Genetic Variations in the Progenies of the Diallel Crosses of Inbred Lines of Chicken

Yao, T. S.

doi:10.3382/ps.0401048

Cited by 18 publications

(9 citation statements)

References 21 publications

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“…Nonadditive effects, primarily dominance and maternal, normally result in the 4D estimate being considerably larger than the 4S estimate (Siegel, 1962;Yao, 1961). This pattern was, however, not observed in the current study.…”

Section: Resultscontrasting

confidence: 81%

Growth Rate Inheritance in Japanese Quail

Marks¹,

Lepore²

1968

Poultry Science

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Section: Resultscontrasting

confidence: 81%

Growth Rate Inheritance in Japanese Quail

Marks¹,

Lepore²

1968

Poultry Science

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“…An example of such a study is that by Cock and Morton (1963), who found evidence of additive sexlinked variation in the shank length:body weight ratio, while noting that maternal effects account for 3 to 6% of the total variation in body weight. Other examples include those of Yao (1961), who observed significant maternal variation for juvenile but not adult body weight, and Pym and Nicholls (1979), who reported that sex linkage was important in the weight gain of chickens.…”

Section: Introductionmentioning

confidence: 94%

Sex-Linked and Maternal Effects on Growth in Chickens

Barbato

Vasilatos‐Younken

1991

Poultry Science

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A study was designed to estimate the contribution of various types of genetic variation in growth of chickens using populations that widely differed in growth rate. Populations tested included a commercially developed sire line (CM), a fertility-selected, broiler-type line (FS), and the pureline Jersey Giant (JG). A full set of F1 crosses and purelines of both sexes was used to estimate the following genetic effects: heterosis due to the autosomes, heterosis due to the sex chromosomes, average line effects, maternal effects, and additive sex linkage. Average line effects were highly significant beyond hatching for both body weight and shank length, with rank-order CM greater than FS, which was greater than JG. Significant differences between the sexes within a line were observed for CM and JG line effects, confirming the existence of sex-linked factors. There was no average heterosis or sex-by-heterosis interaction for growth-related traits, but specific heterosis was frequently significant. Maternal effects were sporadic and generally of little importance beyond hatching. Additive sex linkage, however, was highly significant and influenced body weight beyond hatching. These data indicate that the primary advantages in increasing growth via cross-breeding in chickens comes from average line effects and additive sex linkage. Heterosis and maternal effects can influence performance, especially in specific crosses, but these effects appear to be sporadic and of less importance than sex linkage.

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“…The median heritability was .41 with an interquartile range of .29 to .54. Martin et al (1953), Brunson et al (1956), Goodman et al (1957Goodman et al ( , 1960 and Kan et al (1959) found that nonadditive effects were small while Yao (1959Yao ( , 1961 reported significant dominance effects in certain incrosses and incrossbreds. Although the overall range of the estimates given in Figure 1 may appear wide it should be remembered that several methods of estimations were employed and that the parameters were obtained for many different populations.…”

mentioning

confidence: 98%