Mendoza-Onofre, L. E. and Hernández-Martínez, M. and Cárdenas-Soriano, E. and et al, .
(2006)
Cold-Tolerant Sorghum Germplasm As A Potential Source To Ergot (Claviceps Africana Frederickson, Mantle & De Milliano) Tolerance.
Agrociencia, 40.
pp. 593-603.
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Abstract
At the Colegio de Postgraduados, in México, cold-tolerant parental
lines of sorghum hybrids (Sorghum bicolor L. Moench) have been
developed. These lines are adapted to regions located at an altitude
of 2200 m, and when they are sown at lower altitudes, they
present early flowering and high pollen fertility. These two
characteristics could help to reduce the damage caused by the
Claviceps africana Frederickson, Mantle & de Milliano fungus,
responsible of the ergot, cornezuelo, or sugary disease. In Celaya,
Guanajuato, México (1560 m altitude), an experiment was
established in order to evaluate days to flower, panicle length,
flowering period, number of tillers, and seed yield, (seed number
and size) of three male-sterile A lines, inoculated with the pathogen
at flowering, and pollinated at different times. An incomplete
block design with split plots treatments arrangement with four
replications, was used. The treatments in main plots were the
lines (A LIVA X -cold-tolerant-, ATx 630, and ATx 631), and in
the split plots, seven times of pollination (one row per time).
Before flowering, the main panicle of 10 fully competitive plants
per row was covered. At the flowering onset, the panicles were
uncovered and sprayed with 5 mL of a 1×104 conidia mL−1,
suspension, and covered again....
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