Study On Main Breeded Sweetpotatoes Sink-source Relationship In Fujian And Molecular Identification

In this paper, six main FUJIAN sweetpotato cultivars, including Yanshu 5,Jinshan 57,Fushu 26,Xiangshu 75-55,Yanshu 8-6 and Xinzhonghua were studied for the relationship between the structures of sink-source and yeilds。And the results were as follow: Jinshan 57 and Yanshu 5 showed the reasonable level of LAI,NAR,T/R and the higher level of chlorophyll,CGR,sink capacity,biolobical yields and economic coefficient, and their yields were more than others。Maybe the reason was that their relationships of sink-source which showed better coordination。In this paper, we also analysed the relationship of Jinshan 57 between the structuresof sink-source and yields at 4 different potash levels (KCI) (Og/m~2,9．6g/m~2,19．2 g/m~2,38．4 g/m~2)。And the results showed that Jinshan 57 grew with the best coordinatedstructure of sink-source at the 9．6g/m~2 potash level, but the sweetpotato growth and theyield raising would be suppressed by the higher or lower potash level。At the end, the technique of RAPD molecular markers was used to identify geneticdiversity of these six sweetpotato cultivars。The results showed that six sweetpotatocultivars have the similar genetic inheritance, but they have definite genetic inheritancedifferences。Six sweetpotato cultivars were divide into 3 groups in terms of the RAPD'sresults。And the author found that six cultivars could be indentified by the S27 primerwith 8 amplified fragments, regarded that DNA finger-print for identification of 6sweetpotato cultivars could be established by S27 primer。...