DETERMINATION THE EFFECT OF DEFOLIATION TIMING ON COTTON YIELD AND QUALITY

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

Path Coefficient Analysis between seed cotton yield and some characters in cotton (Gossypium hirsutum L.)

Abstract: This study was carried out to determine direct and indirect effects of some characters (single leaf area, leaf SPAD value, number of nods, number of sympodial branches, number of monopodial branches, single boll weight, number of bolls) on seed cotton yield. The experiment was carried out with four cotton varieties, two of which okra-leaf (Adana 98, Siokra 1/4) and two of which normal-leaf (Teks and Stoneville 453) cotton (Gossypium hirsutum L.) and was conducted the randomized block design with 4 replications. In order to increase seed cotton yield in the studies of breeding program and selection orderly leaf SPAD value, number of sympodial branches, single boll weight, number of monopodial branches and number of bolls characters determined that must be high. Results showed that in order to increase seed cotton yield in the studies of breeding program and selection the highness of leaf SPAD value, number of sympodial branches, single boll weight, number of monopodial branches and number of bolls characters should be considered important. Key words: Yield, Path Coefficient, Correlation, Cotton PDF of full length paper is available online * Corresponding author: [email protected] Introduction There have been many factors which effect the cotton yield, like all plants. With regard to plant breeding studies, it is important that locations where plants are grown and determination of some traits which effect morphological and physiological characters of plants. Therefore, determination of direct and indirect relations among the traits is important in order to determine aspect of plant selection criteria

Path Coefficient Analysis between seed cotton yield and some characters in cotton (Gossypium hirsutum L.)

WOS: 000281449300020This study was carried out to determine direct and indirect effects of some characters (single leaf area, leaf SPAD value, number of nods, number of sympodial branches, number of monopodial branches, single boll weight, number of bolls) on seed cotton yield. The experiment was carried out with four cotton varieties, two of which okra-leaf (Adana 98, Siokra 1/4) and two of which normal-leaf (Teks and Stoneville 453) cotton (Gossypium hirsutum L.) and was conducted the randomized block design with 4 replications. In order to increase seed cotton yield in the studies of breeding program and selection orderly leaf SPAD value, number of sympodial branches, single boll weight, number of monopodial branches and number of bolls characters determined that must be high. Results showed that in order to increase seed cotton yield in the studies of breeding program and selection the highness of leaf SPAD value, number of sympodial branches, single boll weight, number of monopodial branches and number of bolls characters should be considered important.Southeastern Anatolian Agriculture Research InstituteTurkiye Cumhuriyeti Kalkinma BakanligiThis work was conducted Experimental Area of Southeastern Anatolian Agriculture Research Institute. We would like to thank them for support

Correlations between Some Physio-Morphological Formations and Yield on Okra and Normal Leaf Cottons

WOS: 000207576400003The leaf shape, size, area and number of leaf per plant of cotton are factors which effect seed yield via photosynthetic activity. In the study, the four cotton cultivars, two normal leaf shape and two okra leaf shape, were used as material. The number of leaf, mean of individual leaf area, leaf area index, leaf chlorophyll content, plant height, number of monopodial and sympodial branches and cotton seed yield were investigated. The coefficient correlation between cotton seed yield and all characters was analyzed. The normal leaf shape cultivars were the higher than okra leaf shape cultivars for mean of individual leaf area, leaf area index, plant height, number of sympodial branches. The highest chlorophyll content (50.54) was for Maras 92, but Dicle 2000 had the minimum content with 46.44. Maras 92 variety, okra leaf shape cotton cultivar, for cotton seed yield was the highest with 509.93 kg da(-1), Siokra (1)/(4) had the minimum cotton seed yield (365.56). Seed yield was pozitive correlation with leaf area index, but was negative correlation with number of leaf per plant

Heterotic Effects and Analyses of Correlation Relating to Some Characters on Cotton

WOS: 000262449900008This research was conducted at the Dicle University Faculty of Agriculture Experimental Area of Field Crops. The objectives of the study were to investigate the heterotic effects of earliness and agronomical and quality characters on F(1) and F(2) generations of cotton plant. In 2003, F(1) generation, and in 2004 F(2) generation were obtained, and in 2005, F(1) and F(2) generations were grown with parents in randomized block design with three replications. The highest heterosis was observed in the monopodial branch (-58.33%), and number of first sympodial branch (-30.85%), height of first sympodial branch (-13.87%), date of first square (-13.87%). However, the highest F(2) depression and F(2) deviations were determined the same characters