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Sweetpotato (Ipomoea batatas (L.) Lam) is the fourth most important root and tuber crop in Ghana, in terms of production. Attainment of increased sweetpotato utilization has become an important breeding objective in Ghana recently. The major emphasis in breeding is on the development of farmer/consumer preferred varieties. This study aimed at devel...
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Context 1
... addition, accessions were collected from the Crop Science Department, University of Ghana and the International Potato Centre (CIP) gene bank in Accra and Kumasi, respectively. A total of 115 sweetpotato accessions (Table 1) were collected. These represent four groups, namely local accessions (32), local improved accessions (13), exotic and local accessions in National Agricultural Research Systems (NARS) or Programmes (43), and exotic accessions from CIP, Kumasi germplasm (27). ...Context 2
... per cent of the F 1 hybrids had sugar content lower than Ogyefo (13.58%). Crosses Histarch × CIP 442264 and Histarch × AAT-03-025 had significant differences (P < 0.05) for only dry matter content and root yield (Table 9 and 11). There were no significant estimates for heterosis between crosses Histarch × CIP 442264 (Table 10), but some F 1 progeny had significant heterosis for dry matter content, sugar content and storage root yield in crosses between Histarch and Ogyefo (Table 8). ...Context 3
... Histarch × CIP 442264 and Histarch × AAT-03-025 had significant differences (P < 0.05) for only dry matter content and root yield (Table 9 and 11). There were no significant estimates for heterosis between crosses Histarch × CIP 442264 (Table 10), but some F 1 progeny had significant heterosis for dry matter content, sugar content and storage root yield in crosses between Histarch and Ogyefo (Table 8). Heterosis was significant for dry matter content and storage root yield for crosses between Histarch and AAT-03-025 (Table 12). ...Context 4
... were no significant estimates for heterosis between crosses Histarch × CIP 442264 (Table 10), but some F 1 progeny had significant heterosis for dry matter content, sugar content and storage root yield in crosses between Histarch and Ogyefo (Table 8). Heterosis was significant for dry matter content and storage root yield for crosses between Histarch and AAT-03-025 (Table 12). Both positive and negative heterosis was seen. ...Similar publications
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Citations
... Consumer preference for a particular crop variety is often influenced by quality attributes such as appearance, smell, texture, and taste, among others, which must be considered for effective varietal improvement (Siegrist & Hartmann, 2020). Shifting the focus of breeding programs to end-user preferred traits, especially based on sensory acceptance attributes, has been shown to be a worthwhile strategy to drive demand for new varieties (Baafi et al., 2016;Wismer et al., 2005). ...
... Mealiness is a common sought-after characteristic in several countries in the Global South (cf. Mwanga et al., 2021), while preference for sweet varieties can differ considerably, with consumers in some countries preferring non-sweet varieties (Baafi et al., 2016). Poor taste is the main characteristic of the least preferred varieties (Table 6). ...
... These findings are largely consistent with what found by many scholars in sub-Saharan countries: mealiness, sweet taste, and good smell are important characteristics for boiled sweetpotato (Mwanga et al., 2016Tomlins et al., 2012;Tumwegamire et al., 2011). However, as previously reported, sweet taste is not a preferred trait in all countries (Baafi et al., 2016). In addition, we found that women prioritized its smell and flavor, while men its softness (Table 9). ...
Cognizant of the need to refocus breeding efforts toward end‐product quality traits taking into account the preferences of consumers and in consideration of the rapid urbanization in South‐eastern Asia, this study investigated the consumer's preferences for sweetpotato in Hanoi. Using a mixed‐methods research design, the study identified the most preferred and least preferred attributes of both the fresh and boiled product, disaggregated by gender, age, and socioeconomic status. Preferences and associated traits of six popular varieties were determined. Results indicate that while these varieties largely already meet consumers' preferences, consumers have a clear preference for a few varieties for which marginal adjustments are needed to further increase their acceptability among the growing urban population. Our findings indicate the direction of these adjustments and can contribute to inform demand‐led national and international breeding programs and, ultimately, to higher and faster variety uptake and adoption.
