GENOTYPIC ASSESSMENT OF KARAKUL RAMS BY FUR SKIN QUALITIES OF PROGENY

Published in Scientific Papers. Series D. Animal Science, Vol. LVII
Written by Ion BUZU

The research purpose was the comparative appreciation of different evaluation systems for fur skin characters and features at Karakul lambs and methods of rams testing by the progeny fur skin qualities, by emphasizing of those advantages and disadvantages. Research has been done on breeding sheep from experimental farm of INZMV Maximovca, Anenii Noi district, and CAP „Agrosargal” from Hâncești district. As a result of research has been found, that, the category of rams amelioration obtained as a result of the application of the terminological system of fur skin characters and features assessment at lambs appreciation and of simple testing method by the progeny fur skin, will not be afterwards confirmed, in proportion of 85%, when the decimal system of scoring is applied in order to appreciate the characters and features of lamb fur skins and will be used the biometric method of scoring, by testing the rams after the progeny fur skin qualities. Moreover, some rams that were qualified as reducing (worsen), as a result of testing after the progeny fur skin qualities by the simple method, have become ameliorator breeders, as a result of their testing after the biometric scoring system of progeny fur skin qualities and, reverse, other rams, which were qualified as enhancers in testing result by simple method, became reducers, as a result of their testing by biometric scoring method. It was concluded, that only application of terminological system assessment of Karakul lambs and of the simple method of rams testing after the progeny fur skin qualities are not enough for an objective evaluation of breeders amelioration category. The conclusions made as a the result of testing with simple method application are offen unreliable and contradictory, The use of decimal scoring system at Karakul lambs assessment and of biometric scoring method at testing rams after the progeny fur skin qualities, permits objective, genotypic evaluation of breeders amelioration category by determining the certainty criterion of the conclusions regarding amelioration degree of each ram apart. As a result of research was proposed a classification of Karakul rams by the amelioration value in following categories: I degree ameliorator – whose progeny exceeds by score ranking, the flock level with td ≥ 3.3 (B ≥ 0.999). II degree ameliorator - whose progeny exceeds by score ranking, the flock level with td ≥ 2.6 – 3.2 (B ≥ 0.99). Ordinary ameliorator - whose progeny exceeds by score ranking, the flock level with td ≥ 2.0 – 2.5 (B ≥ 0.95). Relative ameliorator - whose progeny exceeds by score ranking, the flock level with td ≥ 1.6 – 1.9 (B ≥ 0,90). Neutral – whose progeny doesn’t have a certain positive difference comparing to flock level. Certain reducer – whose progeny surrenders by score ranking, the flock level with td ≥ 1.6. Relative reducer - whose progeny surrenders by score ranking, the flock level up to td <.1.6.

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Buzu I. 2014, GENOTYPIC ASSESSMENT OF KARAKUL RAMS BY FUR SKIN QUALITIES OF PROGENY. Scientific Papers. Series D. Animal Science, Vol. LVII, ISSN 2285-5751, 15-24.


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