摘要
实践证明,应用多年的优良自交系,容易发生混杂退化,丧失其固有的优良特征特性,其生长势、自身产量、配合力均有不同程度的下降;通过选化利用,使白玉米自交系“沈219”的这些性状特点得以恢复、提高,并组配出优良杂交种在农业生产上推广利用。
The excellent inbred lines are usually lost their good characteristics by mixture and degene ralion after being applied for several years . Their growing power yield and combining ability will be reduced also . The excellent features of shen 219 have been improved by selection and application. Several fine hybrids have been breded and applied to agricaltural production.
