I imagine if it was a correction of addition. Anyways, just a querry...So you mean to say a plant with 3x chromosome is not a polyploid? Pankaj
On Sat, Sep 25, 2010 at 9:30 PM, Gurcharan Singh <[email protected]> wrote: > 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 > > > > > -- *********************************************** "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
