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Karaagac O.,Black Sea Agricultural Research Institute | Balkaya A.,Ondokuz Mayis University
Scientia Horticulturae | Year: 2013

The use of grafted seedlings in Cucurbits has increased in recent years as interspecific hybrids between Cucurbita maxima Duch. and Cucurbita moschata Duch. have become the preferred rootstock for watermelon, melon and cucumber. The interspecific hybrid seed production of C. maxima×C. moschata mainly depends on genotype compatibility. In this study, different interspecific hybridization combinations were evaluated in order to obtain C. maxima×C. moschata rootstocks. The field experiment of this study was carried out in the çarşamba district of Samsun Province in 2009. The initial genetic materials were inbred and purified up to the S5 generation. These genotypes were selected based on plant vigor, hypocotyls characteristics and seed yields. A total of 234 pollinations of different combinations between twelve C. maxima lines and eleven C. moschata lines were performed. 79 interspecific hybrid fruits were obtained from these hybridizations. Crossing incompatibility was found to be highest in the MO8 lines (C. moschata) in all combinations. The MA4, MA9 and MA12 winter squash (C. maxima) lines were determined to be promising ones for obtaining hybrid seed yield. In conclusion, the MA9×MO8, MA12×MO2 and MA4×MO8 hybrid combinations were the most promising candidates for rootstock breeding. As a result of this study, these selected combinations will be used in the development of promising new rootstock cultivars. © 2012 Elsevier B.V. Source

Madakbas S.Y.,Ahi Evran University | Ergin M.,Black Sea Agricultural Research Institute
African Journal of Agricultural Research | Year: 2011

In this study, seeds from 51 bean genotypes obtained from the Izmir Aegean Agricultural Research Institute were multiplied under ecological conditions of the Samsun province in 2006. Similarities and differences in terms of morphological variation were identified for 16 genotypes carrying the phenological, morphological and pod characteristics of fresh bean in 2007. It was determined that the length of time between sowing to sprouting had an important relationship and a positive correlation with the date of initial flowering, 50% flowering and pod width in the correlation matrix. In the principle component analysis (PCA), the two initial PC axis explained the 53.9% of the total variation. The cluster analysis was based on 19 parameters. Five groups were obtained and shown in a dendrogram. High levels of variation between bean genotypes were detected. © 2011 Academic Journals. Source

Aydin N.,Karamanoglu Mehmetbey University | Mut Z.,Bozok University | Ozcan H.,Black Sea Agricultural Research Institute
Journal of Food, Agriculture and Environment | Year: 2010

Twenty-five wheat genotypes (Triticum aestivum L.) were grown at three locations (Samsun, Amasya and Tokat) in the Middle Black Sea Region of Turkey in order to estimate the broad-sense heritability for grain yield and some agronomic and quality traits. Estimation of the heritability will help to identify selection parameters in our breeding programs for target environments. The heritability for grain yield, test weight, 1000-kernel weight, Zeleny sedimentation, protein content and plant height were 46.05%, 86.88%, 81.82%, 89.13%, 87.45% and 43.69%, respectively. It was found that Zeleny sedimentation was the least affected trait over environments and followed protein content, test weight and 1000-kernel weight. On the other hand, grain yield and plant height were the most affected traits across environmental conditions. Source

In this study, a canonical correlation analysis (CCA) was used to estimate relationships between plant characters [X set-fruit length (FL), fruit width (FW), fruit wall thickness (FWT), placenta length, stem thickness, plant height (PH), leaf length, leaf width, flowering time (50%), and time to maturity], and yield components [Y set-total fruit weight per plant (FW/P), average fruit weight and number of fruits per plant (FN/P)] of 56 red peppers [Capsicum annuum L. var. conoides (Mill.) Irish] in populations collected from the Samsun province in the Black Sea Region of Turkey. All canonical correlation coefficients (0.708, 0.635, 0.413) between the pairs of canonical variables were found to be significant (P < 0.01). The findings obtained from the CCA indicate that FN/P had the largest contribution for the explanatory capacity of canonical variables estimated from yield components of 56 red pepper populations when compared with other yield components. FL and PH had largest contribution for the explanatory capacity of canonical variables estimated from plant characters when compared with other characters. The results of this study show that PH, FWT and FW should be used with the aim of increasing yield per plant in red pepper genotypes. Source

Arli-Sokmen M.,Ondokuz Mayis University | Deligoz I.,Black Sea Agricultural Research Institute | Kutluk-Yilmaz N.D.,Ondokuz Mayis University
European Journal of Plant Pathology | Year: 2016

Bean common mosaic virus (BCMV) and Bean common mosaic necrosis virus (BCMNV) are well-known legume-infecting potyviruses. The incidences of BCMV and BCMNV infections were determined by ELISA in 367 seed and leaf samples which were collected in 15 common bean-growing provinces of Turkey. Of the samples tested, 67 (18.2 %) occurred to be infected with BCMV, however only 5 (1.4 %) were infected with BCMNV. A total of 45 ELISA-positive samples were selected from single-virus infected ones to determine BCMV and BCMNV pathogenicity groups (PGs) by using a set of bean cultivars that contain different combinations of resistance genes. Some BCMV populations exhibiting unusual pathogenicity were identified. One of them, named TR-180, was found to overcome resistance conferred by bc-1, bc-12, bc-2 and bc-22 recessive alleles in common bean and assigned to PG VII. This isolate shared high (99 %) sequence identity with previously identified BCMV RU-1 and RU-1-related strains (RU1-OR-B and RU1-OR-C) according to a BLAST analysis of the nucleotide sequences of RT-PCR amplified products comprising the complete coat protein and 3′ partial NIb regions. The isolates TR-203 and TR-256 produced a distinctive reaction pattern in the dominant I gene-bearing bean cultivars Amanda and Isabella at lower (<30 °C) temperatures and were classified into PG IVb. These isolates were found to be 99 % identical to US-1 strain based on 3′ terminal nucleotide sequences of the BCMV genome. A fourth isolate, TR-243, involved mixed BCMV populations, as confirmed by partial nucleotide sequence analysis; one was classified as belonging to PG VII being similar to TR-180, and another was assigned to PG IVb. In conclusion, on the basis of both the reactions of differential bean cultivars and ELISA results, most of BCMV isolates were assigned to pathogroup PG VII and BCMNV isolates to PG VIb. This study is the first to show that four recessive resistance alleles of common bean can be overcome by a single field isolate of BCMV, and that a wide range of BCMV pathogroups are present in Turkey. © 2016 Koninklijke Nederlandse Planteziektenkundige Vereniging Source

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