Breeding of the New Waxy Maize Hybrid Suyunuo No.5 with High Yield and Good Quality;

Growth Analysis of Hybrid and Tri-hybrid Larch;

The Problems in the Breeding of Corn Hybrids and their Countermeasures;

Danyu99(Dan6012) is a medium late maize hybrid bred in Dandong Academy of Agricultural Sciences in 2001 with the self bred inbred line Dan9942 as the female parent and the self bred inbred line Dan99 as the male parent.

The hybrid was tested in the pre-test of the regional test of late mature maize hybrid of Liaoning province in 2003 and was tested in the regional and productive test of the late mature maize hybrid of Liaoning province in 2004 and 2005.

Three full-sibling binary cytoplasmic male sterility(CMS) lines, 11 back-cross binary CMS lines, 10 half-sibling binary CMS lines, 10 CMS lines and 5 restorer lines Nanhui 04, Minghui 86, Fuhui 838, Xianhui 207 and Milyang 46 were chosen to make 50 single cross hybrids(SHs) and 120 modified single cross hybrids(MSHs) by the way of NCⅡ design.

Maize single cross hybrids“yundan”series i.

Maize single cross hybrids Yundan series of Jindan 39,Jindan 46,Yundan 19,Yungaoyou 1 etc,are bred by Cotton Research Institute,Shanxi Academy of Agricultural Sciences.

The research has been made on several agronomy characters of sister lines and sister crosses S 1 produced by self-breeding from a single plant of each of four materials as well as the characters of single crosses and modified single crosses composed of crossing sister lines and sister crosses with male parents.

The best hybrids among the four types--single cross, modified single cross, three way cross and double cross, Adaptable range of each hy- brid in five regions; The order of potentiality of regonal bionomical effect on productivity; The best sort of the same area on different hybrids produ.