Lohinov M. Theoretical basses of fiber flax breeding on decreasing of spinning properties of fiber and methods of its quality determination in creation of high – productive varieties.

Object – regularities of fiber flax signs inheritance, methods of fiber flax quality determination, breeding methods, varieties. Aim of investigations – to establish regularities of fiber quality signs' inheritance, to determine inter-connecion between those signs, to make up methods of determination of fiber twining ability of individual plants, to improve breeding methods for yield increasing and fiber quality. Methods – dialelle, corelation, field, laboratory and mathematically-statistic analisis of signs' inheritance. Novelty – it is established the caracter of signs' inheritance, which determines fiber quality-flaxibility, durability, braking refuse and yarms rated quality. It is proved, that fiber quality must be determined in elite plants of the second or third hybrids generations because of revealing of biggest quantity of effects domination. Methods of determination of fiber quality of individual plants, which are fiirstly used in breeding practice for mass analyzing and selection, are esta