Role of Plant Genetic Resources in Food Security
2019
v vadez | a amri | m abberton | r j redden | h d upadyaya | s l dwivedi
R J Redden et al., 'Role of Plant Genetic Resources in Food Security', pp.159-188, John Wiley & Sons, 2019
Show more [+] Less [-]Within the last 13 000 yearsmany crop species were domesticated and spread to a rangeof agri-ecological environments, varying by species (Hancock 2012a).There was manualselection for both food and agronomic characteristics, and natural selection for adaptationto new agro-ecological environments. Such selection was affected by available genepools, continuing sources of genetic diversity from wild relatives andmutations, naturalselection pathways fromstabilising to directional, and both allo- and auto-polyploidy, toresult in unique gene pool patterns for each crop (Hancock, 2012b; Cortes et al., 2013).Thedistribution of wheatwas expanded greatlywith the addition of the Aegilops tauschiiD genome to tetraploid durum wheat, thereby enabling hexaploid wheat to adapt to amuch wider agroecological range from the subtropics to high latitudes, and to providea wider diversity of food uses (Hancock, 2012c)
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