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Over 2 billion ducks and about 224 million geese are kept all over the world under intensive and extensive systems for meat, eggs, fatted livers and plumage. On the basis of latest methods of population genetics, molecular genetics, cytogenetics and using various intraspecific and interspecies crossbreeding systems, the researchers from many countries are studying the genetic methods of waterfowl...
Badania krwi wykonano na 120 jarkach w wieku 18 miesięcy, z których połowę /n 60/ stanowiły czarnogłówki, pozostałe zaś były mieszańcami F1 po trykach Suffolk. Ustalono polimorliczne typy hemoglobin i transferyn, określono frekwencję genów, względną częstotliwość genotypów oraz udział homo- i heterozygot. Stwierdzono występowanie dwu alleli w układzie Hb - kontrolujących występowanie 2 genotypów...
The respective investigations concerned the growth of ewe- and ram-lambs originating from the third generation of synthetically bred meat-type lines of sheep. In both lines the genetic share showed Polish Merino sheep, Wielkopolska sheep and East-Friesian sheep and moreover in the A group - the sheep of three meat-type lines: Berrichon du Cher, Ile de France and Texel ("white-head" line)...
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