"Nicking" in Relation to Sexual Maturity of S. C. W. Leghorns
- 1 March 1945
- journal article
- research article
- Published by University of Chicago Press in The American Naturalist
- Vol. 79 (781) , 152-159
- https://doi.org/10.1086/281248
Abstract
Chicken breeders refer to "nicking" as the production of supposedly better progeny than could be predicted from the estimated genotypes (estimates based on phenotype). A series of 31 diallel matings (2 dams at different times to each of 2 [male][male]) gave data on sexual maturity in which "nicking," if present, could be tested for by an analysis of variance. The results showed that "nicking" does not play an important part in determining sexual maturity. Thus, once a hen''s breeding potentiality has been established, she should contribute to the progeny about equally as well with any [male]. For this character, there seems to be no evidence that differing genotypes may possess the same phenotype but differ in combining power as is the case in corn. The individual heredifabilify of sexual maturity is within the limits of 16-33%.This publication has 1 reference indexed in Scilit:
- An Expansion of Jones's Theory for the Explanation of HeterosisThe American Naturalist, 1944