000 03137nab a22003497a 4500
001 G89762
003 MX-TxCIM
005 20240919021147.0
008 210820s2007 xxk|||p|op||| 00| 0 eng d
022 _a0021-8596
022 _a1469-5146 (Online)
024 8 _ahttps://doi.org/10.1017/S0021859606006575
040 _aMX-TxCIM
041 0 _aeng
090 _aCIS-4969
100 1 _aNassar, N.M.A.
_9620
245 1 0 _aCassava improvement :
_bchallenges and impacts
260 _aUnited Kingdom :
_bCambridge University Press,
_c2007.
340 _aComputer File|Printed
500 _aPeer review
520 _aCassava (Manihot esculenta Crantz) is one of the two most important food crops in sub-Saharan Africa. This area accounts for most of the root harvest worldwide, followed by Asia and Latin America – the centre of origin for Manihot species. In Africa and Latin America, cassava is mostly used for human consumption, while in Asia and parts of Latin America it is also used commercially for the production of animal feed and starch-based products. Cassava is regarded as a crop adapted to drought-prone environments, where cereals and other crops do not thrive, and it also grows well in poor soil. There are about 100 wild Manihot species, which provide an important genetic endowment for cassava breeding. Professional cassava breeding started in the 20th century and was spurred on by increasing population demands. The main breeding goals are high yield per unit area, particularly in marginal or pest-prone environments. The most notable results from cassava breeding are seen today in sub-Saharan Africa, where it has been transformed from a poor man's crop to an urban food, and in Southeast Asia, where it has changed from a subsistence crop to an industrial cash crop. Long-term research by many international and national partners has led to breeding high-yielding cassava cultivars that increased crop yields up to 40%. Manipulation of genes from wild species has led to new cultivars that resist prevailing diseases and pests, allowing the avoidance of large-scale famine in sub-Saharan Africa. Cassava improvement continues to tap genetic variation through conventional breeding (including the use of wild species) and biotechnology, because many pathogens still take their toll and occasionally epidemics affect farmer fields significantly. However, new sources of variation are needed to genetically enhance the nutritional quality of this important food crop in Africa and other areas in the tropics of the developing world.
546 _aText in English
650 7 _2AGROVOC
_94380
_aCassava
650 7 _aPlant breeding
_gAGROVOC
_2
_91203
650 7 _2AGROVOC
_98252
_aCash crops
650 7 _aHigh-yielding varieties
_gAGROVOC
_2
_91147
650 7 _2AGROVOC
_92232
_aGenetic improvement
700 1 _aOrtiz, R.
_9244
773 0 _tJournal of Agricultural Science, Cambridge
_n634617
_gv. 145, no. 2, p. 163-171
_dUnited Kingdom : Cambridge University Press, 2007.
_wG444500
_x0021-8596
856 4 _yAccess only for CIMMYT Staff
_uhttps://hdl.handle.net/20.500.12665/1077
942 _cJA
_2ddc
_n0
999 _c26613
_d26613