CIMMYT种质对东农250亲本自交系的改良效果研究

本试验将CIMMYT种质Pob46和Pob45分别导入东农250的父本自交系吉846和母本自交系444中，研究CIMMYT种质对其产量及其他农艺性状的改良效果。结果表明吉846改良系和444改良系所配杂交组合的株高及穗位均有所降低，有利于增强组合的抗倒伏性；百粒重普遍增加但产量普遍降低，仅有个别组合增产；其它性状如雄穗一级分支数和行粒数等，二者改良效果有所不同。

Study on Improvement Effect of CIMMYT Germaplasm to the inbreds of a corn hybrid Dongnong250

CIMMYT germaplasm Pob46 and Pob45 were introduced respectively the male inbred lines Ji846 and female inbred lines 444. The improvement effect of yield and other agronomic characters was studied. It showed that in the hybrids crossed by the improved lines of Ji846 and 444, plant height and ear height were decrease, lodging resistance character was enhanced, ear-kernel weight was increased,. The yield of these crosses decreased commonly, only individual crosses increased; The improvement effect of some characters was different in these crosses, such as the first class branch number of tassel and kernel number per row.