Environmental testing of winter bread wheat varieties and lines in the conditions of the southern part of the Rostov region

The current study was carried out in 2019–2021 using the material and technical base of FSBSI Agricultural Research Center “Donskoy”, order to research winter bread wheat samples various ecological geographical origin according productivity some economically valuable traits, identify most adapted them for conditions southern part Rostov region. objects were 17 variety testing. ‘Ermak’ used as a standard. As result study, there found that (2019–2021) ranged from 7.75 (‘Etana’) 9.52 t/ha (‘MV 15-04’). standard (8.20 t/ha) exceeded by 9 ‘Akhmat’, ‘MONE’, ‘KIV – 6’, ‘Astarta’, ‘Slavna’, ‘Chornyava’, ‘XE 9710’, ‘MV 15-04’, ‘No. 71 CIMMYT’, increase 0.45 1 .32 (0.42 with НСР05). According ‘heading date’, ‘KIV-6’, CIMMYT’ (May 19–20) belonged middle-early maturing group; ‘MONE’ 21–22) middle-late Astarta, XE 9710, MV 15-04 23–24) late group. ‘plant height’, variation 81.5 cm (‘Akhmat’) 100.3 (‘XE 9710’), had 99.5 cm. All studied medium-large-grain-sized group (34.05–40.72 g) ‘1000-grain weight’. Through years sample showed 0 points powdery mildew resistance (defeat field). There have been identified best septoria blight resistant ‘KIV-6’ (Russia) ‘Astarta’ (Ukraine), damage degree 5–10 %. 30–40 yellow rust, damaged on 50–60 %, 20–30 %; 0–5 remaining 9710’ 15-04’ this pathogen. complex traits practical breeding south region, three varieties (Russia), ‘Slavna’ (Ukraine) greatest interest.