Restriction mapping of Cucurbitae pepo L. chloroplast DNA Pstl 9.8 kb fragment and detection of ORF 2280 transcripts

Abstract

Using tomato heterologous probe, the ORF 2280 was located on the PstI 9.8 kb fragment in the inverted repeat A (IRA) and on the PstI 12.1 kb fragment in the inverted repeat B (IRB) on the physical map of squash chloroplast DNA. A fine map of the PstI 9.8 kb fragment was developed using SalI, BamHI and EcoRI restriction enzymes.Two transcripts of 1.4and 2.6 kbs of ORF 2280 of squash plastid DNA were detected in fruits but not in the leaves of Early Prolific cultivar using a heterologous PstI 1.2 kb tomato plastid DNA probe internal to ORF 2280.In Bicolor gourd fruits, 1.4 and 2.6 kb transcripts of ORF 2280 weredetected both in the fruits and in leaves.

Key Words: Cucurbitae pepo, restriction mapping, PstI 9.8 kb fragment, ORF 2280 transcripts.

African Journal of Biotechnology Vol.4(1) 2005: 1-8