2018
DOI: 10.1016/j.cropro.2018.02.008
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Plot based heritability estimates and categorization of cassava genotype response to cassava brown streak disease

Abstract: Cassava brown streak disease (CBSD) caused by Cassava brown streak virus (CBSV) and Ugandan cassava brown streak virus (UCBSV) is a threat to food security in sub-Saharan Africa, where the disease persistently reduces overall root quality and quantity resulting in up to 100% yield losses. Complexities in CBSD symptom expression and the damage caused on leaves, stems and roots throughout the 12 months of cassava growth require that appropriate ways of categorizing genotype response and optimal stages of evaluat… Show more

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Cited by 15 publications
(26 citation statements)
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“…On the other hand, the low standard errors associated with the Namulonge dataset are indicative of less skewed distributions of data points arising from the 1–5 scale and/or the size of the sampling units ( number of roots assessed per plot) . This finding qualifies Namulonge as an appropriate site for undertaking CBSD resistance screening, as demonstrated by other studies (Kaweesi et al, 2014; Kawuki et al, 2016; Okul Valentor et al, 2018). Indeed, Namulonge, located in central Uganda, could be considered as a national, regional or international site for screening cassava for CBSD resistance.…”
Section: Discussionsupporting
confidence: 81%
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“…On the other hand, the low standard errors associated with the Namulonge dataset are indicative of less skewed distributions of data points arising from the 1–5 scale and/or the size of the sampling units ( number of roots assessed per plot) . This finding qualifies Namulonge as an appropriate site for undertaking CBSD resistance screening, as demonstrated by other studies (Kaweesi et al, 2014; Kawuki et al, 2016; Okul Valentor et al, 2018). Indeed, Namulonge, located in central Uganda, could be considered as a national, regional or international site for screening cassava for CBSD resistance.…”
Section: Discussionsupporting
confidence: 81%
“…So often, concepts applied for plant disease assessment of foliar parts suffice for roots (Kranz, 1988; Lee and Madden, 1990). However, CBSVs present a unique situation such that upon infection, characteristic CBSD symptoms are manifested on leaves, stems and roots, with consistently poor correlations of disease severities and/or incidences amongst foliar and roots (Hillocks and Jennings, 2003; Kaweesi et al, 2014; Okul Valentor et al, 2018). The starch-bearing roots, which by far are the most economically important part of cassava, are worst hit by CBSD.…”
Section: Discussionmentioning
confidence: 99%
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