Evaluation of CIMMYT germplasm for response to aflatoxin production in the Southern USA
Material type:
TextLanguage: English Publication details: 2010. Pulau Pinang (Malaysia) : Universiti Sains Malaysia ; CIMMYT,Description: 1 pageSubject(s):
In:
International mycotoxin conference mycored 2010 p. 233Summary: The 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.
| Item type | Current library | Collection | Call number | Status | Date due | Barcode | Item holds | |
|---|---|---|---|---|---|---|---|---|
| Abstract or summary | CIMMYT Knowledge Center: John Woolston Library | CIMMYT Staff Publications Collection | CIS-6289 (Browse shelf(Opens below)) | Available |
Abstract only
The 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.
Global Maize Program
Text in English
INT1482
CIMMYT Staff Publications Collection
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