STUDY ON HYBRID SEED PRODUCTIVE TECHNOLOGY OF THREE LINE IN CYTOPLASMIC MALE STERILITY OF BRASSICA NAPUS L.Ⅰ.Effect of Hybrid Seed Productive Pureness on the Different Radio of Row,Sowing Date an Radio of Colony Structure
Under the ecologlgical conditions of Sinan county, cytoplasmic male sterlity line 1356A (derived from Shan 2A) and its restorer were used to produce hybrid rape seeds of Brassica napus to find the way for raising the purity of hybrid seeds. The results showed that purity would be raised by reducing the row radio of two parents and properly delaying the sowing date of the female and parent. The purity of hybrid seeds was related to growth vigor of two parents. The higher growth vigor and more flowering quant...