| The paper summarized the progress of sweet potato on the polyploid and karyotypes, development of
molecular markers, construction of molecular genetic map袁and QTL Mapping. Also, the problems of construction of
molecular genetic map were discussed. Firstly, polyploidy of sweet potato is not clear yet, and karyotype information is
limited曰Secondly, the type and amount of molecular marker are both limited, especially those based on specific fragment
loci such as SSR and EST-SSR, and those based on disease resistance gene homologous sequences; Thirdly, the Molecular
marker genetic maps up till now have not met the requirement of practicability yet;Fourthly, small mapping group of F1
progeny restricts the construction of fine genetic map, and the accuracy of QTL;Finally, the aspects need to be improved
are also pointed out. |
