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Bandara Gajanayake, K. Raja Reddy, Mark W. Shankle, and Ramon A. Arancibia

early season (first 20 d) has a direct and significant impact on storage root initiation and thus final yield. Sweetpotato is grown as a rain-fed crop in Mississippi and subjected to fluctuating soil moisture conditions in the field. Sweetpotato is also

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Victor N. Njiti, Qun Xia, Leonna S. Tyler, Lakeisha D. Stewart, Antione T. Tenner, Chunquan Zhang, Dovi Alipoe, Franklin Chukwuma, and Ming Gao

vegetative and reproductive sinks ( Hicklenton, 1990 ; Williams, 1988 ). Manipulation of sinks capacity may enhance sweetpotato yield through assimilates repartitioning. The sweetpotato is a storage root and a major carbohydrate sink. Suppressing the growth

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Arthur Villordon, Jeffrey C. Gregorie, and Don LaBonte

) first suggested the link between lateral root (LR) development and storage root formation. Growing conditions during the transition from primary to secondary growth directly influence the onset of storage root formation, which is marked by the appearance

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Fekadu Gurmu, Shimelis Hussein, and Mark Laing

among the five most important food crops in more than 50 of those countries ( Andrade et al., 2009 ). It is one of the most widely grown storage root crops in sub-Saharan Africa (SSA). Sweetpotato is one of the food security crops in Ethiopia grown by

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Arthur Villordon and Jeffrey C. Gregorie

hypothesis that B interacts with the uptake of other mineral nutrients (reviewed in Bariya et al., 2014 ; Fageria, 2001 ). In sweetpotato ( Ipomoea batatas ), B has been associated with storage root disorders such as splitting ( Byju et al., 2007 ) and

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Julio Solis, Arthur Villordon, Niranjan Baisakh, Don LaBonte, and Nurit Firon

). These studies collectively demonstrate that abiotic cues result in transcriptional changes in sweetpotato. However, gene expression under stress has not been studied in early stages of storage root development, before thickening of roots. Sweetpotato SRs

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Arthur Villordon, Don LaBonte, Julio Solis, and Nurit Firon

Koshimizu and Nishida (1949) measured LR branching in sweetpotatoes and postulated that LR branching may be very important “to supply the internal growth elements” for storage root formation. Pardales and Yamauchi (2003) studied sweetpotato LR

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Arthur Villordon, Julio Solis, Don LaBonte, and Christopher Clark

; Somasundaram and Mithra, 2008 ). Such models represent an important step in further understanding the complex interactive nature of management and agroclimatic variables on sweetpotato storage root yield variability. These phenology-driven models specified that

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Megan J. Bowman, David K. Willis, and Philipp W. Simon

carotenoid consumption in the U.S. diet as carrots ( Simon et al., 2009 ). Despite its importance, the molecular regulation of carotenoid accumulation in the storage root of carrot has not been extensively researched. The genetic basis of carotenoid

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Arthur Villordon and Christopher Clark

germplasm by determining the incidence of galls and egg masses following standardized inoculation of plants in greenhouse evaluations ( Cervantes-Flores et al., 2002 ). While RKN effects on storage root yield have been demonstrated in field plots ( Dukes et