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    Effects of different priming applications on seed germination and some agromorphological characteristics of bread wheat (Triticum aestivum L.)
    (TUBITAK SCIENTIFIC & TECHNICAL RESEARCH COUNCIL TURKEY, 2015) Toklu, Faruk; Baloch, Faheem Shehzad; Karakoy, Tolga; Ozkan, Hakan
    This study was conducted to determine the effects of some priming treatments on seed germination properties, grain yield, and several agromorphological characteristics of bread wheat. Two commonly grown bread wheat varieties, namely Adana-99 and Pandas, were selected for experimentation conducted during the 2007-08 and 2008-09 growing periods. The seeds of the Adana-99 and Pandas wheat varieties were primed with the following: (1) distilled water, (2) 100 ppm indole-3-acetic acid (IAA), (3) 2.5% potassium chloride (KCl), (4) 1% potassium dihydrogen phosphate (KH2PO4), (5) 10% polyethylene glycol (PEG-6000), or (6) gibberellic acid (GA(3), used only for field experiments). Nonprimed seeds were used as the control group. First 1000 mL of priming media was prepared for each priming treatment, and seeds of both varieties were rinsed in the solution for 12 h at room temperature. Germination percentage at two different temperatures (10 degrees C and 20 degrees C), coleoptile length, seedling emergence percentage, and seedling growth rate were evaluated under laboratory conditions. Primed seeds of both varieties were sown on two different dates under field conditions to evaluate certain agromorphological characteristics. PEG, IAA, and distilled water treatments increased seed germination percentage, seedling emergence percentage, and seedling growth rate. PEG, KCl, and hydropriming treatments increased grain yield compared to the control. Among the different priming agents used in the study, PEG, KCl, and hydropriming were the most effective treatments to attain higher germination percentage and grain yield.
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    Variation for selected morphological and quality-related traits among 178 faba bean landraces collected from Turkey
    (CAMBRIDGE UNIV PRESS, 2014) Karakoy, Tolga; Baloch, Faheem Shehzad; Toklu, Faruk; Ozkan, Hakan
    Faba bean is cultivated worldwide and widely used in Mediterranean countries, Asia and Europe. However, only a few faba bean breeders are active in cultivar development. As a result, a limited number of varieties are available for growers. Plant genetic resources or germplasm are fundamental sources for plant breeding, and the assessment of the genetic diversity among germplasm accessions is useful to facilitate more efficient use of plant genetic resources. A mini-core collection of faba bean germplasm (178 landraces and four cultivars), from diverse geographic regions of Turkey, was assessed for agro-morphological performance and some quality traits. There were substantial variations for the investigated morphological and quality characteristics. The analysis of variance revealed that the differences among 182 accessions were significant for all the studied characters. Some accessions showed very good agronomic performance for some traits. Positive and negative correlations existed among different morphological and agronomic traits. Landraces have been classified into four different groups using a cluster analysis. These results suggest that an a priori classification of accessions according to the growing area does not strictly correspond to phenotypic grouping. From the spatial distribution of landraces, however, it has been possible to identify 'superior' accessions of some traits. These findings indicate a number of useful traits in the gene pools and a wide range of phenotypic variation that provides a good source of diversity for use in modern faba bean breeding programmes.
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    Variation of some seed mineral contents in open pollinated faba bean (Vicia faba L.) landraces from Turkey
    (TUBITAK SCIENTIFIC & TECHNICAL RESEARCH COUNCIL TURKEY, 2014) Baloch, Faheem Shehzad; Karakoy, Tolga; Demirbas, Ahmet; Toklu, Faruk; Ozkan, Hakan; Hatipoglu, Rustu
    The first step towards the biofortification of edible portions of crop species with improved nutritional value is to understand the genetic diversity available to breeders in germplasm collections. A faba bean germplasm (129 landraces and 4 cultivars) from diverse geographic regions of Turkey was assessed for micro- and macro element contents of seeds. The results showed high diversity in open-pollinated faba bean germplasm for contents of N (27.5-93.3 g kg(-1)), P (1.24-4.89 g kg(-1)), K (4.5-19.3 g kg(-1)), Fe (29.7-96.3 mg kg(-1)), Mn (15.5-29.2 mg kg(-1)), Cu (10.3-33.0 mg kg(-1)), and Zn (10.4-49.3 mg kg(-1)). Meanwhile, the ranges of mineral elements in the landraces were significantly higher than those in the commercial cultivars. Concentrations of these mineral elements were significantly and positively correlated with each other. Principal component analysis clearly split the faba bean landraces into 2 groups and the first 2 principal components accounted around 70.91% of the total variations. These findings indicate a wide range of variations for the investigated minerals in the Turkish gene pool that can provide a good source of diversity to use in faba bean biofortification for increased levels of available mineral elements and better yield.