Genetic variation in cassava for postharvest physiological deterioration

Tumuhimbise, Robooni; Melis, Rob; Shanahan, Paul

doi:10.1080/03650340.2014.995641

Cited by 22 publications

(25 citation statements)

References 15 publications

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“…The soil variation observed justified the effects of blocks on the performance of most traits, showing the importance of conducting and blocking genotype trials across various environments for selecting genotypes presenting general and/or specific adaptation to those environments. The findings on G × E interaction agreed with the findings of Tumuhimbise et al (2015) showing that G × E interaction analysis is important for identifying genotypes with adequate adaptation to target environments.…”

Section: Resultssupporting

confidence: 82%

Agronomic performance of pro vitamin a cassava varieties in three locations in Nigeria

Adetoro¹,

Ogunbayo²,

Akinwale³

2018

Afr. J. Plant Sci.

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In an early yellow root cassava study in 2003 to 2004, we investigated agronomic performance of pro Vitamin A (yellow fleshed) cassava genotypes in three locations in Nigeria (Ibadan, Mokwa, and Onne). Twenty-two clones and three checks were evaluated. A randomized complete block design was used with four replications. Characteristics showing significant differences among genotypes across all locations included sprouting, vigor, harvest index, root size, storage root yield, dry matter content and fiber content. Plant height, root mealiness and taste were different in only selected locations. Six clones showed stable performance across locations including IITA TMS I011413, IITA TMS I011442, IITA TMS I011663, IITA TMS I982132, IITA TMS I011277 and IITA TMS I011235. Clones IITA TMS I940330 showed the highest dry matter content of 38%. All clones exhibited good resistant to cassava mosaic disease, cassava bacterial blight, cassava green mite, and cassava anthracnose disease. These genotypes ranged in total carotenoid content from 3.4 to 8.2 µg/g fresh weight. In terms of yield, the best clones were IITA TMS I011368 (26 t/ha), IITA TMS I011663 (22 t/ha) and IITA TMS I982132 (25 t/ha). For gari yield clone IITA, TMS I011649 gave 25%, IITA TMS I940330 gave 23%, and IITA TMS I9001554 gave 23%. They were better than the best check IITA TMS I30572, with 22% gari yield. This study showed the potential for biofortification of cassava as a valid strategy to approach the problem of micronutritient deficiencies of the population in the region where cassava is a staple food.

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Section: Resultssupporting

confidence: 82%

Agronomic performance of pro vitamin a cassava varieties in three locations in Nigeria

Adetoro¹,

Ogunbayo²,

Akinwale³

2018

Afr. J. Plant Sci.

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“…This trend also occurred for the harvest times, in that roots harvested at 360 and 420 days resulted in slices with higher visually observed PPD symptoms than those harvested at 300 days (Figure b). Tumuhimbise, Melis, and Shanahan (), evaluating 12 contrasting cassava genotypes for tolerance of root slices to PPD, also observed a trend of increasing symptoms with increasing harvest time. Interestingly, in our study, all averages up to 15 days were above grade 3 (Figure a, b), which is the limit of commercial acceptance according to Coelho et al ().…”

Section: Resultsmentioning

confidence: 89%

Association of preharvest management with oxidative protection and enzymatic browning in minimally processed cassava

et al. 2019

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The aim of this study was to examine oxidative protection and enzymatic browning in the storage of minimally processed cassava and their relationship with population density and harvest age. Population densities were 1.0, 1.25, 1.5, and 1.75 plants m−2. After being harvested at 300, 360, or 420 days after planting, cassava were minimally processed and stored at 5 ± 2°C. It was observed that superoxide dismutase (SOD), catalase (CAT), and peroxidase (POD) play key roles in the tolerance of young roots to browning. Planting density, however, does not appear to be a key factor modulating the activity of the enzymes studied. Practical applications Younger harvested cassava roots, harvested at 300 days, are more tolerant to enzymatic browning. This appears to be in part due to enzymatic activity modulation of the SOD, CAT, and POD enzymes. In addition, it has been demonstrated that agronomic techniques aimed at increasing productivity, such as increasing the planting density of cassava, do not alter the biomarkers of postharvest quality. In summary, evidence that field management may be an efficient approach to improving the conservation of minimally processed cassava is provided. We believe that the findings of this paper will be of great interest regarding the influence of field management on the postharvest quality of freshly cut cassava and will also provide applicable results relating to its production chain.

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“…This indicated a considerable genetic variation among generated progenies as well as their parents. The wide genetic variability in cassava has been reported by many scientists . This implies that hybridization and selection for important traits in cassava can contribute to good progress in generating improved cultivars.…”

Section: Discussionmentioning

confidence: 99%

Genetic inheritance of pulp colour and selected traits of cassava (Manihot esculenta Crantz) at early generation selection

et al. 2018

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The 15 F1 families exhibited essential genetic diversity for cassava improvement. The expression of most cassava traits was controlled by both additive and non-additive gene action. The study elucidated the role of dominance effects over the additive effects for the evaluated traits. However, the pulp colour was predominantly controlled by additive gene action. This implies the possibility of improving cassava through conventional breeding using recurrent selection for most traits. © 2017 Society of Chemical Industry.

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Genetic variation in cassava for postharvest physiological deterioration

Cited by 22 publications

References 15 publications

Agronomic performance of pro vitamin a cassava varieties in three locations in Nigeria

Agronomic performance of pro vitamin a cassava varieties in three locations in Nigeria

Association of preharvest management with oxidative protection and enzymatic browning in minimally processed cassava

Genetic inheritance of pulp colour and selected traits of cassava (Manihot esculenta Crantz) at early generation selection

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