Turkish Journal of Field Crops

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HETEROSIS AND COMBINING ABILITY VIA LINE × TESTER ANALYSIS FOR QUALITY AND SOME AGRONOMIC CHARACTERS IN SAFFLOWER

Emrullah CULPAN, Burhan ARSLAN

Abstract

This research was conducted in 2018 and 2019 at Tekirdag Namık Kemal University, Faculty of Agriculture, Field Crops Department, Research and Experimental area. It was aimed to determine general combining abilities (GCA) of parental lines, specific combining abilities (SCA) of hybrids, having F1 hybrids from 5 female lines and 9 male testers. For this purpose, lines and testers were hybridized in all combinations using line x tester method in 2018. The field experiments for hybrids (F1) were designed in a randomized complete block with three replications in 2019. The male parents Linas as high general combiners for developing increased seed and oil yields in safflower hybrids. The highest heterosis for oil content was calculated EC18 hybrid (14.281%). The highest heterosis was calculated in EC2 (34.079%) and EC4 (34.548%) for seed and oil yield, respectively. In the study, similar heterotic effect was observed between seed and oil yield as there is interaction between them. Hybrid EC2, EC4 and EC18 were determined as best combinations for high seed yield, oil content and oil yield according to the SCA and heterosis values. The promising hybrids will be grown in the next generations together with the other hybrids in order to ensure sufficient variation, and the selection will be started in the later generations such as F3 and F4.

Keyword: Carthamus tinctorius L., Combining ability, Heterosis, Line x tester, Safflower ,
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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
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