Seed productivity and adaptability potential of varieties and promising lines of sainfoin in the south of the Rostov region

Esparcet is not inferior to alfalfa in terms of fodder mass productivity, its nutritional value, content protein and other nutrients. The main tasks creating varieties sainfoin are the selection new, with high productivity green seeds, ecologically adapted, a sufficiently plasticity wide variation environmental conditions cultivation zones, varieties. purpose research assess plasticity, stability, stress resistance, genetic flexibility homeostaticity promising lines on basis “seed yield”. studies were carried out 2017-2021. Plot area 20 m 2 , fourfold repetition, seeding rate 500 pcs. germinating seeds per 1 . Seed harvesting was by direct combining. Over years research, seed yield higher for Atamansky variety (0.86 t/ha) Sin 3/2004 (0.88 t/ha), 5/2010 (0.91 3 /2010 (0.94 t/ha). It established that Veles (bi = 0.15), 0.29) Zernogradsky 0.32) react poorly changing conditions. values stability coefficient studied varied from 0.0009 0.0076. Sudar (σd 0.0009), 0.0010), 0.0015) have highest stability. Atamansky, Sudar, distinguished homeostaticity. they resistance.