Abstract:
Yield components and genetic contribution in final yield have more important in crop plants
breeding programs. For this purpose, 20 grapevine genotypes were evaluated in Urmia and
Takestan research station (under full irrigation and drought stress). This research was performed
in randomized complete block design with three replications and three plants in each plot in
2012. Number of cluster per plant, Number of berry per cluster, berry weight and yield of each
plants were recorded. Compound and logarithmic analysis of variance, variance of genetic
components and environmental interaction effects were presented by multiplicative three
environmental and genotypic elements. Results indicated that number of cluster per plant had the
highest genetic contribution in final yield and the most sensitivity and variation in different
environments. Direct effect of number of cluster per plant in final yield (0.61) was higher than
direct effect of number of berry per cluster (0.48) and berry weight (0.30). V3 value was higher
than V2 and V2 was higher than V1, therefore sequence of manifestation of yield components
were number of cluster per plant, number of berry per cluster and berry weight, respectively.
Environmental components of interaction effects were indicated that absolute value of r1 was
higher than r2 and r3. This case indicated that number of cluster per plant was higher sensitivity
than other main yield components in different environments. |
