Genome Duplication in Soybean (Glycine Subgenus Soja)

AUTOR(ES)

Shoemaker, R. C.

RESUMO

Restriction fragment length polymorphism mapping data from nine populations (Glycine max X G. soja and G. max X G. max) of the Glycine subgenus soja genome led to the identification of many duplicated segments of the genome. Linkage groups contained up to 33 markers that were duplicated on other linkage groups. The size of homoeologous regions ranged from 1.5 to 106.4 cM, with an average size of 45.3 cM. We observed segments in the soybean genome that were present in as many as six copies with an average of 2.55 duplications per segment. The presence of nested duplications suggests that at least one of the original genomes may have undergone an additional round of tetraploidization. Tetraploidization, along with large internal duplications, accounts for the highly duplicated nature of the genome of the subgenus. Quantitative trait loci for seed protein and oil showed correspondence across homoeologous regions, suggesting that the genes or gene families contributing to seed composition have retained similar functions throughout the evolution of the chromosomes.

Documentos Relacionados

• Conidia aerobiology and cercosporiosis management of soybean (Glycine max)
• Prospection of antimicrobial peptides from soybean (Glycine max) using proteomics tools
• Breeding (Glycine max (L.) Merrill) for low linolenic acid content in soybean
• Biochemical characterization of the soybean (Glycine max) aldehyde dehydrogenase GmTP55
• Translocation of Sulfate in Soybean (Glycine max L. Merr) 1