000			03090nab a22003617a 4500
001			G95196
003			MX-TxCIM
005			20230717172619.0
008			121211s2011 us |||p op | 0eng d
022	0		_a0027-8424
022	0		_21091-6490 (Online)
024	8		_ahttps://doi.org/10.1073/pnas.1103373108
040			_aMX-TxCIM
041			_aeng
090			_aCIS-6352
100	1		_95290 _aBellon, M.R.
245	1	0	_aAssessing the vulnerability of traditional maize seed systems in Mexico to climate change
260			_aWashington, DC (USA) : _bNational Academy of Sciences, _c2011.
500			_aPeer review
520			_aClimate change is predicted to have major impacts on small-scale farmers in Mexico whose livelihoods depend on rain-fed maize. We examined the capacity of traditional maize seed systems to provide these farmers with appropriate genetic material under predicted agro-ecological conditions associated with climate change. We studied the structure and spatial scope of seed systems of 20 communities in four transects across an altitudinal gradient from 10?2,980 m above sea level in five states of eastern Mexico. Results indicate that 90% of all of the seed lots are obtained within 10 km of a community and 87% within an altitudinal range of ±50 m but with variation across four agro-climate environments: wet lowland, dry lowland, wet upper midlatitude, and highlands. Climate models suggest a drying and warming trend for the entire study area during the main maize season, leading to substantial shifts in the spatial distribution patterns of agro-climate environments. For all communities except those in the highlands, predicted future maize environments already are represented within the 10-km radial zones, indicating that in the future farmers will have easy access to adapted planting material. Farmers in the highlands are the most vulnerable and probably will need to acquire seed from outside their traditional geographical ranges. This change in seed sources probably will entail important information costs and the development of new seed and associated social networks, including improved linkages between traditional and formal seed systems and more effective and efficient seed-supply chains. The study has implications for analogous areas elsewhere in Mexico and around the world
526			_aMCRP _bFP1
546			_aText in English
650		7	_aAdaptation _2AGROVOC _96026
650		7	_aLandraces _96305 _2AGROVOC
650		7	_aFood security _2AGROVOC _91118
650		7	_aGenetic resources _2AGROVOC _91127
650		7	_95511 _aClimate change adaptation _2AGROVOC
700	1		_aHodson, D.P. _gSocioeconomics Program _gSustainable Agrifood Systems _8INT2550 _9843
700	1		_9852 _aHellin, J. J. _gFormerly Socioeconomics Program _8INT2698
773	0		_tProceedings of the Natural Academy of Sciences (PNAS) _gv. 108, no. 33, p. 13432-13437 _dWashington, DC (USA) : National Academy of Sciences, 2011. _wu444908 _x1091-6490
856	4		_yAccess only for CIMMYT Staff _uhttps://hdl.handle.net/20.500.12665/1225
942			_cJA _2ddc _n0
999			_c28486 _d28486