K型杂交小麦901及亲本籽粒灌浆的生长分析

 为准确了解杂交小麦901的籽粒灌浆特性，用Matlab程序Richards 方程 对杂交小麦901及其亲本的籽粒灌浆资料用进行计算机拟合。结果表明，杂交小麦901籽粒活跃生长期比常规小麦陕229长约6 d，其最终粒重（43.7 g?1000粒-1）也比陕229（36.3 g?1000粒-1）高。杂交小麦和父本R205的N值均小于1，其灌浆前期籽粒生长迅速，中后期生长逐渐减慢。常规小麦陕229的N值大于1，灌浆前期生长较慢，中期生长迅速。从灌浆阶段的划分来看，杂交小麦901灌浆前期历时较短，中后期历时较长，而陕229与之相反。亲本中，父本R205的灌浆特性与杂交小麦901较相似，母本不育系K3314A却与陕229相似。用Richards方程拟合4个小麦品系的灌浆过程比用Logistic方程更适合。

Growth Analysis on the Process of Grain Filling in Hybrid Wheat 901 and Its Parents

Using Matlab process, the grain filling process of hybrid wheat 901 and its parents was fitted by Richards equationon computer in order to study the characteristics of grain filling in hybrid wheat 901. The active grain growth period of hybrid wheat 901 was 6 days longer than that of Shan 229, its final grain weight (43.7 g?1000-grain-1) was higher than that of Shan 229 (36.3 g?1000-grain-1). N values of 901 and R205 were both less than 1, their grain growth was fast in the early filling stage, slower in the middle-late stage. N value of Shan 229 was > 1, its growth was slow in the early stage and fast in the middle stage. The duration of early stage of 901 was short and the duration of middle-late stage of 901 was longer. The situation of Shan 229 was totally reversed. In parents, the father plant R205 was similar with hybrid wheat 901, its mother plant K3314A was similar with Shan 229. It was also found that Richards equation was more suitable for fitting the grain filling process of wheat than Logistic equation.