关键词: 玉米杂交种, 瑞玉16, 品种选育, 适应性

Abstract: 【Objective】 Breeding strong heterosis maize hybrids and analysis the prolificacy and adaptability of Ruiyu16 comprehensively. 【Method】 By using the maize 1013 from the foreign as the base material, through pedigree method for eight generations, a new maize inbred-line K233 and the corresponding maize hybrid Ruiyu16(K233×21-ES) were successfully bred. Based on data from Sichuan′s maize regional test, used high stability coefficient method and Eberhat-Russel model to analysis the date. 【Result】 ①The results showed, the average yield of Ruiyu16 in regional test was 8 554.9 kg/hm², 11.8% higher than the control Chuandan14,and the yield increase location rate was 100% in two years,showed that it was a strong heterosis maize hybrid. ②The average high stability yield coefficient for two years was 77.5%, which was 7.5% higher than Chuandan14, its stability coefficient bi value was stable and close to 1 in the two years, which shows that Ruiyu16 was a high-yield and stable production variety with high yield and great potential in yield increasing. When the environmental index was 4 500-12 000 kg/hm², compared with the Chuandan14, there was a higher rate of yield increasing in Ruiyu16, especially at 7 500-12 000 kg/hm², the increasing rate exceeded 10% in two years. 【Conclusion】 That indicated Ruiyu16 is a hight-yield stable yielding variety with high yield and potential for yield increase, which is a strong advantage of corn hybrids, has a wide range of cultivation and has good production potential and application value, especially in high-level corn planting areas, the advantages are more obvious.

Key words: maize hybrid, Ruiyu16, variety breeding, adaptability