Pankaj ji A slight correction. Every plant has N (gametic) and 2N (sporophytic) chromosomes. Every plant has basic number X, usually same for a genus. A diploid would have 2N=2X, whereas a polyploid would have 2N=4X (tetraploid), 6X (hexaploid), 8X (octaploid), etc. Plant is known as polyploid and phenomenon as polyploidy.
-- Dr. Gurcharan Singh Retired Associate Professor SGTB Khalsa College, University of Delhi, Delhi-110007 Res: 932 Anand Kunj, Vikas Puri, New Delhi-110018. Phone: 011-25518297 Mob: 9810359089 http://people.du.ac.in/~singhg45/ On Sat, Sep 25, 2010 at 6:59 AM, Pankaj Kumar <[email protected]>wrote: > Usually the chromosoe number is 2n or diploid, when an organism has > more than two sets of chromosomes then they are called polyploid and > the phenomena is called Polyploidy. > It is not a very uncommon phenomena in plants. Highest polyploidy is > found in ferns. Orchidaceae is supposed to be one group with high > polyploidy too. > Regards > Pankaj > > > > On Sat, Sep 25, 2010 at 7:17 PM, promila chaturvedi > <[email protected]> wrote: > > Dear All, > > I want to know what is Polyploid and Polyploidy. This is usuall occurance > in > > Passifloras, but can bein other plants as well. > > Promia > > > > -- > *********************************************** > "TAXONOMISTS GETTING EXTINCT AND SPECIES DATA DEFICIENT !!" > > > Pankaj Kumar Ph.D. (Orchidaceae) > Research Associate > Greater Kailash Sacred Landscape Project > Department of Habitat Ecology > Wildlife Institute of India > Post Box # 18 > Dehradun - 248001, India >
