论文部分内容阅读
“Ｍ丹”选系是用我国骨干自交系之一的“丹３４０”与含墨西哥引入的热带Ｔｕｘｐｅｎｏ种质和云南西南部地方种质的自交系“ＭＨ１２”杂交后自交分离选育而成的，它继承了“丹３４０”的配合力高，对大小斑病抗性强的优点，也纳入了低纬热带种质抗逆性强、抗穗粒腐病的特点。“Ｍ丹”参与组配的杂交组合在涉及产量的穗粗、穗行数、穗粒数和千粒重４个主要性状上具有明显的优势。用“Ｍ丹”选系参与组配的“通单２０２”、“通黄 ３号”和“通玉 ２号”在云南省区域试验和多点试种中产量均名列前茅，在生产示范中增产显著，抗多种病害，适应云南省立体气候的多种生态类型。新配优势组合“云试６号”、“云试８号”、“云试９号”、“通黄４号”和“通黄５号”等具有较高的产量潜力。“Ｍ丹”选系与美国玉米带种质选系、低纬热带、亚热带优势群ＥＴＯ、Ｓｕｗａｎ种质选系和我国贵州、云南等地的地方种质选系组配均有较高的配合力。
The “M Dan” selection line was self-pollinated with “Dan 340”, one of the key inbred lines in China, after crossing with the tropical Tuxpeno germplasm introduced in Mexico and the inbred line “MH12” of the southwest Yunnan germplasm It has inherited the “Dan 340” high combining ability, resistance to the size of the advantages of spot, but also into the low latitude tropical germplasm resistance, anti-panicle rot characteristics. The hybrid combination “M Dan” was obviously superior to the four major traits related to grain yield, including ear diameter, ear number, grain number per spike and 1000-grain weight. The output of “Tongdan 202”, “Tonghuang 3” and “Tongyu 2” participating in the group trials with “M Dan” was the highest in the regional trials and multi-point cultivation in Yunnan Province, and increased in the production demonstration Significantly, resistant to a variety of diseases, to adapt to the three-dimensional climate in Yunnan Province, a variety of ecological types. The new combination of advantages, such as “Cloud Test No. 6”, “Cloud Test No. 8”, “Cloud Test No. 9”, “Tong Huang 4” and “Tong Huang 5”, has a high output potential. The “M Dan” selection line is highly compatible with the germplasm selection lines of the US corn belt, the low-latitude tropical and subtropical dominant group ETO, the Suwan germplasm selection line, and the local germplasm selection lines of Guizhou and Yunnan in China force.