Studies on correlation between flowering and maturing stage in pears

It is known that in the phenophase of crops exists several correlations. Former studies showed that the flowering stage was significantly correlated with the maturing stage in a negative manner and that the flowering stage could be used as the basis for early identification of the future fruit maturing stage. To study the correlation between the flowering stage and the maturing stage in pears, 113 pear varieties and 3 cross combinations consisting of 165 hybrid seedlings were used as materials to study the correlation between the flowering stage and the maturing stage in pears. The results showed that, in pears, there was a tendency that the later the flowering, the earlier the maturing, and that the florescence of very early flowering was significant later than middle and late maturity varieties. There was significant negative correlation between flowering period and fruit maturing period of 113 varieties. However, there was no correlativity in four maturity types, very early maturity, early maturity, middle maturity and late maturity, and the three cross combinations got the same results. The relatively centralized maturing stage of hybrid seedlings may constitute the main reason for the insignificant correlation between the flowering stage and the maturing stage thereof. So, florescence can't be used to predict maturity in not extensive segregation cross combination.