Abstract
AbstractIncreased sweetpotato utilization has become an important breeding objective recently, with much emphasis on the development of non-sweet sweetpotatoes for income and food security in Ghana. The objective of this study was to evaluate 26 elite non-sweet and less sweet sweetpotato genotypes with regard to their release as commercial varieties using mother–baby trial. The 26 sweetpotato genotypes were tested multilocational on-farm across five ecozones from 2016 to 2017. These genotypes were selected from accelerated breeding scheme carried out from 2010 to 2013. There were no year-by-ecozone-by-genotype and year-by-ecozone interactions. However, ecozone-by-genotype interaction was significant for storage root dry matter, beta-carotene, iron and zinc content. This implies that the relative performance of the genotypes for storage root yield was stable across locations and years. Genotypic differences were found for all the traits and indicated that selection of superior genotypes across ecozone was possible. Storage root yield ranged from 7 t/ha to 39 t/ha, while dry matter content ranged from 34% to 46%. The storage root cooking quality preference was comparable with farmers’ check. Ten superior genotypes were identified for release as commercial varieties based on their staple-preferred taste, higher storage root yield, higher dry matter content, earliness, resistance to the sweetpotato virus, sweetpotato weevil andAlcidodes.
Highlights
Sweetpotato (Ipomoea batatas L. (Lam)) belongs to the botanical family Convolvulaceae (Thottappilly 2009) and its among the few crop plants of major economic importance in the family use for food globally (Eich 2008), which may be due to the Agrobacterium infection which occurred in its evolution (Kyndta et al 2015)
Its annual production is estimated at 1,35,000 tonnes, representing just under 0.6% of root and tuber crops produced in Ghana (FAOSTAT 2013)
The objective of this study was to evaluate 26 elite non-sweet and less sweet sweetpotato varieties developed through accelerated breeding scheme (ABS) on-farm with regard to their release as commercial varieties using mother–baby trial
Summary
Sweetpotato (Ipomoea batatas L. (Lam)) belongs to the botanical family Convolvulaceae (Thottappilly 2009) and its among the few crop plants of major economic importance in the family use for food globally (Eich 2008), which may be due to the Agrobacterium infection which occurred in its evolution (Kyndta et al 2015). The potential of sweetpotato in food security and global wellbeing has been reported (Van Hal 2000; BouvelleBenjamin 2007; Low et al 2009; Betty 2011; Health Research Staff 2012; Jacobi 2013; Oliver 2015; Eating Well 2019). It is the fourth most important root and tuber crop in Ghana in terms of production (Baafi et al 2016c).
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