辽宁省玉米杂优模式分析及种质基础

辽宁省玉米种质分为旅大红骨、改良Reid、外杂选、PN、Lancaster、塘四平头6个类群。通过对20年来审定玉米品种的杂优模式以及不同生态区主要种植品种进行分析,结果表明,在众多杂优模式中以改良Reid×旅大红骨模式应用最为广泛,说明旅大红骨种质在辽宁玉米育种中占主导地位。辽宁玉米种质资源匮乏,育种手段单一,急需加强与国内外的交流合作,拓宽种质资源,更新育种观念,明确育种目标,将现代生物技术与传统育种相结合,创造新的种质,从而提高玉米育种水平,以适应玉米生产发展的需要。

Analysis of Maize Germplasm Foundation and Heterosis Model in Liaoning Province

The maize germplasm in Liaoning province could be classed into 6 clusters, including Luda Red Cob(LRC), Improved Reid, derived from exotic hybrids, PN, Lancaster and Sipingtou. Analyzing the heterosis model of registered maize varieties and the main varieties planted in different ecoregions in two decades. The results showed that the improved Reid×LRC had been most widely used among many heterosis, which suggested that LRC germplasm play a dominant role in Liaoning maize breeding. But in Liaoning province, the genetic foundation of maize was narrow, and the breeding method was single. In order to improve the level of breeding, adapt the needs of the development of maize production, Urgent need to reinforce exchanges and cooperation with domestic and foreign, broaden germplasm resources, update ideas, and clear future breeding objectives, using the methods of advanced techniques combined with traditional breeding to create new germplasm.