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Abstract
One of the important fields of carp breeding work is improvement of the commercial traits of created carp breeds or cross-breed commercial crosses. The main indicator determining the value of commercial fish is edible carcass yield depending on the interior (relative weight of carcass edible parts) and the exterior (high spin, ratios of head and body girth, type of scale) indices. The paper presents the results of researches on interior indicators (body parts ratio) of twoyearlings of two-breed crosses obtained from crossing of adapted fourth generation imported breeds grown in Belarus with carp lines of Belarusian selection. The edible part of carcass size varied from 60.7 % (three prim x fresinet) to 66.7% (GermançLahvinsk scaly), averaging 64.0 % in the two-breed crosses studied. Compared with the average population yield of carcass in twobreed crosses, statistically significant advantages were determined in combinations of crossing with German carp. In this regard, quite high indicators were also observed in combinations with the Yugoslav carp, where it was used as the maternal component of crosses, and in combinations obtained from crossing the Mirror Isobelin carp with a Butterfly breed. Based on comprehensive assessment of interior indicators, a number of crosses have been determined with increased nutritional value of carcasses, among which the maximum nutritional value was shown by the cross Germançthree prim. The obtained data are of practical importance for creation of industrial hybrids with attractive commercial traits.
Highlights
One of the important fields of carp breeding work is improvement of the commercial traits of created carp breeds or cross-breed commercial crosses
Complex characteristics of two-breed crosses according to morphological indicators
В. Таразевич [и др.] // Рыбоводство и рыб
Summary
Аннотация: Одним из важных направлений селекционной работы в карповодстве является улучшение товарных качеств создаваемых пород карпа или межпородных товарных кроссов. В работе приведены результаты исследований интерьерных показателей (соотношения частей тела) двухлетков двухпородных кроссов, полученных от скрещивания адаптированных импортных пород четвертого поколения, выращенных в условиях Беларуси, с линиями карпа белорусской селекции. У изученных двухпородных кроссов величина съедобной части тушки колебалась от 60,7 % (три прим ç фресинет) до 66,7 % (немецкий ç лахвинский чешуйчатый), составляя в среднем 64,0 %. По сравнению со средним популяционным выходом тушки у двухпородных кроссов статистически значимые преимущества установлены у комбинаций скрещивания с немецким карпом. На основе комплексной оценки интерьерных показателей установлен ряд кроссов, обладающих повышенной пищевой ценностью тушек, среди которых максимальной пищевой ценностью обладал кросс немецкий × три прим. И. Пищевая ценность двухлетков карпа различных межпородных кроссов / Я. Fish Industry Institute, the National Academy of Sciences of Belarus, Minsk, Belarus
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