... Over the last decade, improvements in demand-led breeding programs, albeit small, have increasingly re-directed research priorities toward stimulating and enhancing variety uptake and adoption along the different nodes of the value chain. Shifting the focus of breeding programs to consumer preferred traits, especially based on sensory acceptance attributes, has been shown to be a worthwhile strategy to drive demand for new sweetpotato varieties along the value chain (Wismer et al., 2005;Jaron et al., 2015;Baafi et al., 2016). ...
Crowdsourced citizen science is an emerging approach in plant sciences. The triadic comparison of technologies (tricot) approach has been successfully utilized by demand-led breeding programmes to identify varieties for dissemination suited to specific geographic and climatic regions. An important feature of this approach is the independent way in which farmers individually evaluate the varieties on their own farms as "citizen scientists." In this study, we adapted this approach to evaluate consumer preferences to boiled sweetpotato [Ipomoea batatas (L.) Lam] roots of 21 advanced breeding materials and varieties in Ghana and 6 released varieties in Uganda. We were specifically interested in evaluating if a more independent style of evaluation (home tasting) would produce results comparable to an approach that involves control over preparation (centralized tasting). We compiled data from 1,433 participants who individually contributed to a home tasting (de-centralized) and a centralized tasting trial in Ghana and Uganda, evaluating overall acceptability, and indicating the reasons for their preferences. Geographic factors showed important contribution to define consumers' preference to boiled sweetpotato genotypes. Home and centralized tasting approaches gave similar rankings for overall acceptability, which was strongly correlated to taste. In both Ghana and Uganda, it was possible to robustly identify superior sweetpotato genotypes from consumers' perspectives. Our results indicate that the tricot approach can be successfully applied to consumer preference studies.
... 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 well- Baafi 2014). The decision to adopt a new cultivar is complexly related to field and yield performance as well as consumer taste acceptability (Sugri et al. 2012). ...
... It is reported that some cultivars were not adopted because of lack of sufficient consideration of farmers' and consumers' preference (Toomey 1999 (Missah and Kissiedu 1994). Orange-fleshed sweetpotatoes were introduced to combat vitamin A deficiency at relatively cheaper cost but they have low dry matter content (Baafi 2014). High dry matter is one of the important attributes that affects consumer preference in most of sub-Saharan Africa (Tumwegamire et al. 2004). ...
Increased sweetpotato utilization has become an important breeding objective recently, with much emphasis on the development of non-sweet sweetpota-toes 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 and Alcidodes.
... Our results clearly show that sugar content alone did not explain perceived sweetness in boiled sweetpotato samples, and there is a need for additional sensory analysis to describe attributes found in the sweetpotato germplasm, and relate them to consumer preferences in Ghana and elsewhere. Previous reports describing sugar levels in raw sweetpotato (Baafi et al., 2016) may not be useful for predicting sweetness or taste in cooked sweetpotato. Given the expressed desire of Ghanaian consumers for non-sweet, staple-type sweetpotato, we intend to explore this in greater depth through consumer sensory analysis and focus group discussions using germplasm from our breeding program spanning a range of flesh color, sugar and sweetness combinations from low sugar, low sweet through to high sugar and sweet, both in boiled and fried form. ...
... Breeding for such cultivars may require many cycles of selection and hybridisation to break genetic linkages associated with the traits. However, beta-carotene is controlled by a limited number of genes (Oduro, 2013;Baafi, 2014) and should be easy to manipulate. The results also showed that dry matter content, sugar content and most of the physico-chemical traits (except protein) may indirectly be selected using betacarotene content (the orange-fleshed colour). ...
... Apomuden and Beauregard had the highest beta-carotene, iron and zinc content among the four parents. Parents with higher beta-carotene content had higher iron and zinc content due to the strong positive genotypic correlation among the traits (Baafi, 2014). This indicates that breeding sweetpotato genotypes with high beta-carotene, iron and zinc content will not be too difficult due to the strong positive genotypic association between the traits if suitable parents are used. ...
