Abstract This study used eight genetic structures of Linum Usitatissimum L. (Sakha1, Sakha2, Sakha3, Sakha5, Sakha6, Giza, Syrian and Poloni) their half-exchange satire obtained according to the second method proposed by Griffing (1956). Genetic compositions (8 parents + 28 hybrids) were planted in fields Faculty Agriculture/University Kirkuk winter season (2021-2022) full random sectors (RCBD)...

Plasmid pBG 35 contains the whole rDNA unit from flax (Linum usitatissimum L.) (Goldsbrough and Cullis, 1981). We cloned four different Eco RI restriction rDNA fragments of pBG 35 in the plasmid vector pBluescript SK+ (pBS). One of the subclones (p2.1) contained the most part of the 5 ́-end of 18S rRNA gene (1581 bp) and was used as a heterologous DNA probe in molecular hybridization experiments...