Welcome to CHINESE JOURNAL OF OIL CROP SCIENCES,

CHINESE JOURNAL OF OIL CROP SCIENCES ›› 2021, Vol. 43 ›› Issue (5): 825-.doi: 10.19802/j.issn.1007-9084.2020105

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Genetic analysis and QTL mapping of soybean leaf shape under rhizobia inoculated environment

  

  1. 1. College of Resources and Environment, Fujian Agriculture and Forestry University/Root Biology Center, Fuzhou 350002, China; 2. Institute of Cereal and Oil Crops, Hebei Academy of Agricultural and Forestry Sciences, National Soybean Improvement Center Shijiazhuang Sub-Center, Huang-huai-hai Key Laboratory of Biology and Genetic Improvement of Soybean, Ministry of Agriculture and Rural Affairs, Laboratory of Crop Genetics and Breeding of Hebei, Shijiazhuang 050035, China; 3. Suihua Institute of Heilongjiang Academy of Agricultural Science, Suihua 152052, China
  • Online:2021-11-01 Published:2021-11-01

Abstract: To determine the genetic basis of soybean leaf shape under the environment with rhizobia inoculation, two soybean varieties with contrast leaf shape and their derived RIL population were used for genetic and QTL analysis under both environment with and without rhizobia inoculation. As results showed that the heritability of leaf shape related traits varied from 0.60 to 0.95 and there also existed interactions between environment and genotype, meanwhile, rhizobia inoculation could significantly affect the correlation coefficients of leaf shape index (LS) with grain number (GN), pod number (PN) and grain weight (GW) per plant. In addition, total 8 QTL with LOD values varied from 2.50~7.03, which could explain 6.4%~16.9% genetic variation, were determined under both environments with and without rhizobia inoculation. Among them, qLS-15 with LOD values varied from 2.50~3.69 could explain the 6.4%~9.3% genetic variation caused by rhizobia * genotype interaction for leaf shape traits, suggesting that qLS-15 is one of the main genetic loci that could interact with the environment. In summary, rhizobia could affect soybean leaf shape through genetic locus of qLS-15, these results provide a theoretical basis for analyzing the mechanism of rhizobia in increasing soybean yield.

Key words: soybean leaf shape, rhizobium, genetic interaction, QTL mapping

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