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1971年以来,我们先后选育出恩单2号(77×五151)、咸金(咸203×金261)等玉米杂交种。其中恩单2号已成为我区玉米生产的主要当家品种,推广面积150万亩以上,约占全区玉米面积的70％,并在我省其它地区和四川等省的部分山区推广种植。但这些杂交种和它们的亲本都有一些突出的缺点。如恩单2号生育期太长,在低山、平坝易受干旱威胁,在1,400米以上的高寒山区,
Since 1971, we have breed corn hybrids such as En No. 2 (77 × 5 151) and salty gold (salty 203 × Jin 261). Among them, Enning No.2 has become the main type of maize production in our region. The promotion area is over 150 million mu, accounting for about 70% of the maize area in the whole region and is popularized in other mountainous areas in other provinces of our province and Sichuan. However, these hybrids and their parents have some outstanding drawbacks. Such as grace on the 2nd growth period is too long, in low mountains, Pingba susceptible to drought in the alpine mountains 1,400 meters above,