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以徐薯25与徐22-5杂交后代为试材,研究薯块特性在不同生态环境下的变异规律,探讨甘薯块根特性与产量和品质的关系。结果表明,不同生态点甘薯块根特性的变异范围很广,其中薯肉色变异最大,薯皮色变异系数最小。所有薯块特性的基因型差异均达显著水平,薯形的环境效应达极显著水平;薯形受环境因子影响较大,薯皮色在不同基因型间差异更为显著,而薯肉色主要受其遗传特性与生态环境的共同影响。从相关系数看,薯肉色与总胡萝卜素、还原性糖和可溶性糖含量呈极显著正相关,与淀粉含量呈极显著负相关;从偏相关系数看,仅有薯肉色与总胡萝卜素含量呈极显著正相关,其他偏相关性不明显。在育种材料的多点评价中,薯皮色设定的标准要严格,薯肉色要适当放宽标准,对薯形不能强求一致,而且薯肉色较深的品系可能富含胡萝卜素。
The offspring of Xushu 25 and Xu 22-5 were used as materials to study the variation regularity of tuber traits in different ecological environments and to explore the relationship between sweet potato tuberous traits and yield and quality. The results showed that there were a wide range of variation in tuberous root characteristics of sweetpotato at different ecological points, among which the variation of sweet potato color was the largest and the variation coefficient of potato skin color was the smallest. The genotypes of all tuber traits all reached significant levels, and the environmental effects of tuberous tubers reached an extremely significant level. The tuberous shape was more affected by environmental factors, while the tuberous color differences were more significant among different genotypes. Its genetic characteristics and ecological environment together. Judging from the correlation coefficient, the flesh color has extremely significant positive correlation with the content of total carotene, reducing sugar and soluble sugar, and has a very significant negative correlation with starch content. From the partial correlation coefficient, only flesh color and total carotene content Very significant positive correlation, other partial correlation is not obvious. In the multi-point evaluation of breeding material, the standard of potato skin color should be strictly set, the standard of potato meat color should be relaxed, the same can not be applied to potato shape, and the carp with dark brown color may be rich in carotene.