论文部分内容阅读
近几年来,我省棉花良种繁育和推广工作取得了很大的成绩。今年各主要棉区大都种上了岱字棉原种后代或新的良种。这对提高我省棉花产量与改进纤维品质会有显著的作用。人民公社生产队还应该在更新换种的基础上,认真搞好棉花种子田,通过种子田去杂去劣,并进行单株选择混合留种,保持良种的纯度和提高种性。 一、生产队为什么必须建立棉花种子田 棉花是常异交作物,自然过花串种(自然杂交)常在5％以上,杂交后代会发生分离现象。良种与劣种杂交,其后代分离出的类型坏的多好的少;就是一个良种与其它良种杂交,其后代也会分
In recent years, the province has achieved great success in breeding and promoting cotton varieties. Most of the major cotton growing areas this year, Dai word word cotton seed progeny or new varieties. This will improve cotton production in our province and improve fiber quality will have a significant role. People’s commune production team should also be updated on the basis of change, conscientiously do a good job of cotton seed fields, go to miscellaneous inferiority through the seed fields, and mixed selection of a single species of seed to maintain the purity of seed and improve species. First, the production team why cotton seed cotton must be established Field is often outcrops of cotton, flowers often cross (natural hybrid) often more than 5%, hybrid offspring will occur segregation. Good seed and poor seed hybrid, the offspring of the type of separation is much better and less bad; that is, a thoroughbred and other hybrids, their offspring will be divided