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Characterization of new polymorphic functional markers for sugarcane.

K M Oliveira¹, L R Pinto, T G Marconi

¹Centro de Biologia Molecular e Engenharia Genetica (CBMEG) - Universidade Estadual de Campinas (UNICAMP), Departamento de Genetica e Evolucao, Instituto de Biologia, Cidade Universitaria Zeferino Vaz, CP 6010, CEP 13083-875, Campinas-SP, Brasil.

|February 24, 2009

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Researchers developed expressed sequence tag-simple sequence repeat (EST-SSR) markers from sugarcane. These markers effectively identified genetic diversity and polymorphisms across 18 sugarcane varieties, aiding in genetic analysis and resource exploitation.

Area of Science:

Genomics
Molecular Biology
Plant Science

Background:

Expressed sequence tags (ESTs) provide conserved sequence motifs for developing simple sequence repeat (SSR) markers.
Sugarcane genetic resources require efficient tools for analysis and exploitation.

Purpose of the Study:

To develop and assess the utility of EST-derived SSR markers for sugarcane genetic analysis.
To identify polymorphic markers for discriminating sugarcane varieties and understanding genetic diversity.

Main Methods:

Searched the Sugarcane Expressed Sequence Tag database for SSRs.
Designed 342 EST-SSR markers from non-redundant SSR-containing ESTs.
Screened 18 sugarcane varieties using the developed EST-SSR markers.

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Main Results:

65.5% of tested EST-SSRs detected polymorphism with expected fragment sizes.
Markers revealed an average of 7.55 alleles per locus, with high polymorphism information content (average 0.73).
82.1% of tested EST-SSRs were functional, showing homology to known genes.

Conclusions:

EST-SSR markers are valuable tools for sugarcane genetic mapping, QTL identification, and comparative genomics.
These markers enhance the exploitation of sugarcane genetic resources and provide insights into functional diversity.
The developed markers offer a direct estimate of functional diversity in sugarcane and related species.