J. M. Rendel
Articles written in Journal of Genetics
Volume 40 Issue 3 August 1940 pp 439-440
Volume 46 Issue 2-3 January 1945 pp 287-302
Volume 49 Issue 1 May 1948 pp 38-41
Scarlet and cherry implants are autonomous in wild-type hosts and are not homologous with cinnabar.
Poppy implants are autonomous in wild-type hosts, but poppy maroon implants are pinker in wild-type hosts. Poppy may behave like bright in
Wild type is autonomous in maroon. Maroon is therefore not homologous with claret.
Volume 50 Issue 1 June 1950 pp 1-8
Methods of estimating the rate of genetic gain achieved in animal improvement are discussed and criticized.
A theoretical method of estimation of the maximum possible genetic gain of milk yield under direct selection is presented for a closed herd of dairy cattle. The maximum possible gain is approximately 1% of the average yield.
The method can also be used for the estimation of genetic gain from the selection practised in an actual, herd. An estimated gain of milk yield of 0.7% per year is given for one herd.
Volume 50 Issue 1 June 1950 pp 21-31
The problem of the use of progeny testing in conjunction with artificial insemination in dairy-cattle breeding has been considered from the viewpoint of statistical genetics.
The maximum rate of genetic improvement in a unit of 2000 cows is of the order of 1·5% of the average yield per annum, i.e. under present conditions at about 10 gal. per year. Efficient use of progeny testing must include the breeding of young bulls from the selected progeny-tested sires. Each sire progeny tested for milk yield would also have been tested for deleterious recessives by mating to twenty of his daughters. The optimum structure depends little on the assumed heritability of milk yield. The rate of advance increases with the size of the unit.
The general problem of the effective use of progeny testing in dairy-cattle breeding is discussed.
Volume 51 Issue 1 July 1952 pp 89-94
The incidence of white heifer disease in a herd of Shorthorns is described. The disease is far commoner in white animals and somewhat commoner in roan than in red. White animals that were daughters of white seem to be more susceptible than white that are the daughters of roan. From the comparison of the frequency of the gene
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