Breeding of a High Yield,Fine Quality,High β-carotene Content Sweet Potato,Quanshu No.10

Quanshu No.10 was a sweet potato bred from the female parent,Quanshu 267,by open-pollination.The variety was tested and certified by the Crop Variety Approval Committee of Fujian in 2010,as well as the National Crop Variety Identification Committee in 2013.It was chosen as a recommended variety in the Southern Regional Potential Yield Test in 2012.Its annual average fresh root yield was between 37.87and 43.40t·hm-2,which was 9.11%-27.62% higher than that of the reference variety,Jinshan 57 or Guangshu 87.Its annual average dry root yield was 8.91-11.13t·hm-2,which was 1.93%-10.03% higher than those of the reference varieties.The dry matter content of its fresh roots was about 24.9%,which was 1.5% lower than that of Jinshan 57,and 4.5% lower than that of Guangshu 87.The contents of β-carotene and vitamin C were 10.92and 17.45mg·hg-1,respectively,which were 7.6and 0.52mg·hg-1,respectively,higher than those of Jinshan 57.This newly bred variety also exhibited a high resistance to fusarium wilt,bacterial wilt I and bacterial wiltⅡ.