Developement of a new soybean variety 'Keshan No.1' by using space-induced mutation

To innovate soybean varieties and explore breeding techniques, the sexual F₂ generation of space mutation was used in this study, pedigree breeding method was applied to develop a new soybean variety 'Keshan No.1'. The oil content of the variety was 21.82%, the protein content was 38.04%, the average yield was 2629.5 kg · hm^-2 in early group of the national region testing during 2007-2008, the yield of Keshan No.1 was 11.4%; higher than that of the control (HeiheNo.18), the average yield was 2643.8 kg · hm^-2 in production testing, the yield of Keshan No.1 was 6.9% higher than that of the control (HeiheNo.43), it ranked the first place. Using shukla stability variance analysis, the yield of Keshan No.1 was stable, Keshan No.1 was approved by the National Crop Examination Committee (National examination : 2009002) in 2009, the prominent characteristics of this variety are early-maturity, good-quality, high-yield, good yield-stability and wide-adaptability, Keshan No.1 is suitable for planting in the northern part of Heilongjiang Province, the eastern mountain areas of Jilin Province, the northern part of Xinjiang and the central areas and southern areas of Inner Mongolia Hulunbeier in spring season. (authors)