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Related Experiment Video

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A Simple Method for Isolation of Soybean Protoplasts and Application to Transient Gene Expression Analyses
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Quantitative trait locus mapping of soybean maturity gene E5.

Auchithya Dissanayaka1, Tito O Rodriguez1, Shaokang Di1

  • 1Graduate School of Life and Environmental Sciences, University of Tsukuba , 2-1-18 Kannondai, Tsukuba, Ibaraki 305-8518 , Japan.

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|July 21, 2016
PubMed
Summary

Mapping the soybean E5 locus for flowering and maturity proved challenging. This study suggests a unique E5 gene may not exist, with observed traits potentially linked to the E2 allele.

Keywords:
E5 geneQTL mappingmaturity genesoybean

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Area of Science:

  • Plant Genetics
  • Soybean Breeding
  • Quantitative Trait Locus Analysis

Background:

  • Soybean flowering and maturity are complex traits controlled by multiple genetic loci, including E1-E5 and E7-E9.
  • Most known loci have been mapped to molecular linkage groups (MLGs), but the E5 locus remained unassigned.

Purpose of the Study:

  • To map the E5 locus controlling soybean flowering and maturity using F2 populations.
  • To identify quantitative trait loci (QTLs) associated with days to flowering (DF) and days to maturity (DM).

Main Methods:

  • Generation and analysis of multiple F2 soybean populations derived from crosses involving parents with differing flowering/maturity genes.
  • Quantitative Trait Locus (QTL) analysis was performed on DF and DM traits within these populations.

Main Results:

  • QTLs for DF and DM were inconsistently located across different F2 populations.
  • No consistent QTLs were identified that could be definitively assigned as the E5 locus.
  • The E2-dl allele in the Harosoy-E5 parent might be responsible for late flowering/maturity, potentially due to outcrossing.

Conclusions:

  • The existence of a unique E5 gene controlling soybean flowering and maturity is questionable.
  • Observed late flowering and maturity in certain soybean lines may be attributable to alleles at other loci, such as E2.