The study on inheritance trend of main economic traits in sweetpotato
The inheritance law and correlation of main economic traits of sweetpotato were analyzed using 155 hybrids and two parents as the test materials. The results showed that the 13 economic traits tested distributed widely and varied substantially among the hybrid generation,in consistent with the inheritance law of quantitative characters. The highest variance was found in carotene content,coefficient of variance (CV)=117.6％. The lowest variance was detected in starch content, CV=10.8％. Thecombina-tion heritability (Ta) of dry matter content of vines,protein content,starch content and number of storage roots were high,more than 100％. The Ta of length of vines,stem diameter,dry matter of root and reducing sugar were intermediate,ranging from 91.4％ to 95.7％. The Ta of number of branches,top fresh weight,root fresh weight,carotene content and soluble sugar were low,ranging from 51.9％ to 82.1％. Through indirect selection for moderate length of vines and stem diameter,more branches and storage roots,higher top fresh weight,and lower dry matter content of vines,the aim of high-yield breeding could be reached. The correlation analysis showed that concurrent selection for high％ carotene,high％ reducing sugar,and high％ soluble sugar might be easier,but concurrent selection for high％ carotene, high％ starch,high％ reducing sugar,high％ soluble sugar,and high％ protein could be more difficult. Our results suggest that the high-yield and high-starch breeding may be easier,while the high-yield and highprotein breeding could have more difficulties.
sweetpotato economic traits inheritance trend
KOU Meng LI Qiang MA Dai-fu ZHANG Yun-gang WANG Xin TANG Wei LI Xiu-ying
Sweetpotato Research Institute, Chinese Academy of Agricultural Sciences/ National Sweetpotato Improvement Center,Xuzhou 221121,China
国际会议
徐州
英文
161-172
2010-11-27（万方平台首次上网日期，不代表论文的发表时间）