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    Assessment of Tolerance Level of some Cotton (Gossypium hirsutum L.) Varieties against Verticillium wilt (Verticillium dahliae Kleb.)
    (Univ Agr Sci & Veterinary Med Cluj-Napoca, 2010) Karademir, Emine; Karademir, Cetin; Ekinci, Remzi; Baran, Behzat; Sagir, Abuzer
    The objective of this study was to assess the tolerance level of some cotton varieties against Verticillium wilt (Verticillium dahliae Kleb.) disease. Verticillium wilt is one of the major constraint diseases of cotton production worldwide and also in Turkey. The study was carried out at the Southeastern Anatolia Agricultural Research Institute's naturally infected experimental area during 2004-2006. In this study, 10 different commercial cotton varieties were used as plant material. The experimental design was a randomized complete-block with four replications. During the cotton growing season, foliar disease index (FDI), vascular disease index (VDI) and vascular disease rate (VDR) were observed in addition to seed cotton yield and some fiber quality characteristics. According to the results, it was determined that with regards to FDI, VDI and VDR, the most tolerant varieties were 'GW-Teks', 'GW-Golda' and 'Carmen', while the most sensitive varieties were 'Maras 92', 'Sayar 314' and 'Stoneville 453'. The other varieties had moderate tolerance levels. The highest seed cotton yield and lint yield were obtained from 'DP-Deltaopal' and 'Stoneville 453; These results showed that some sensitive varieties had high yield; the reason for this situation may be related with early or late occurrence of the disease. The result of this study indicated that 'GW-Teks', 'GW-Golda' and 'Carmen' varieties must be preferred for infected areas; on the other hand, 'DP-Deltaopal' and 'Stoneville 453' can be recommended and grown in uninfected areas. Additionally, 'Carmen', 'GW-Teks' and 'GW-Golda' varieties can be used as material for improving disease resistance in cotton breeding programs.
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    DETERMINATION THE EFFECT OF DEFOLIATION TIMING ON COTTON YIELD AND QUALITY
    (Univ Zagreb, Fac Agriculture, 2007) Karademir, Emine; Karademir, Cetin; Basbag, Sema
    This study was carried out for determining the effect of different application times at 40, 50, 60 and 70 % boll opening and untreated plot of the defoliant on cotton yield, earliness and technological properties in Southeast Anatolia Region conditions in Turkey. Maras 92 cotton variety was used as plant material in the experiment field of the Southeast Anatolia Agricultural Research Institute during 2000-2001. Defoliant was including thidiazuron + diuron chemical substance. The result of this study showed that ginning percentage, 100 seed weight, seed germination percentage, fiber fineness, fiber length, fiber strength, reflectance, elongation and seed cotton yield were not affected by the treatment; plant height and first picking percentage in 2001, fiber uniformity in 2000 were 5 % significantly affected. This study showed that application of defoliant didn't affect significantly yield and technological properties of cotton and after 40 % boll opening the defoliant can be used.
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    THE EFFECTS OF HIGH TEMPERATURE STRESS ON SOME AGRONOMIC CHARACTERS IN COTTON
    (Pakistan Botanical Soc, 2017) Ekinci, Remzi; Basbag, Sema; Karademir, Emine; Karademir, Cetin
    High temperature is one of the abiotic stress causing morphological, physiological, biochemical and molecular changes on plant growth and productivity. One hundred and sixty cotton genotypes obtained from genetic stocks was evaluated for high temperature tolerance based on some agronomic characters under field and controlled conditions. Genotypes showed differences for all investigated characters. Plant height, node number and HNR ranged from 68.38-136.45 cm, 18.22-30.10 number. plant(-1), 2.89-6.31 (HNR) respectively. Maximum and minimum values in terms of number of sympodial branches, boll abscission at first position, number of seed and seed-cotton yield changed from 11.09-24.42 number. plant-1; 4.17%-20.80%; 20.39-44.11 number. boll(-1) and 5.74-60.30 gr.plant(-1) respectively. Differences among genotypes were statistically significant for all characters under high temperature stress conditions. High temperature stress was declined the cotton plant development, the decline are important for cotton breeders and cotton breeding programs on the genotypes less affected from high temperature.
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    SCREENING FOR HIGH-TEMPERATURE TOLERANT COTTON (GOSSYPIUM SPP.) BY USING SOME PHYSIO-MORPHOLOGICAL LEAF TRAITS
    (Parlar Scientific Publications (P S P), 2018) Ekinci, Remzi; Basbag, Sema; Karademir, Emine; Karademir, Cetin
    One hundred sixty cotton genotypes obtained from genetic stocks were evaluated for high temperature tolerance based on some physio-morphological leaf traits under field conditions and controlled condition. Genotypes showed differences for all investigated traits. In the study, stoma] density ranged from 83.49-128.35 stomata. (mm(2))(-1), stomata] conductance ranged from 140.77-394.90 mmol.m(-2).s(-1), stoma] width ranged from 92.39-154.01 mu m, stomatal rate of width/length ranged from 0.42-0.58, canopy temperature ranged from 20.24-52.00 degrees C, leaf area ranged from 67.50-173.05 cm(2), leaf SPAD value ranged from 31.80-63.73, and leaf photosynthesis yield ranged from 12.72-33.05 The results showed that high temperature stress did not influence stoma numbers, whereas it decreased stomatal conductance, stomatal width, stomatal width/length, leaf area, leaf SPAD and leaf photosynthesis yield; and that it increased canopy temperature values. The Fantom was determined to be tolerant with respect to stomata] conductance trait and the Tropikal-225 genotype with respect to stoma width and width/length traits.