Evaluation of sorghum germplasm used in US breeding programmes for sources of sugary disease resistance

28Citations
Citations of this article
29Readers
Mendeley users who have this article in their library.

Abstract

Ergot or sugary disease of sorghum has become an important constraint in North and South American countries that rely on F1 hybrid seeds for high productivity. The objective of this research was to determine the vulnerability of various germplasm sources and publicly bred sorghum lines to sugary disease (Claviceps africana) in the United States. Flower characteristics associated with sugary disease resistance were also studied. A-/B-line pairs, R-lines, putative sources of resistance and their hybrid combinations with an A3 cytoplasmic male-sterile source were evaluated using a disease incidence, severity, and dual-ranking system. Trials were planted in a randomized complete block design with three replications and repeated in at least two planting dates. Planting dates and pedigrees had significant effects on overall ranking for resistance. A-lines were most susceptible to sugary disease. R-lines were more susceptible than B-lines with respect to incidence and severity of the disease. Newer releases of A- and B-lines were more susceptible to sugary disease than older releases. Sugary disease reaction of A-lines was a good indicator of disease reaction of B-lines. Tx2737, a popular R-line, was highly susceptible to sugary disease in spite of being a good pollen shedder because the stigma emerged from glumes 2-3 days before anthesis. The combination of flower characteristics associated with resistance were least exposure time of stigma to inoculum before pollination, rapid stigma drying after pollination, and small stigma. An Ethiopian male-fertile germplasm accession, IS 8525, had good levels of resistance. Its A3 male-sterile hybrid had the highest level of resistance in the male-sterile background, IS 8525 should be exploited in host-plant resistance strategies.

References Powered by Scopus

Drought tolerant sorghum and cotton germplasm

225Citations
N/AReaders
Get full text

Ergot: A new disease threat to Sorghum in the Americas and Australia

132Citations
N/AReaders
Get full text

Claviceps africana sp. nov.; the distinctive ergot pathogen of sorghum in Africa

88Citations
N/AReaders
Get full text

Cited by Powered by Scopus

Sorghum Improvement-Integrating Traditional and New Technology to Produce Improved Genotypes

116Citations
N/AReaders
Get full text

Biology, genetics, and management of ergot (Claviceps spp.) in rye, sorghum, and pearl millet

114Citations
N/AReaders
Get full text

Development and utilization of sorghum as a bioenergy crop

69Citations
N/AReaders
Get full text

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Cite

CITATION STYLE

APA

Dahlberg, J. A., Bandyopadhyay, R., Rooney, W. L., Odvody, G. N., & Madera-Torres, P. (2001). Evaluation of sorghum germplasm used in US breeding programmes for sources of sugary disease resistance. Plant Pathology, 50(6), 681–689. https://doi.org/10.1046/j.1365-3059.2001.00636.x

Readers' Seniority

Tooltip

Researcher 9

50%

PhD / Post grad / Masters / Doc 8

44%

Professor / Associate Prof. 1

6%

Readers' Discipline

Tooltip

Agricultural and Biological Sciences 16

89%

Psychology 1

6%

Earth and Planetary Sciences 1

6%

Save time finding and organizing research with Mendeley

Sign up for free