CAJ | 학술논문

以引自美国和选自美国血缘的自交系为基础材料，组建玉米辽综群体。采用S1表型选择法、S1家系密植鉴定选择法、配合力选择法对玉米辽综群体进行3轮改良，系统评价8个改良群体的育种潜势。结果表明，S1家系密植鉴定选择法改良群体效果显著，且方便、实用。以密植鉴定选择法改良的群体辽综C3-3穗行数增加明显、产量性状GCA水平较高、育种潜力较大。以其为基础群体，运用S1密植选择法结合新种质导入进行后续两轮改良。从不同轮次的改良群体中陆续选育出了6个优良玉米自交系，组配出6个相应的玉米杂交种通过国家或省级审定，新品种累计推广面积122.5万hm2。
이인자미국화선자미국혈연적자교계위기출재료，조건옥미료종군체。채용S1표형선택법、S1가계밀식감정선택법、배합력선택법대옥미료종군체진행3륜개량，계통평개8개개량군체적육충잠세。결과표명，S1가계밀식감정선택법개량군체효과현저，차방편、실용。이밀식감정선택법개량적군체료종C3-3수행수증가명현、산량성상GCA수평교고、육충잠력교대。이기위기출군체，운용S1밀식선택법결합신충질도입진행후속량륜개량。종불동륜차적개량군체중륙속선육출료6개우량옥미자교계，조배출6개상응적옥미잡교충통과국가혹성급심정，신품충루계추엄면적122.5만hm2。
Liaozong maize population was created from American germplasm as basic materials. Three circles of the improvement on Liaozong maize population were made by the methods of S1 phenotypic selection, S1 high-density selection, and combining ability selection. Breeding potential on the 8 populations had been evaluated systematically. The results showed that the S1 high-density selection method has gained a better result, which is characterized by its simple, convenient and functional method on pratical operation. Synthetic groups of Liaozong C3-3 were better on rows of ears, higher yield level(GCA) and great potential of breeding material. The method of S1 density selection was used for further two cycles improvements with new germplasm introduced into Liaozong C3-3. Six good hybrids from different cycle populations were approved by national or provincial maize cultivar registration board, which had been released with an acreage of 1.225 million hectares.