Letter | Published:

Kemp in New Zealand Romney Sheep and its Significance for Mountain Breeds

Nature volume 154, pages 612613 (11 November 1944) | Download Citation

Subjects

Abstract

SELECTION against kemp in the Romney is a simple matter, scarcely amounting to a breeder's problem, but facts learnt from Romneys may be offered to breeders of mountain sheep that characteristically have hairy birthcoats. In Romney sheep, selection against high abundance of halo-hairs is a sufficient safeguard against kemp, and selection against halo-hairs is effective. On the backs of lambs with abundant halo-hairs (large birthcoat kemps of generation I, G1), there may or may not be secondary kemp. Birth-coat kemps are shed around the third month after birth. Halo-hairs are nearly always all shed. Occasionally an odd halo-hair is of indeterminate growth. Super-sickle-fibres, whether in non-plateau or plateau arrays, sickle-fibres which are the key type in non-plateau arrays, and hairy-tip-curly-tip fibres which are the key type in plateau, vary in their shedding from all to none. The shed birthcoat fibres are succeeded by other fibres which when they are shed are later, or secondary, kemps. In non-plateau, later kemp is grown mostly in the follicles of the halo-hairs, occasionally, as we conclude, in some super-sickle-fibre follicles, scarcely ever in those of sickle-fibres. In plateau, super-sickle-fibres and hairy-tip-curly-tip fibres, as well as the very abundant halo-hairs, are readily followed by kemps, so that there is often a huge amount of secondary kemp in N-type lambs.

Access optionsAccess options

Rent or Buy article

Get time limited or full article access on ReadCube.

from$8.99

All prices are NET prices.

References

  1. 1.

    , Emp. J. Exp. Agric., 4 (1936).

  2. 2.

    , J. Text. Inst., 24 (1933) and 26 (1935).

  3. 3.

    , N.Z. J. Agric., 46 (1933) and 48 (1934).

  4. 4.

    , N.Z. J. Sci. Tech., 22 (1940).

  5. 5.

    , and , Nature, 145, 390 (1940).

  6. 6.

    and , Nature, 148, 563 (1941).

Download references

Author information

Affiliations

  1. Massey Agricultural College, Palmerston North, New Zealand. June 5.

    • F. W. DRY
    •  & JANET M. ROSS

Authors

  1. Search for F. W. DRY in:

  2. Search for JANET M. ROSS in:

About this article

Publication history

Published

DOI

https://doi.org/10.1038/154612a0

Comments

By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.