紧凑型玉米掖单4号、掖单2号的亲本特性观察及在制种中应用探讨

STUDY ON PARENT CHARACTERISTICS OF ERECT LEAF MAIZE YEDAN 4,2 AND UTILIZATION IN HYBRID SEED PRODUCTION

对杂交玉米掖单4号、2号的亲本掖107、黄早4、8112三个自交系的叶龄进程、生育特点进行系统观察,结果表明:欲夺取制种高产,掖单2号、4号的父本(黄早4)应较母本(掖107、8112)分别迟播18天、12天;在三个自交系叶龄指数为30、30～60、60～80、80～100几个关键时期,应抓好肥水管理。

Observations were made in leaf age proceeding and growth characteristics of parent inbrid lines Ye 107,Huangzao 4 and 8112 of hybrid maize Yedan 4 and 2. The results showed that higher yield of hybrid seed production will be got while maie parent(Huangzao 4)of Yedan 4 and 2 is planted later 18 and 12 days respectively than female parent Ye 107 and 8112, water and fertilizer management should be well done when leaf age indexes of three inbred lines are 30,30-60,60-80,80-100.