Abstract:

The new maize variety ‘Xundan 658’ was bred by Hebi Academy of Agricultural Sciences by using ‘Xun 58’ as female parent and ‘Xun G6Y62’ as male parent. In 2020, the variety was approved by the National Crop Variety Approval Committee, and in 2021, the variety was approved by Henan Provincial Crop Variety Approval Committee. The results of multi-year and multi-site tests showed that the new maize variety could adapt to the climate change trend of Huang-Huai-Hai plain and had the characteristics of strong stress resistance, high density tolerance, stable and high yield, good seed setting ability, superior quality and high starch content, and could be used for both grain and forage. As a whole, in order to provide a reference model for maize breeding in Huang-Huai-Hai plain under the new climate condition, the study expounded the breeding process, variety characteristics, yield performance and production application of ‘Xundan 658’. In addition, based on the variety’s characteristics of stress resistance, density tolerance and yield stability, the enlightenment on resistance breeding, selection process and breeding goal was discussed.

Key words: ‘Xundan 658’, maize, breeding, stress resistance, density tolerance, yield stability