Phenotypic screening of soybean germplasm suitable for high planting density is currently the most viable strategy to increase yield. Previous studies have shown that soybean varieties with dwarf features and a short petiole often exhibit a compact plant architecture which could improve yield through increased planting density, although previously reported short petiole accessions were ultimately not usable for breeding in practice. Here, we established a method to assess petiole length and identified an elite mutant line, M657, that exhibits high photosynthetic efficiency. The agronomic traits of M657 were evaluated under field conditions, and appeared to be stable for short petiole across seven locations in northern, Huang–Huai, and southern China from 2017 to 2018. Compared with the Jihuang 13 wild type, the mutant M657 was shorter in both petiole length and plant height, exhibited lower total area of leaf, seed weight per plant and 100-seed weight, but had an increased number of effective branches and the growth period was prolonged by 2–7 days. Using M657 as a parental line for crosses with four other elite lines, we obtained four lines with desirable plant architecture and yield traits, thus demonstrating the feasibility of adopting M657 in breeding programs for soybean cultivars of high density and high yield.

GAO Hua-wei;SUN Ru-jian;YANG Meng-yuan;YAN Long;HU Xian-zhong;FU Guang-hui;HONG Hui-long;GUO Bing-fu;ZHANG Xiang;LIU Li-ke;ZHANG Shu-zhen;QIU Li-juan

Key Laboratory of Soybean Biology,Ministry of Education/College of Agriculture,Northeast Agricultural University,Harbin 150030,P.R.China;National Key Facility for Crop Gene Resources and Genetic Improvement/Institute of Crop Sciences,Chinese Academy of Agricultural Sciences,Beijing 100081,P.R.China;Hulun Buir Institution of Agricultural Sciences,Zhalantun 162650,P.R.China;College of Life Science,Liaocheng University,Liaocheng 252059,P.R.China;Institute of Cereal and Oil Crops,Hebei Academy of Agricultural and Forestry Sciences/Hebei Laboratory of Crop Genetic and Breeding,Shijiazhuang 050035,P.R.China;Suzhou Academy of Agricultural Sciences,Suzhou 234000,P.R.China;Crops Research Institute,Jiangxi Academy of Agricultural Sciences/Nanchang Branch of National Center of Oil Crops Improvement/Jiangxi Province Key Laboratory of Oil Crops Biology,Nanchang 330200,P.R.China

农业科学学报（英文）

[1]GAO Hua-wei;SUN Ru-jian;YANG Meng-yuan;YAN Long;HU Xian-zhong;FU Guang-hui;HONG Hui-long;GUO Bing-fu;ZHANG Xiang;LIU Li-ke;ZHANG Shu-zhen;QIU Li-juan-.Characterization of the petiole length in soybean compact architecture mutant M657 and the breeding of new lines)[J].农业科学学报（英文）,2022(09):2508-2520

M657,Jihuang

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