Agrobiological study of the collection of winter rye

Abstract

The paper presents the results of studying collection samples of winter rye for yield and agrobiological traits in the Kirov Region. The authors conducted the field research in 2021–2022 at the experimental field of the Federal Agricultural Research Center of the Northeast (Kirov City). The study aimed to identify sources of valuable traits for breeding winter rye in the Kirov Region. Weather conditions contributed to the manifestation of the adaptive potential of the samples. Overwintering conditions were at the climatic norm level. Drought in May 2021 (hydrothermal coefficient 0.8) led to a deterioration of spike indicators. More favourable moisture conditions during the spring-summer vegetation were observed in 2022 (hydrothermal coefficient for May-July 1.2–2.5). As a result of the study, the most adapted samples were identified: K-10474 Edelhofer New, K-10394 Otello, Snow 2 242/15, K-10028 Low-stemmed, with productive stem density of more than 200 pcs/m2 and yields of 168–180 g/m2. Sources of high earliness (52–56 pcs.) and spike productivity (1.75–1.86 g) were identified, such as Snow 2 242/15, K-11821 Donskaya, K-11823 Nika 3; spikelet quantity per spike (33 pcs.) – K-11515 Pallada, K-11649 UH 14; 1000 grain weight – K-11693 Warko (33.6 g). For selection for lodging resistance, promising samples are K-11674 Talovskaya 2, K-11635 Polko, K-11649 UH 14, donors of dominant monogenic short stem K-10028 Low-stemmed, donors of recessive polygenic short stem K-10149 Carstens, K-10229 Danae. To increase the genetic diversity of breeding material of winter rye in the Kirov Region, samples K-10394 Otello (Sweden), K-10474 Edelhofer New (Austria), K-11410 SCW 1662 (Germany), K-11693 Warko (Poland), Snow 2 242/15 (Russia), K-11821 Donskaya (Russia), K-11823 Nika 3 (Russia), K-10028 Low-stemmed (Bulgaria), K-11515 Pallada (Ukraine) are proposed for crossing with local varieties.