Distribution and frequency of Bru1, a major brown rust resistance gene, in the sugarcane world collection. (16th July 2017)

• Record Type: Journal Article
• Authors: Parco, Arnold S.; Hale, Anna L.; Avellaneda, Mavir C.; Hoy, Jeffrey W.; Kimbeng, Collins A.; Pontif, Michael J.; McCord, Per H.; Ayala‐Silva, Tomas; Todd, James R.; Baisakh, Niranjan
• Editors: Jenkins, J.
• Is Part Of: Plant breeding. Volume 136:Number 5(2017)
• Page Start: 637
• Page End: 651
• Publication Date: 2017-07-16
• Subjects: brown rust -- Bru1 -- marker‐assisted breeding -- sugarcane -- world collection; Plant breeding -- Periodicals; 631.52
• DOI: 10.1111/pbr.12508
• Languages: English
• ISSNs: 0179-9541

Abstract

Abstract: Brown rust, caused by Puccinia melanocephala, is an important disease of sugarcane worldwide. Molecular markers for a major brown rust resistance gene, Bru 1, were used to screen a total of 1, 282 clones in the World Collection of Sugarcane and Related Grasses (WCSRG) to determine the distribution and frequency of the gene in Saccharum species and related genera. Bru 1 was found across all species within the Saccharum complex, but the frequency varied among species. Bru 1 was more prevalent in S. robustum clones (59.1%), whereas it occurred in low frequency and exhibited the highest level of variability as determined by the presence of one or both markers (18.8%) in clones of S. spontaneum . Bru 1 frequency was highest in the two secondary cultivated species, S. barberi (79.3%) and S. sinense (71.8%). The frequency of Bru 1 was 26.4% and 21.0% in S. officinarum and interspecific hybrid clones, respectively. Knowledge of the distribution and frequency of Bru 1 in the WCSRG will complement efforts to characterize diversity in the Saccharum complex for the expected expanded use of marker‐assisted selection in the future.