马铃薯高淀粉生理基础的研究——块茎淀粉含量与糖的代谢

本试验以高淀粉品种晋薯2号、中淀粉品种内薯3号和低淀粉品种紫花白为试验材料,设置了小区试验,在生育期间从还原糖和可溶性糖的代谢与块茎淀粉含量积累变化的相关关系进行了研究,其结果:(1)块茎淀粉含量的积累变化与叶片可溶性糖含量变化呈显著正相关关系.因此,叶片可溶性糖含量可做为马铃薯高淀粉育种早期选择和品质预测的重要生理指标;(2)块茎淀粉含量积累变化与叶片还原糖含量变化呈正相关,故叶片还原糖含量亦可做为马铃薯高淀粉育种早期选择和品质预测的生理指标;(3)块茎淀粉含量积累变化与茎秆、块茎可溶性糖、还原糖含量变化相关性不强,但生育后期与茎秆可溶性糖含量呈显著正相关.

STUDIES ON PHYSIOLOGICAL BASIS OF HIGH STARCH POTATOES THE RELATIONSHIP BETWEEN TUBER STARCH CONTENT AND SUGAR METABOLISM

In this experiment, three types of cultivars, i.e. high starch Jinshu 2, middle tarch Neishu 3 and low starch Zihuabai, were used as plant materials. During growing period, he relationships of the starch accumulation in tubers with the reducing and solvable sugar etabolism were studied The results showed: (1) the correlation between the starch accumulation n tubers and the solvable sugar change in leaves was positive significantly, suggesting that he solvable sugar content in leaves can be used as a criterion of early selection for high tarch breeding; (2) the starch accumulation in tubers was positively correlated to the educing ugar change in leaves, indicating that the reducing sugar content in leaves can also be used s riterion of early selection for breeding high starch potatoes; (3) the correlations of starch ccumulation in tubers with the solvable and reducing sugars in stems and tubers were not trong, but the correlation of starch accumulation with the solvable sugar content in stems was ositive significantly during late growing period.