RESISTANCE PARTICULARITIES AND CURLING OF THE CURLS AT THE MOLDAVIAN KARAKUL LAMBS

I. Buzu

Abstract
    The purpose of this scientific paper was to focus on the peculiarities of resistance and rolling of curls at the Moldavian Karakul lambs, and to reveal the relations of these attributes with other qualities and characteristics of the skin for the improvement of the lamb selection procedures of the requested type. The scientific researches were carried out on the lots of Moldavian Karakul lambs from the ewe flock of Experimental House „Tevit” of the National Institute of Animal Husbandry and Veterinary Medicine (INZMV) from Maximovca village, Anenii Noi district and Agricultural Production Cooperative (APC) "Agrosargal" from the Sarata Galbena village, Hânceşti district. The nonparametric properties of the curl have been researched according to the methods elaborated or perfected by us, in accordance with the Karakul ewe Guidelines for Breeding with the amelioration principles in the Republic of Moldova. It was found that with the increase of the length of the curls from the short to the very long category, increases the share of lambs with excellent resistance from 3.9% to 100% or by 96.1% (td = 36.7; P < 0.001) and, at the same time, lowers the low lame weight with low and insufficient curls strengths from 85.7% to 0.0% (td = 6.0; P <0.001). With the increase in the degree of silkiness of the sheathing of lambs from reduced to excellent, the overall weight of individuals with the excellent and suitable curls strength is significantly increased from 46.3% to 91.7% or by 45.4% (td = 9.2; P < 0.001). For lambs with jacket curl type, the mixed (59.5%) and cranial (32.5%) of curls rolling direction is characteristic. For the lambs with the flat and coastal curl type it is characteristic the caudal direction of curls rolling (92.4 and 95.0% of the cases). Lambs with the type of kaukasian curl have, for their part, an indeterminable direction (60.8%) of curls rolling. It is considered that the lower degree of laughter in lamb is more advantageous because it offers the possibility of retaining the lamb for a few days (4-5 days) before slaughter until the degree of ablation reaches 10-11 points. During this time, the surface of the skin and the body mass of the lamb will increase, which leads to the obtaining of the economic benefits. The most desired degree of rolling at birth is considered to be 5-7, while grade 10-11 already indicates the need to slaughter the lamb. Finding that the degree of the curls rolling increases daily by 0.3 points and the lamb can be retained until reaching 10.5 points, we have determined that lambs with jacket curl can be detained up to at slaughter for 1-2 days, those with the type of coastal curl 4-5 days, those with the type of flat curl 6-7 days, and those with the kaukasian curl require urgent slaughter. As a result of the research, the following conclusions were deduced: the strength and elasticity of the curls at the Moldavian Karakul lambs is in a phenotypical correlation positive and evident with the length of the curls, the fibres density and the density of the skin, and, at the same time, negative with the length of the fibres. The best resistance of the curls is found at the lambs with valuable, long and very long curls, with short and med. long fibres, with excellent and suitable silk, with supple and dense skin; The direction of curl abutment is in positive correlation with the type of modelling, with the qualities of the fibres, especially with their silk and gloss. So, the better the qualities of the hairpiece, the more the rolling direction of the curls is more valuable - to the head, tail or mixed (sinusoidal); The rolling degree of the curls is in a genetically negative (but beneficial for selection) relationship with the type of curl and the lamb class at the evaluation. The smallest degrees (but, desired - 6 and 7 points) are recorded in lambs with med. and large curls, with flat, costal, and jacket type of curl. The highest degree of rolling (undesired - 12 points) was recorded at lambs of class II with the type of kaukasian curl; The knowledge of the resistance and elasticity relationships, as well as curling of the curl with a string of other characters of the curls and hair fibres allowed the selection of the most valuable lambs in the breeding lots of the new sheep type Moldavian Karakul.

Key words: Peculiarities, resistance, elasticity, curling, curl, Moldavian Karakul