Dear Dr. Kurian Sir,

Please follow these links and pdf attachments for said query.

http://www.pnas.org/content/108/17/7096.full

http://www.sciencedirect.com/science/article/pii/S2468265916300087

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4071525/

http://www.sciencedirect.com/science/article/pii/S2214662814000103

Good Luck

Hello

Among plants, recently formed allopolyploid hybrids typify many weed species. Thus, invasion potential in plants might be somewhat predictable given that spontaneous hybridization. Polyploid hybrids in plants tend to have greater fitness than do diploid hybrids, possibly because of increased heterozygosity and reduced inbreeding depression. Also much genetic variation could arise from multiple origins of polyploidy within allopolyploid ‘species’, and the prevalence of genomic rearrangements.

Please following these papers

http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.456.6515&rep=rep1&type=pdf

Article Adaptive evolution in invasive species

Best wishes