METHOD FOR CREATING OF EARLY-MATURING BASIC MATERIAL FOR SUNFLOWER SELECTION Russian patent published in 2006 - IPC A01H1/04 

FIELD: agriculture.

SUBSTANCE: method involves sowing seeds of basic parent form in preliminarily selected geographic point at super early time as compared to time optimal for the given culture and region; growing plants under natural conditions defined by this sowing time, i.e., under long day conditions; selecting from cultivated plants those with shortened "germination-flowering" period, for the purpose of which registering early flowering plants to leave such plants for crossing procedure and removing remaining plants; subjecting early flowering plants to crossing procedure by providing group repolination under free flowering conditions, with spatial isolation from "random" sunflower plants flowering during this period of time and not participating in experiment being provided; growing said plants to maturing stage; selecting therefrom plants with shortened "flowering-maturing" period and high coefficients of complex of economically valuable features; sowing seeds of these plants at late time as compared to optimal time for the given culture in the given region in this geographic point; growing plants under natural conditions defined by this sowing time, i.e., under short day conditions; selecting from grown plants those with shortened "germination-flowering" period; subjecting these plants to crossing procedure; selecting plants with shortened "flowering-maturing" period, etc as well as after super early sowing; using seeds selected from plants obtained after late sowing as early-maturing basic material for sunflower selection.

EFFECT: increased efficiency, accelerated and high-precision identification of early-maturing highly adaptive sunflower genotypes for various climatic cultivation zones.

3 cl, 1 dwg, 2 tbl, 1 ex