Sydney Cross Harland
Articles written in Journal of Genetics
Volume 20 Issue 3 January 1929 pp 365-385
Volume 20 Issue 3 January 1929 pp 387-399
Volume 21 Issue 1 April 1929 pp 95-111
Pale cream of Upland or Sea Island White, and yellow of grades 1 to 7, form an allelomorphic pair of characters which may be represented by the factor pair
Segregation in inter-specific crosses is more complicated than in inter-Peruvian crosses, in that many intermediate grades of yellow are found in
Upland and Sea Island White are both genetically
The total number of modifiers is not known, nor has the attempt made to distinguish their specific effects been successful. Probably not less than 2 nor more than 7 modifiers are concerned.
The occurrence of grades lighter or darker than the parents in the
Some Uplands have intensifiers capable of raising Sea Island from grade 4 to grade 6, but there is no ease where Upland has intensified the colour of a Bourbon variety.
Volume 28 Issue 2 December 1933 pp 315-325
1. Further experiments are described on the mode of inheritance of the crinkled dwarf mutant of
2. Observations were made on the characters of crinkled when transferred by repeated back-crossing to
3. The new type of
5. Transference of crinkled to two further types of
6. The bearing of the experiments on Fisher’s theory of dominance is discussed and it is concluded that modification of the theory is necessary. Complete dominance of normal over crinkled exists in two types of
Volume 29 Issue 2 July 1934 pp 181-195
1. Further experiments are described on the mode of inheritance and distribution in six species of New World cottons of a pair of duplicate factors for chlorophyll deficiency.
2. Duplication of factors is considered to have taken place through polyploidy with subsequent mutation of one or other of the members constituting the pair in some of the species.
3. The experimental data support Haldane’s view that in polyploid species one member of a pair of duplicate genes may mutate without disadvantage, provided its functions can be performed by a gene in one of the other sets of chromosomes.
4. The taxonomic and evolutionary significance of the results is discussed and it is suggested that the extent to which the dimeric condition is converted to the monomeric in polyploid species may provide some indication of the age of the species. In an old series of allopolyploids such as the New World species of
Volume 31 Issue 1 June 1935 pp 21-26
1. The cross between
2. It is considered that
3. The conversion of the crinkled mutant to pseudo-normal by genic recombination resulting from the interaction of
4. A new method for the production of duplicate genes is suggested.
Volume 31 Issue 1 June 1935 pp 27-37
1. The inter-
2. Repeated back-crossing of heterozygotes to the brown parent had the effect of equalising the plus modifiers of both the dominant and recessive phases of the factor
3. A negative correlation was shown to exist between lint colour and lint length, the factor
4. Minor colour factors were also correlated with variations in lint length.
5. The blending type of inheritance of brown lint in Egyptian × Sea Island is considered to be due to the disintegration by human agency of an original brown-lint factor complex.
6. The cross of brown
Volume 34 Issue 1 February 1937 pp 153-168
1. The gene
2. The gene
3. It is believed that species may possess modifier complexes, the effect of which is to preserve the stability of genes and prevent them from mutating at an excessive rate.
4. The genes
5. Other cases of mutability in interspecific hybrids are mentioned, and the possible significance to the plant breeder of mutability consequent on interspecific hybridization is referred to.
Volume 42 Issue 1-2 April 1941 pp 1-19
The genetics of cotton - XVIII. Transference of genes from diploid north American wild cottons (
Volume 42 Issue 1-2 April 1941 pp 21-47
1. The dominance relations of the crinkled mutant of
2. It is believed that there have been two methods by which dominance at the crinkled locus in the six species of New World
3. Some conditions under which the Fisher effect is operative are discussed.
4. Evidence is brought forward indicating that the normal allele of
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