الفهرس | Only 14 pages are availabe for public view |
Abstract Root-knot nematodes (Meloidogyne spp.) are one of the most destructive pathogens of vegetables. This study was conducted during the period from 2011- 2013. In the present study, 14 different Inbred lines of cucumber (C. sativus L.) in addition to Beit alpha variety were tested for their response to M. incognita by inoculating with the second stage juveniles (J2s) of nematode. All cultivars behaved differently regarding formation of galls Females number and egg masses. Results revealed that none of the tested cultivars was immune or highly resistant, There were significant differences in inbred lines for M. incognita resistance, inbred number 7 gave the highest number of galls, females, egg masses and number (J2s) in the soil which considered a Moderately susceptible (MS) followed by cultivar Beta alpha, while inbred number 4 and 5 gave the lowest number of galls, females, egg masses which considered a resistant (R). Regarding to the horticulture parameters the obtained results indicated that all inbred lines had superiority on the commercial variety Beit alpha (control) in the main stem length. The inbred (11) gave the highest value of plant length. Concerning, the total yield showed that, inbred (8) gave the highest value of early and total yield (g/ plant) whereas inbred(11) gave the lowest value of early and total yield (g/ plant). Quantitative genetic parameters obtained of number of galls, the negative potence ratio (p) with vale (-0.38), the heterosis values for mid and high parent were -25 % and -55 % respectively, the gall number was found to be controlled by one pair of genes and Quantitative genetic parameters obtained of total yield The positive value of potence ratio (p) (1.3) indicated the over dominance for total yield character over the midparent and high parent The heterosis values for mid and high parent were 57.8 % and 10.6 % respectively, Data showed also that, total yield was controlled by one pair of genes, The estimates of Values of Broad and narrow sense heritability were in high values 90.0 % 36.4 % respectively. |