000			03264nam a22003497a 4500
001			G94911
003			MX-TxCIM
005			20221114220159.0
008			121211s ||||f| 0 p|p||0|| |
040			_aMX-TxCIM
041			_aeng
090			_aCIS-6289
100	1		_9830 _aJeffers, D.P. _gGlobal Maize Program _8INT1482
245	1	0	_aEvaluation of CIMMYT germplasm for response to aflatoxin production in the Southern USA
260			_c2010. _aPulau Pinang (Malaysia) : _bUniversiti Sains Malaysia ; _bCIMMYT,
300			_a1 page
500			_aAbstract only
520			_aThe demand for safe, nutritious maize free of mycotoxins is important for improving the lives of small holder farmers The International Maize and Wheat Improvement Center (CIMMYT), has developed germplasm more tolerant to abiotic stresses and resistant to biotic stresses, for targeting aflatoxin prone areas especially in Africa. Our objective was to evaluate the response of selected CIMMYT white and yellow corn inbreds and hybrids to aflatoxin contamination in Southern USA, and to determine the genetic variability that exists for resistance to Aspergillus ear rot in CIMMYT germplasm. Twenty five CIMMYT yellow hybrids, twenty five white hybrids, twenty four white inbreds and twenty eight yellow inbreds were evaluated in Texas, Mississippi and Georgia. These inbreds and hybrids were selected based on low levels of Aspergillus flavus ear rot infection under field evaluations using artificial inoculations in Mexico. U.S. evaluations in 2005, were artificially inoculated with Aspergillus flavus two weeks after flowering using the silk channel inoculation method in Starkville, MS and the colonized kernel method in Weslaco, TX. There were significant differences for aflatoxin content in both inbreds and hybrids. White and yellow inbreds were evaluated in Starkville, MS. Average aflatoxin concentration was 608 ng g-1 for white inbreds and 451 ng g-1 for yellow inbreds. White quality protein maize (QPM) inbred CML142 and yellow QPM inbred CLQ-G2507 had aflatoxin levels below the resistant checks, Mp313E and Mp717, respectively. Average aflatoxin concentrations for white hybrids were 148 ng g-1 in Starkville, MS and 17 ng g-1 in Weslaco, TX. Low levels of infection and aflatoxin production were obtained in Weslaco. Several white hybrids (e.g., CML341 x CML254, CML341 x CML495) had lower aflatoxin than the most resistant check. Average aflatoxin concentrations for yellow hybrids were 83 ng g-1 in Starkville, MS and 38 ng g-1 in Weslaco, TX. Yellow hybrids CML-451 x CL-02844 and CL-02450 x CML454 had lower aflatoxin levels than resistant checks in Starkville, MS.
536			_aGlobal Maize Program
546			_aText in English
594			_aINT1482
595			_aCSC
610	2	7	_9978 _aCentro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT)
650		7	_2AGROVOC _91136 _aGermplasm
650		7	_2AGROVOC _95637 _aAflatoxins
651		7	_2AGROVOC _929087 _aUnited States of America
700	1		_aKrakowsky, M. _927884
700	1		_aWilliams, W.P. _97668
700	1		_aBetrán, J. _96537
773			_dPulau Pinang (Malaysia) : Universiti Sains Malaysia : CIMMYT, 2010. _gp. 233 _tInternational mycotoxin conference mycored 2010 _wG94900
942			_cSUM _2ddc
999			_c8095 _d8095