Sugarcane Breeding and Supporting Genetics Research in Ecuador

Castillo, Raul O.; Cifuentes, Edison Silva

doi:10.1007/s12355-021-01057-4

Cited by 2 publications

(1 citation statement)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…NS = Non-Significant; significant at *P < 0.05, **P < 0.01, ***P < 0.001 according to a t-test as described in material and method (multi-series analysis within location) since the very first non-replicated stage is expected to be reasonably effective as long as exposure to the disease is adequate. Such a method is already being used in breeding programs in Ecuador, Brazil and Guatemala (Castillo and Silva 2022;Cursi et al 2022;Orozco and Queme 2022). Providing favorable epidemiological conditions, assessment of variety resistance in naturally infected field trials appears a convenient and reliable alternative to artificial inoculation techniques for screening of large populations (Sood et al 2009;Chapola et al 2016).…”

Section: Discussionmentioning

confidence: 99%

Effects of orange rust on sugarcane yield traits in a multi-environment breeding program

Dijoux

Dumont²,

Paysan³

et al. 2023

Euphytica

View full text Add to dashboard Cite

Orange rust caused by Puccinia kuehnii is a major emerging disease in many sugarcane-producing countries. Breeding for resistant varieties is the main strategy for controlling orange rust. The rapid spread of this disease in recently contaminated sugarcane industries offers the opportunity to use on-going breeding trials to investigate the effect of orange rust on yield traits and gauge levels of resistance required to minimize losses. Orange rust was first observed in 2018 in Reunion. This study reports the effects of the disease on cane yield (CY), recoverable sugar (RS), fiber content (FIB) and economic index (EI) in five environments of Reunion’s sugarcane breeding program located in diverse agro-climatic zones. Disease resistance assessed under natural infection had high broad-sense heritability (0.76–0.91) in multi-environment analyses. Mean infection levels differed between locations congruently with location differences for two influential climatic parameters (humidity and temperature). Maximum potential yield losses ($${YL}_{max}$$ YL max ) associated with orange rust were estimated using regression analyses of yield traits versus disease susceptibility. $${YL}_{max}$$ YL max for CY and EI varied between environments and reached up to 26.0% and 24.2% respectively, in one of the most humid environments. RS was either unaffected or only slightly increased by the disease. In contrast, FIB was always reduced by the disease ($${YL}_{max}$$ YL max ≤6.5%). Multi-environment analyses of yield traits of varieties common to all five environments gave insights into the impact of orange rust on the yielding ability of these varieties across all environments. All these data provide food for thoughts to efficient breeding strategies for varietal resistance to orange rust.

show abstract