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1940 - 195921980 - 19911

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    Studies of the coat of the Romney lamb : practical and theoretical aspects of hair morphology, with special reference to the evolution of the fleece : thesis submitted by "Bourn" [for the degree of Master of Agricultural Science]
    (Massey University, 1940) Goot, Henry
    The original purpose of the present thesis was to answer this question: "To what extent is a britch of high halo-hair abundance an indicator of the non-kemp hairiness of the fleece?" It was assumed by Dr Dry in the light of earlier observations, that, on a britch with very many halo-hairs, the large Curly Tip fibres would be very hairy, and this has proved to be so. Especially did we want to learn about the degree of hairiness on the part of the fleece near to the britch. The gradient over the body from the britch was also much in mind, all the more because the boundary between the area on the britch with very many halo hairs and the neighbouring region with far fewer halo hairs is often abrupt. The aim of the work was that just defined, but the analysis of the samples examined provided information on a number of other matters, several of which may be thought more interesting than the problem proposed at the outset. These various results are reported in this thesis.
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    Space and time relations in the coat of the New Zealand Romney lamb
    (Massey University, 1943) Galpin, Nancy M
    In a recent paper Dry (4) gives an account of the fibre type arrays - the result of an action of two forces - the prenatal check and the reducing of inherent coarseness acting on an undefined substratum which occur on the back (4) of the New Zealand Romney Lamb. Preliminary observations by Dr. Dry and myself suggested that orderly relations existed between the fibre type arrays on the back and britch positions. These observations were extended and a comparative study of the fibre type arrays occurring over the dorsal and dorso-lateral portions of the coat of the Romney Lamb has been made. Their distribution, as one was prepared to find, has proved orderly. Following naturally on this investigation came a study of the proportions of precurly-tip to curly-tip and histerotrich fibres.
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    A study of the phenotypic expression of the lustre gene in sheep and a chromosomal analysis of this abnormality: a thesis presented in partial fulfilment of the requirements for the degree of Master of Science in Genetics at Massey University
    (Massey University, 1991) Campbell, Karen
    Blood and skin samples were taken from sheep with both the lustre and normal phenotype for the study of chromosomal banding patterns, follicle density, and cell type distribution. The chromosomal analysis showed no significant difference in the banding pattern, when a comparison was made between normal and Lustre animals. There were however, significant differences in the follicle density analysis. All parameters measured (primary follicle density, secondary follicle density, S/P ration, and total follicle density) showed statistically significant differences between normal and lustre animals (P<0.1). There was also a significant difference in the distribution of the paracortical and orthocortical cells when comparing normal sheep to lustre. In addition to this, there was a significant difference found in proportion of the different types of cells, and the fibre area (P<0.01).