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inheritance tendency of Storage Root Quality Traits in F_1 Hybrids of ‘Xushu 25'and ‘Xu 22-5'

Agricultural Biotechnology 2014年第6期3卷 19-23页

作者： Meng KOU Qiang LI Yungang ZHANG Xin WANG Zhonghou TANG Wei TANG Xiuying LI Daifu MA Xuzhou Sweetpotato Research Center Sweetpotato Research Institute Chinese Academy of Agricultural Sciences Key Laboratory of Sweetpotato Genetic Improvement Chinese Academy of Agricultural Sciences

＇ Xushu 25＇ , ＇ Xu 22-5＇ and their reciprocal F1 hybrids were used as experimental materials to analyze the inheritance tendency of storage root quality traits of sweetpotato. The results showed that most of the storage root traits in F~ hybrids of ＇ Xushu 25 ＇ and ＇ Xu 22-5 ＇ were quantitative traits controlled by multi- pie genes. The carotenoid content in fresh storage roots of F1 hybrids was lower than that of parents, with the average genetic transmitting ability and average coeffi- cient of variation at 51.17% and 103.21%, respectively. The starch content in fresh storage roots reached mid-parent level, with the average genetic transmitting ability at 96.66%. The reducing sugar content in fresh storage roots of F, hybrids tended to be polarized; to be specific, most of the Ft hybrids exhibited higher re- ducing sugar content than their parents with high reducing sugar content or exhibited lower reducing sugar content than their parents with low reducing sugar content, but F~ hybrids with reducing sugar content ranging between that of their parents accounted for a small proportion. The soluble sugar content in fresh storage roots reached mid-parent level and tended to be lower than parents, with the average genetic transmitting ability and average coefficient of variation at 82.25% and 21.93%, respectively. The crude protein content in fresh storage roots of FI hybrids exceeded mid-parent level and tended to increase; positive-crossing and negative-crossing progenies exhibiting higher crude protein content than their parents with high crude protein content accounted for 15.53% and 16. 28%, respectively.

关键词： Sweetpotato F, Quality inheritance tendency

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