Flax is an important agricultural crop grown both for fiber and oil. Depending on the purpose of cultivation, flax is divided by morphotype into fiber flax, characterized by a long stem with low branching, and linseed flax, which has a large number of seeds and inflorescences. To characterize samples with different morphotypes, single nucleotide polymorphism data are usually used, but analysis of the insertion patterns of mobile elements can complement the analysis, since mobile elements represent a significant part of the plant genome and are under selection as well as single nucleotide polymorphisms. In this paper, we analyze the location of new insertions of mobile elements in flax samples with different morphotypes and breeding status, as well as identify sequences characteristic of different groups of samples. An analysis of the location of mobile elements in old-world varieties and kryazhs (ridges) shows a relationship between the pattern of the distribution of insertions and climatic data, which confirms the presence of directional selection among the insertions.
Duk et al. (Thu,) studied this question.