Study of rice resistance to water deficiency

Abstract. Of the various abiotic stresses, most important limitation of rice production in many countries is drought or water scarcity. The aim study to collection, hybrid and breeding varieties samples for tolerance prolonged soil air drought, select drought-resistant forms new varieties. Methods. objects research – 68 dry land were cultivated irrigated flooded areas (Proletarsk, Rostov region) three repetitions. Plot area 10 m2, seeding rate 500 seeds/m2. Irrigation was carried out by release from irrigation canal after sowing on May with a layer cm during growth period complete drying surface. degree resistance determined ratio value trait test that control (T/C). Scientific novelty. different degrees grain productivity under conditions deficit sufficient supply, regularities revealed. Results. It found flooding formed yields, which, moisture deficit, averaged 63.7 % norm. correlation between yield upon weak positive (r = 0.23 ± 0.01), their T/C average 0.59 relationship medium negative –0.64 0.01). cultivars more than 75 identified, such as An-Yun-Ho, Chan-Chun’-Man, Zolotye vskhody, Malovodorebovatelnyy, ZULK 2, 6, which normal ranged 77, 9 91.6 %. maximum selection variety ARC “Donskoy” Argamak 6.10 t/ha samples: 7970 (Komandor × Chan-Chun’-Man) 5.24 t/ha, 8 4.90 t/ha.