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粒重是小麦产量构成的重要因素。在确保一定亩穗数和每穗粒数的前提下,籽粒发育好坏,容积大小及内容物的充实程度,对产量的高低有决定性作用。所以,研究小麦籽粒形成、灌浆过程和成熟,及其与外界条件的关系,探索提高粒重的途径,对夺取小麦高产具有重要意义。一、小麦籽粒的形成1.小麦的开花、受精和双受精过程当小麦雄蕊中的花粉粒和雌蕊中的胚囊成熟后,内外稃张开,花丝伸长,柱头伸
Grain weight is an important factor in wheat yield. Under the premise of ensuring a certain number of ears per panicle and the number of grains per panicle, the grain development is good or bad, the size of the contents and the degree of enrichment of the contents have a decisive effect on the yield. Therefore, the study of wheat grain formation, filling process and maturity, and its relationship with the external conditions to explore ways to improve grain weight, to seize the high yield of wheat is of great significance. First, the formation of wheat grains 1 wheat flowering, fertilization and double fertilization process when the wheat stamen pollen grains and pistils in the embryo sac mature, inside and outside 稃 open, filament elongation, stigma extension