Improving of Simple Selection Index to Determine Oat (Avena sativa L.) Genotypes for Dual Purpose Production

Abstract

Selection indices might be crucial to develop multipurpose genotypes in most environments for oat production. In this study, it was aimed to improve simple selection index value to determine oat genotypes for dual purpose production. The research was carried out in Kahramanmaraş conditions for consecutive two years between 2020-21 and 2021-22. In the research, a total number of 28 oat genotypes (10 landraces and 18 commercial cultivars) were used as plant materials and, plant height (PH), panicle numbers m2 (PN m2), grain number per panicle (GNP), 1000-grain weight (1000-GW), harvest Index (HI), dry hay yield (DHY) and grain yield (GY) traits were investigated. Based on grain yield and dry hay yield, formula of selection index value for dual purposed oat genotypes was determined; SI (Selection Index) = (AGYG (Average Grain Yield of Each Genotype) – AGYE (Average Grain Yield of Genotypes by the Experiments)/AGYE) + (ADHYG (Average Dry Hay Yield of Each Genotype)-ADHYE (Average Dry Hay Yield by Experiments)/ADHYE). Total selection index value was also obtained by collecting of selection index values belong to other investigated traits and dual purposed selection index values of oat genotypes. According to the results, TL227 with 0.455 value had the highest selection index which will be used in order to determine of dual purposed oat genotypes. This genotype was also followed by Kahraman (0.414), Kırklar (0.344) and TL341 (0.264) oat genotypes. These oat genotypes with higher selection index value may be suggested for both DHY and GY. Total selection index vales also pointed out same oat genotypes for experiment region. The results also showed that formula of this simple selection index value may be applied for the other cereals such as corn, wheat, barley sorghum etc. and as well as the other traits.

Keywords

• dry hay yield
• dual purposed
• grain yield
• oat genotypes
• selection index value
• yield related traits

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