摘要
利用蛋白质含量和产量各异的3个春小麦品种,Roblin、东农7742和新克旱9号,研究了灌浆过程中可溶性糖、淀粉和蛋白质积累规律,结果表明:籽粒灌浆过程中可溶性糖含量由开花14天开始逐渐减少,成熟期达最低值,品种间的差异仅表现在14天和20天两个时期:淀粉积累动态与可溶性糖变化规律相反,随灌浆成熟而逐渐增加,品种间差异达显著水平;蛋白质积累动态年际间稍有差异,总的趋势是随灌浆成熟而逐渐增加,开花后14天可溶性糖含量与淀粉含量和蛋白质含量有关,蛋白质含量与可溶性糖含量关系更为密切。成熟淀粉含量和蛋白质含量呈负相关。高蛋白品种在灌浆初期就表现出较高的积累合成蛋白质能力,而高淀粉含量品种同样在灌浆初期就表现出较高的淀粉含量,高产高蛋白品种介于两者之间。从生理角度分析,培育或通过田间管理达到高产优质是可行的。
The accumulation of starch and protein during grain filling of three wheat genotypes differing in both protein content and yield were investigated. The results showed that the soluble sugar content decreased gradually from 14 days after anthesis, and reached the lowest value at maturity. Significant differences among cultivars were observed only at 14 days and 20 days after anthesis. The accumulation of grain starch was contrary to that of soluble sugar, i. e. the starch content increased as the grain developed, and significant differences were found among cultivars. There were a slight yearly variation with the protein accumulation, but the general trend was that the protein content increased during grain filling. The soluble sugar content at 14 days after anthesis was related to the starch and protein content at maturity, particu arly the protein content. The starch and protein content of mature grains were negatively correlated. The high protein cultivar showed higher protein-accumulating ability even at the initial stage of grain filling, the high starch content cultivar showed the same tendency, and the high protein and high yield cultivar had both higher protein-accumulating ability and higher starch-accumulating ability. It is possible to select cultivars with both improved yield and higher protein content.
出处
《作物学报》
CAS
CSCD
北大核心
1996年第6期736-740,共5页
Acta Agronomica Sinica
基金
中国科学院留学生基金
关键词
春小麦
籽粒
淀粉
蛋白质
基因型
Spring wheat
Grain
Starch
Protein
Genotypes
