This study was carried out during (2010/2011) growing season in the Vegetative Field Research,

K am al b en y am i n E s h o S af w a n H as i m S a eedEffect of humic aci d on growth and y ield of three culti v ars of summer squash ( Cu curbita pep o L.) ABSTRACT:The e xperim ent w as carried out in the private vegetable farm , Som ail, Duhok governm ent, during autum n growing season 2015, The aim of the experim ent w as to study the effect of humic acid on grow th and yield of three cultivars of summ er squash (Cucurbita pepo L.). The experim ent w as a split plot design within three replicates, in this study, three concentrations of hum ic acid w ere used (0, 25 and 59 mg/ litter), and three cultivars of summ er squash w hich w ere (Alexandria F1, Khatoon F1 and Ardendo 174 F1). The data w as recorded on: fresh and dry w eight /plant, num ber of m ale , female flow ers, sex ratio, length, diam eter, w eight of fruit, num ber of fruit/plant and total yield/hectare. The results show ed that the concentration at 50 mg/litter of humic acid gave a significant increase in fresh, dry w eight /plant, fruit length, number of fruits /plant and total yield, the cultivar Ardendo 174 F1 gave a significant increase in m ost traits except the sex ratio and fruit diam eter, and the interaction between the 50mlg/litter of hum ic acid and cultivar Ardendo 174 F1 gave a significant increase in fresh, dry w eight /plant, female flow er /plant , num ber of fruit/plant and total yield/hectare. The results show ed that there w as higher positive phenotypic correlation coefficient between the total yield /hectare, fruit w eight with m ost traits.

The current research aims to determine the DNA Finger Printing and Genetic Distance for 12 cultivars species of the genus Phasealus L Bean genus. Using RAPD-PRC Randomly Amplified Polymorphic DNA PCR indicators, which were extracted for DNA from young leaves of the cultivars, the purity and concentration regarding DNA have been measured with the use of a nanodrop device. Through the results obtained, the used primers were selected (804), including (478) general packages and (326) differentiated packages, and the occurrence of genetic fingerprints for most varieties characterized by some distinct packages amounting to (13) packages, including (8) unique packages and (5) An absent bundle, and the cultivar Brs - Pitanjo got the largest number of unique bundles, it owned (3) bundles. In contrast, the cultivars Brinco, Dellaregina, and massorn have been characterized to have the lowest number of bundles, amounting to (1) bundle. The absent bundles distinguished the two cultivars Brs - Pitanjo, BRs - Executive The highest number reached (2) bundles, while the Frasca variety recorded the lowest number of bundles reached (1) bundle.

The experiment was carried out during growing season (spring 2018) at the field vegetable experiments, department of horticulture and landscape design, college of agriculture and forestry, Mosul University to Study the line x tester hybridization [II] seeds yield and it's component in squash (Cucurbita pepo L.). The experiments materials consisted of 6 genotypes and two varieties as tester of squash plant

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