Abstract

Ghanbar laei¹, Mohammad Reza Bihamta*², Reza Azizinezhed¹ and Farokh Darvish Kojour¹

DOI : http://dx.doi.org/10.13005/ojc/320448

This study aimed to examine the relationship of percentage and oil yield with the physicochemical properties of native castor genotypes, specifically 28 castor genotypes from 27 native castors and 1 modified castor distributed in Iran. A randomized complete block design with three replications was conducted in 2014 and 2015 at the Research Farm of Islamic Azad University in Damghan, Iran. In the growth period, the following traits were sampled: grain yield, oil percentage, oil yield, weight of 1,000 seeds, length of seeds, width of seeds, grain volume, number of seeds per plant, Relative Water Content (RWC), Seed Color, leaf, vein, stem color, and chlorophyll fluorescence rate. After data were collected, variance analysis was conducted through SAS, and means were compared through Duncan’s test at 5% probability level. Correlation coefficients were calculated, and cluster analysis was performed to group the genotypes. Graphs were drawn with Excel. Results indicated that the studied traits were diverse. The seed oil percentage of the native castor genotypes differed; hence, they were classified into four genotypic groups. At 1% probability level, seed yield was positively and significantly correlated with oil yield (r = 0.85**). This finding indicated that oil yield increased. Thus, oil yield in castor can be decreased. This parameter can also be used as a reference in breeding programs.

Castor; Genotype; Chlorophyll fluorescence; Oil yield

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