Abstract:

Difference between SPAD value and chlorophyll content of various genotypes of Brassica napus was compared, correlation analysis was conducted upon SPAD value and chlorophyll content, and the variation between two years was studied using five rapeseed varieties belong to winter, semi-winter, spring type, respectively. Results showed that the difference of SPAD value, chlorophyll a, chlorophyll b and total chlorophyll among genotypes were very significant. However, there was not difference between the materials for the carotenoid content. Positive significant correlation between SPAD value and chlorophyll content was observed, among which the highest degree of correlation of was found between SPAD value and the total chlorophyll (r =0.9082), followed by chlorophyll b (r=0.8366). Both of SPAD values and chlorophyll content were fluctuated between years according to the analysis.