DNA sequencing of peanuts done
Q. What is a tetraploid?- Published on 24 Feb 16a. Plant carrying two separate genomes
b. Crop carrying two kinds of genome
c. Crop carrying one kind of genomes
d. Both a and b
ANSWER: Both a and b
Peanut was a result of hybridisation between two wild species and the hybrid was cultivated by ancient South American inhabitants. As ancestors were 2 different species, peanut is a tetraploid which means it carries A and B sub genomes or 2 separate genomes. Comparison of DNA sequence of wild species and cultivated peanut shows exactly the same sequencing which is 99.96% identical. IPGI is a multi national group of crop geneticists working with 39 scientists from 26 organisations in 6 countries including ICRISAT. New peanut genome will also help farmers to tackle climate change better. Peanut (Arachis hypogaea), is an important crop both commercially as well as nutritionally and around 25.7 million hectares of peanut is tended each year, producing about 42 million metric tons. Mapping the genome structure also required sequencing of two ancestral parents, because together they represent the cultivated peanut. The sequences provide researchers access to 96 percent of all peanut genes in their genomic context. ICRISAT is currently a member of the Peanut Genome Consortium.
