| 【Objective】In order to understand the genetic background and genetic relationship of sweetpotato
cultivars and provide references for parents selection and effective cross combination in sweetpotato breeding,
the sweetpotato cultivars bred in Guangdong Province from 1978 to 2016 were investigated and summarized.
【Method】Based on the information of 57 sweetpotato cultivars, which passed the national identification or provincial
approval, bred in Guangdong Province from 1978 to 2016, their profiles, parental source, pedigree and derived cultivars
were analyzed.【Result】Mainly bred by purposeful hybridization between varieties（59.6%）or polycrossing（29.8%）, Guangdong sweetpotato cultivars mainly include fresh food and fresh food and forage dual-purpose types, accounting for
86.0%. 57 cultivars could be ultimately traced to 61 direct parents and 42 original parents. Yubeibai, Zhanshu 75-57, Pushu
3 and Xinzhutou were the most frequently used original parents, and over 14 cultivars were derived from them. The pedigree
of sweetpotato cultivars bred in Guangdong Province was mainly composed of landraces or early local bred cultivars and their
derivatives, which could be clearly divided into four families: Zhanshu 75-57 family, Guangjie family, Guangpu family and other
family. These released sweetpotato cultivars have been used as direct parents, and 50 new sweetpotato cultivars have been bred,
some of which have been widely used in Guangdong Province, even the whole country.【Conclusion】The sweetpotato cultivars
bred in Guangdong Province and their parents showed obvious “Guangdong features”. In order to broaden the genetic basis of
sweetpotato cultivars, it is necessary to continue to widely introduce and collect excellent sweetpotato germplasm to Guangdong
Province, and accurately identify and evaluate the germplasm resources especially local germplasm resources for the breeding of
superior parents. |