Micronutrients deficiency is a major contributor to poor health in developing countries. It can be alleviated by biofortification or enrichment of staple crops with micronutrients. Sweetpotato is a major staple crop in numerous tropical countries and is naturally biofortified. In spite of extensive promotion of orange-fleshed sweetpotatovarieties (OFSPs), they are poorly utilized as staple food in most parts of West Africa because of their low dry matter and high sugar content. Beta-carotene is positively correlated with iron and zinc content in sweetpotato. Development of sweetpotato cultivars with end-user preferred traits and higher content of beta-carotene, iron and zinc will alleviate their deficiencies. Knowledge on the genetic control of these traits is critical for their improvement in sweetpotato. This study used diallel mating design to estimate general combining ability (GCA) and specific combining ability (SCA) of storage root beta-carotene, iron and zinc content to determine the genetic control of these traits for sweetpotato breeding. A general model for estimating genetic effect, Gardner and Eberhart analysis II (GEAN II), was used for data analysis. Genetic variability for the traits indicated that they were mostly controlled by additive gene effect. Significant heterosis was found indicating that levels of these micronutrients can be improved in sweetpotato through breeding.
... Significance of the overall heterosis (Table 3) indicates some opportunity for exploitation of heterosis for breeding non-sweet, high dry matter sweetpotato varieties that are preferred by farmers and consumers in Ghana. Heterosis for dry matter, starch and sugar content is present in sweetpotato progenies between certain varieties (Grüneberg et al. 2009;Baafi et al. 2016). In this study, only reciprocal crosses Ogyefo × Apomuden and Histarch × Beauregard showed significant specific heterosis for dry matter, starch and sugar content (Table 6). ...
... Crosses Ogyefo × Apomuden and Histarch × Beauregard produced progenies Ogyefo × Apomuden-16 and Histarch × Beauregard-14, respectively ( These progenies showed superior performance over their parents for dry matter, starch and sugar content except Ogyefo × Apomuden-16 which showed similar performance in sugar content as Ogyefo. Sweetpotato progenies with superior performance were reported by Baafi et al. (2016). While those superior progenies were obtained from non-contrasting parents (high dry matter, high starch and low sugar parents), superior progenies obtained in this study were from contrasting parents. ...
Sweetpotato (Ipomoea batatas L. (Lam)) is a nutritious food security crop for most tropical households, but its utilisation is very low in Ghana compared to the other root and tuber crops due to lack of end-user-preferred cultivars. Knowledge on the genetic control of important traits such as dry matter, starch and sugar content of sweetpotato storage roots in a breeding population is critical for making breeding progress in developing sweetpotato varieties preferred by farmers and consumers. This study used diallel mating design to elucidate general combining ability and specific combining ability, to determine the gene action controlling storage root dry matter, starch and sugar content in sweetpotato and the heterotic potential of the traits to facilitate the crop’s improvement for increased utilisation. A general model for estimating genetic effects, GEAN II, was used to analyse the data. Genetic variability was seen for dry matter, starch and sugar content of sweetpotato and much of this genetic variation was additive in nature. The study also revealed significant heterosis in sweetpotato which offers opportunity for breeding non-sweet, high dry matter sweetpotato varieties that are preferred by farmers and consumers in Ghana.
... Sweetpotato preference varies with ethnic background as well as geographic location. Consumers in Ghana prefer nonsweet, high dry matter sweetpotato cultivars (Sam and Dapaah, 2009;Baafi, 2014;Baafi et al., 2015). However, locally available clones are very sweet, limiting their consumption as a staple food (Missah and Kissiedu, 1994;Baafi et al., 2015). ...
