Turkish Journal of Field Crops

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YIELD PERFORMANCES OF WINTER WHEAT (T. aestivum) GENOTYPES IMPROVED FOR DRY ENVIRONMENTAL REGION OF TURKEY

Ramazan AYRANCI

Abstract

The purpose of he study was to determine the progress of winter wheat cultivars developed during the last 45 years under the ecological conditions of Kirsehir province located in central Anatolia. A field trial arranged in Randomized Complete Block Design (RCBD) with four replications was conducted in 2017 and 2018.As a result of two years of research, it has been determined that cultivars have a grain yield between 2490 kg ha-1 (Gun 91) - 3620 kg ha-1 (Karahan 99) and fertile spikes number per square meter 377 - 552, grain number per spike 28.81 – 41.83, grain weight per spike 1.07 g – 1.52 g, harvest index 26.17% - 37.07%. The annual yield increase of the cultivars with genetic progress was found to be 10,29 kg ha-1 . While it was determined genetic progress in 6 of total 11 traits, was observed negative genetic change in the other traits. Specifically, it was determined that the genetic improvement seen in the grain number per spikelet, grain number per spike, grain weight per spike, biomass yield and harvest index characteristics were found to contribute to the increase in grain yield. Characteristics seen genetic progress, have come to the forefront as selection parameters that wheat breeders working on rainfed conditions should emphasize. In addition, Karahan 99, Nacibey, Bayraktar 2000, Izgi 2001 and Bagci 2002 cultivars were determined as cultivars that could be recommended to be grown in dry environments of in winter region of Turkey.

Keyword: Agronomic traits, bread wheat, genetic improvement, yield ,

Effects of Different Water Stress Levels on Biomass Yield and Agronomic Traits of Switchgrass (Panicum virgatum L.) Varieties under Semi-Arid Conditio

Erdal GONULAL, Suleyman SOYLU, Mehmet SAHIN

Abstract

A field experiment was conducted in the Wielkopolska region at the Gorzyń Research Station, Poland (52.34°N, 15.54°E) in Central Europe. The study was conducted over a 3-year period (2017, 2018, 2019) as a two-factorial design with four replications in the RCBD. The aim of the research was to determine the effect of the cultivar (‘Bolero’, ‘Tytan’) and the inoculation (Nitragina–seeds inoculation, Nitroflora I–seeds inoculation, Nitroflora II–soil inoculation, HiStick® Lupin–seeds inoculation) on plant development, seeds chemical composition and yielding of narrow-leaved lupin. The weather conditions and experimental factors significantly influenced on productivity of narrow-leaved lupin ‘Tytan’. Drought during the growing season reduced seeds and protein yields. After inoculation of HiStck the seeds yield was significantly greater by 12.4% (p < 0.01) and the protein yield after application of Nitroflora I or HiStick by 13.9% (p < 0.01) and 19.2% (p < 0.01), respectively. Correlation coefficients showed strong relations between number of pods and seeds per plant in both cultivars regardless of the inoculation variant, however the strongest relations in both cultivar were proved on HiStick treatment.
Keyword: Biological nitrogen fixation, chemical composition, legumes, protein efficiency, yielding