The paper reports an assessment of productivity traits in 64 samples of oat (Avena sativa L.) of different ecological and genetic origin in the Kirov Oblast in 2023–2024. The goal of the work was to identify a group of productivity traits in oat associated with chlorophyll content in the flag leaf, as well as to identify genotypes which would be promising for higher productivity breeding. In the middle of the flowering period, total chlorophyll content in the flag leaf (Chlorophyll Content Index, CCI) was determined using the CCM-200plus chlorophyll meter. The experiments were carried out on sod–podzolic soil. The declared area of the plot was 5 m2. Experiments were performed in four replicates. On the whole, the period from sowing to maturity was perhumid (HTC = 1.73) in 2023 and slightly dry (HTC = 0.76) in 2024. On average for two years, a significant (at p ≤ 0.05) association was detected between yield, panicle weight, number of spikelets and grains in a panicle, and grain weight per panicle and per plant and the CCI index (r = 0.348…0.420). Panicle weight, the number of spikelets and grains in a panicle, grain weigh per panicle and per plant, and CCI was controlled by the first main factor explaining 37.6% of the total variability in the analyzed traits, and yield was controlled by the second main factor explaining another 20.3% of the variability. Atula 508-89 and Kulan are the most promising accessions for oat breeding aimed at improving panicle development (number of spikelets, number of grains, panicle weight, and grain weight per panicle). URS Penca, Donen, Hucul, UFRGS 086183-2 and UFRGS 086092-2 should be used in oat breeding for the improvement of such traits as plant height, panicle length, and 1000 grain weight.
Batalova et al. (Wed,) studied this question.