A simple ethanol wash of the tissue homogenates recovers high-quality genomic DNA from Corchorus species characterized by highly acidic and proteinaceous mucilages 

Avijit Kundu¹ · Debabrata Sarkar*¹ · Amit Bhattacharjee¹ · Niladri Topdar¹ · Mohit Kumar Sinha² · Bikash Sinha Mahapatra²

¹ Biotechnology Unit, Division of Crop Improvement, Central Research Institute for Juteand Allied Fibres (CRIJAF), Barrackpore, Kolkata, West Bengal, India
² Central Research Institute for Jute and Allied Fibres (CRIJAF), Barrackpore, Kolkata, West Bengal, India

*Corresponding author: d.sarkar@excite.com

Financial support: Indian Council of Agricultural Research (ICAR), New Delhi and Department of Agricultural Research and Education (DARE), Government of India.

Keywords: Corchorus, DNA extraction, microsatellite, mucilage, PCR, restriction digestion.

A simple miniprep based on early elimination of highly acidic and proteinaceous mucilages through ethanol washing of the tissue homogenates has been developed for the extraction of genomic DNA from mature leaves and seeds of Corchorus spp. As compared to high cetyltrimethylammonium bromide (CTAB)-NaCl DNA extraction followed by ethanol-based removal of remnant mucilages from the DNA pellet, this simple miniprep consistently and reproducibly recovers high amounts of DNA with good spectral qualities at A₂₆₀/A₂₈₀ and A₂₆₀/A₂₃₀. The purified DNA is efficiently digested by restriction endonucleases, and is suitable for PCR amplification of nuclear microsatellites with expected allele sizes.