%0 Book Section
%A Redden, R J
%A Upadyaya, H D
%A Dwivedi, S L
%A Vadez, V
%A Abberton, M
%A Amri, A
%B Food Security and Climate Change
%D 2019
%E Yadav, S S
%E Redden, R J
%E Hatfield, J L
%E Ebert, A W
%F icrisat:11181
%I John Wiley & Sons
%K Plant Genetic Resources, Food Security, Climate Change, Agriculture, Crop Genetic Diversity,  ICARDA, IITA, ICRISAT, Genebanks, Abiotic Stress, CropWild Relatives, Biotic stress, Chickpea,  Groundnut, Pigeonpea, Pearl millet, Sorghum, Finger millet, Drought Tolerance
%P 159-188
%T Role of Plant Genetic Resources in Food Security
%U http://oar.icrisat.org/11181/
%X Within the last 13 000 yearsmany crop species were domesticated and spread to a range  of agri-ecological environments, varying by species (Hancock 2012a).There was manual  selection for both food and agronomic characteristics, and natural selection for adaptation  to new agro-ecological environments. Such selection was affected by available gene  pools, continuing sources of genetic diversity from wild relatives andmutations, natural  selection pathways fromstabilising to directional, and both allo- and auto-polyploidy, to  result in unique gene pool patterns for each crop (Hancock, 2012b; Cortes et al., 2013).  Thedistribution of wheatwas expanded greatlywith the addition of the Aegilops tauschii  D genome to tetraploid durum wheat, thereby enabling hexaploid wheat to adapt to a  much wider agroecological range from the subtropics to high latitudes, and to provide  a wider diversity of food uses (Hancock, 2012c)...