Science

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SUMMARYOne-hundred-ninety-five Duroc (D), Hampshire (H), Duroc X Hampshire (DXH) and Hampshire X Duroc (HX D) boars were evaluated for reproductive performance. One-hundred-sixteen boars were castrated at approximately 225 days of age to evaluate testicular and epididymidal weights and sperm numbers. Testes from crossbred boars were 95.33 + 22.81 g heavier (P<.01) and contained 14.4I + 3.92 billion more sperm (P<.01) than those from purebred boars. Testes from Hampshire boars were 50.40 + 31.75 g heavier with 6.27 + 5.45 billion more sperm than those from Durocs. There were no significant differences between breeds for caput-corpus epididymidal measurements. Durocs had 24.55 + 12.16 billion more sperm (P<.05) in the cauda epididymis than Hampshire boars. Testes weight and testes sperm numbers were significantly correlated with caput-corpus epididymidal and cauda epididymidal sperm numbers. Correlations of testicular and epididymidal characteristics with growth rate and backfat to 100 kg were small and nonsignificant.Twenty 7.5-month to 9-month-old D, Dx H and HXD boars and 19 H boars were each mated to two Yorkshire gilts to evaluate reproductive efficiency. Conception rates were: D, 63.2%; DXH, 67.5%; HXD, 60.0%; and H, 48.6%. Number of embryos 30-days postbreeding was 10.66 + .49 and 11.25 -+ .43 (P>.10) for gilts mated to purebred and crossbred sires, respectively. Twenty-eight of 36

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Section: Testicular and Epididymidal Characteristicsmentioning

confidence: 99%

Reproductive and Testicular Characteristics of Purebred and Crossbred Boars2

Wilson

Johnson

Wettermann

1977

Journal of Animal Science

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“…Animal husbandry studies usually demonstrate low heritabilities for such measures as fertility and high heritabilities for characters less obviously related to fitness in a natural environment (Fal-coner, 1960;Lerner, 1958). The general pattern of results of behavior genetic research using rodents has indicated high degrees of directional dominance and low heritabilities in sexual behaviors, moderate dominance on most learning measures, and low dominance with high heritability on general activity measures (Dewsbury, 1975;Halcomb, Hegmann, & DeFries, 1975;Wahlsten, 1972).…”

mentioning

confidence: 99%

Genetic dominance for low activity in infant mice.

Henderson¹

1978

Journal of Comparative and Physiological Psychology

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Locomotor activity of 2,140 four-day-old inbred, hybrid, and wild mice was measured. Consonant with the prediction that high rates of locomotor activity would be maladaptive in infant mice, hybrids were less active than inbred lines. A triple test cross analysis indicated low heritability and nearly complete dominance toward low activity. Mice from wild stock were even less active than hybrids, which suggests that selection pressures for low infantile activity have relaxed during laboratory domestication. A test is described for estimating changes in selection pressures resulting from laboratory rearing.

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“…With regard to the ultrasonic vocalizations occurring during copulatory sequences the work of Barfield and Geyer (1972;1975) on laboratory rats is most important. They have found that male laboratory rats have regular patterns of ultrasonic vocalization that follow most ejaculations.…”

Section: The Description Of Copula Tory Behaviormentioning

confidence: 99%

Copulatory behavior of Rattus rattus / by Daniel Quen Estep.

Estep¹

1975

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A diallel cross analysis of genetic determinants of copulatory behavior in rats.

Cited by 25 publications

References 33 publications

Reproductive and Testicular Characteristics of Purebred and Crossbred Boars2

Reproductive and Testicular Characteristics of Purebred and Crossbred Boars2

Genetic dominance for low activity in infant mice.

Copulatory behavior of Rattus rattus / by Daniel Quen Estep.

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