Fine-tuned head weight estimation in globe artichoke (Cynara scolymus L.)

WOS: 000229399200005A novel and nondestructive method for head weight estimation in globe artichoke was described. Linear measurements on head height (h) and head diameter (2r) were performed on head samples of five cultivars and one developed clone having cylindrical conical or spherical head forms. The measurements on 2r were performed at the base in conical- and cylindrical-headed cultivars, while they were taken equatorially in spherically headed cultivars. Correlation and regression analyses were performed between single true head weights and eight different models [h, r, 2r, r(3), r(2)h, pi r(2)h (cylinder volume), (1)/(3) pi r(2)h (cone volume) and (4)/(3)pi r(3) (sphere volume)]. Since pi r(2)h and (1)/(3) pi r(2)h are folds of r(2)h, and (4)/(3) pi r(3) of r(3) ; r(2) h or r(3) had completely the same correlation coefficients as their folds, and hence were equally effective in the statistical analyses. Head weights were more precisely estimated when the r(2)h model (or their folds) was used for cylindrical and conical heads and the r(3) model (or their folds) for spherical heads then any other model. Coefficients of determination (R-2) explained the highest variability observed for true head weights when the r(2)h model was used as the independent variable in the regression analysis for cylindrical and conical cultivars (96.60% to 97.5%) and the r(3) model for the spherical cultivars (96.6% to 98.4%). Even though all correlation coefficients and regression F values were very highly significant (P < 0.001), 8% of estimated cases had < 10% deviations when one of the appropriate models were used in comparison to 66% of the estimated cases having < 10% deviations when, for example, the 2r model was used, the second most effective model for all types of heads. The agreement between true and estimated head weights was also tested, where the bias was lower for a cultivar-specific model vs. the 2r model. Discussions on applying the results to the selection procedures were made

Managing the variability in okra breeding programs by considering the preferences of the domestic market

International Symposium on Sustainable Use of Plant Biodiversity to Promote New Opportunities for Horticultural Production Development -- NOV 06-09, 2001 -- ANTALYA, TURKEYWOS: 000182075100018Two field experiments were conducted to collect data on yield, yield components, plant morphology characteristics and some basic pod quality characteristics. Data were subjected to factor analysis to work out the relationship among variables. Pod characteristics such as pod weight and diameter positively affected total yield, both characteristics less determinative as consumer preferences in the domestic market. Total yield was also highly and negatively related to early flowering behaviour; however, early flowering behaviour might also be integrated to local okras due to the high market prices in the early season. Vegetative plant structures such as final plant height, height of lateral branches and internodes length had no connection to pod yield, implying that selection for semi-dwarf plant structure would not disturb final plant yield.Turkish Soc Hort Sci, Minist Agr & Rural Affairs, Ege Univ Fac Agr, Turkish Sci & Tech Res Council, CIHEAM Mediterranean Agron Inst Chani

Dried tomato as a new potential in export and domestic market diversification in Turkey

8th International Symposium on the Processing Tomato -- JUN 08-12, 2002 -- ISTANBUL, TURKEYWOS: 000188788000070Dried tomatoes have gained much interest in the last decade as a new potential in both export and domestic marked diversification in Turkey. It can be regarded as a new tool in overcoming export bottleneck which paste tomatoes are confronted with in the last few years. Further, it can be adopted as a new food source in diversifying the domestic market. The future of dried tomato production in Turkey regarding characteristics of suitable production areas, improved production techniques and adaptation of new suitable varieties have been discussed and research needs outlined.Int Soc Hort Sc