CAJ | 학술논문

为了对玉米群体进行合理有效的改良利用，通过改良S1选择法对12个玉米群体改良一轮后进行效果比较分析。结果表明，穗行数、行粒数和百粒重是构成产量的三因素，遗传增益最大的群体为蒙群2，其它依次为蒙群4、蒙群1等7个群体，蒙群3及3个国外引进群体遗传增益为负值；玉米群体在穗部、植株性状以及遗传变异中均存在一定的变化。试验研究得出，蒙群2、蒙群4、中综7号、蒙 C群、蒙 A群产量遗传增益均较大，并在其他农艺性状中改良效果显著，可直接选择优株自交进行选系，而其余7个群体遗传增益小，改良利用潜力不大。
위료대옥미군체진행합리유효적개량이용，통과개량S1선택법대12개옥미군체개량일륜후진행효과비교분석。결과표명，수행수、행립수화백립중시구성산량적삼인소，유전증익최대적군체위몽군2，기타의차위몽군4、몽군1등7개군체，몽군3급3개국외인진군체유전증익위부치；옥미군체재수부、식주성상이급유전변이중균존재일정적변화。시험연구득출，몽군2、몽군4、중종7호、몽 C군、몽 A군산량유전증익균교대，병재기타농예성상중개량효과현저，가직접선택우주자교진행선계，이기여7개군체유전증익소，개량이용잠력불대。
ln this study, 12 maize populations were improved with the improved S1 selection method, aiming to increase the improvement efficiency of maize popula-tions. The results showed that number of rows per spike, number of grains per row and 100-grain weight were the three important component traits of maize yield. The highest genetic increment was found in Mengqun 2, fol owed by Mengqun 4, Mengqun 1 and other 7 maize populations. Negative genetic increment was shown in Mengqun 3 and 3 introduced foreign maize populations. Some changes were shown in spikes, plant traits and genetic diversity of maize populations. Based on our results, we concluded that Mengqun 2, Mengqun 4, Zhongzong 7, Mengqun C and Mengqun A could be directly used for the line breeding by selfing for their higher genetic increment of yield and better improvement effects of other agricultural traits. Compared with these 5 populations, the improvement potential of other maize populations was limited for their lower genetic increment.