Sweetpotatoes utilization is low in Ghana due to lack of farmer and consumer preferred cultivars. Poor flowering and incompatibilities among genotypes limit breeding progress in its improvement. The objective was to assess compatibilities among sweetpotato genotypes to select good parents for breeding end-user preferred varieties for increased utilization. Twenty-one genotypes selected from 115 accessions evaluated across three contrasting environments were crossed using full diallel mating scheme. In all, 6388 crosses were carried out and 3214 seeds produced. This study sought to understand the genetic incompatibilities based on the number of seeds set per capsule after self- or cross-fertilization. Lack of flowering or poor flowering, and self- and cross-incompatibilities were major constraints to sweetpotato improvement found. Four genotypes (Histarch, Apomuden, Beauregard, and Ogyefo) were the best parents based on cross compatibilities and they can be used to determine the genetic control of beta-carotene, dry matter and sugar content in sweetpotato. Histarch and Ogyefo are recommended as parents for the development of non-sweet, high dry matter sweetpotato varieties that are the preferred cultivars in Ghana because of their low sugar content. Use of many genotypes in hybridization and establishment of crossing blocks in the minor cropping season is highly recommended.
... In spite of the extensive promotion of the beta-carotene-rich, OFSP varieties through various programs and projects, OFSP varieties are not used much in Ghana (Baafi 2014;Baafi et al. 2015). Low utilization of OFSPs is attributed to their low dry matter content and high sugar content (very sweet taste). ...
... Non-sweetness allows daily consumption of sweetpotatoes as a staple food (Baafi et al. 2015;Lebot 2010). Consumers in Ghana prefer non-sweet high dry matter sweetpotatoes (Baafi 2014;Baafi et al. 2015;Sam and Dapaah 2009). There is the need to improve the OFSPs to increase their consumer-preference and utilization in Ghana. ...
... Significant efforts have been made to find an economically feasible system for the development of such varieties. Studies have shown that there is exploitable heterosis in sweetpotato (Baafi 2014;Grüneberg et al. 2009) for important traits such as betacarotene, dry matter, and sugar content. The objective of this study was to develop farmer-and consumer-preferred beta-carotene-rich varieties to increase OFSP utilization in Ghana and beyond through exploitable heterosis. ...
Vitamin A deficiency (VAD) is of public health significance in the developing world. In spite of extensive promotion of orange-fleshed sweetpotato (Ipomoea batatas) varieties (OFSPs), they are poorly utilized in Ghana because of their low dry matter and high sugar content. The objective of this study was to develop farmer- and consumer-preferred beta-carotene-rich varieties to increase OFSP utilization in Ghana and beyond. One released variety in Ghana (Apomuden) and four other varieties which are introductions (Beauregard, Resisto, CIP 442850, and CIP 443035) were used as parents. They were crossed using the full diallel mating design. There was significant genetic variation for the traits and among the F1 hybrids. Significant positive and negative heterosis was found, but the levels were not adequate for the development of non-sweet, high dry matter, and high beta-carotene-rich varieties. Twenty-one F1 hybrids that had comparable beta-carotene content and storage root yield but lower sugar content than the only released high-beta-carotene variety in Ghana were identified for further testing for potential release.
... However, considering the health benefits of the beta-carotene in the orange-fleshed types, it is important to incorporate high dry matter into the high beta-carotene genetic backgrounds. Dry matter content and beta-carotene content are negatively correlated (Baafi, 2014;Grüneberg et al., 2009), but this correlation can be broken by breeding and advance biotechnology. Crossing and recombination between superior, high beta-carotene and high dry matter parents, and selection among segregating progenies for improved performance is needed to develop superior new varieties. ...
Sweetpotato is used in various food preparations in place of rice, cassava, yam and plantain in Ghana. In spite of this it does not have the same importance in Ghanaian diet as other root and tuber crops. Consumer taste, preference and acceptance are critical in determining the suitability of sweetpotato cultivars to any locality. A study was carried out in some selected communities of Ghana where sweetpotato is popular which span all five ecozones of Ghana in February, 2012. The main objective was to investigate why sweetpotato has low utilization compared with other root and tuber crops and to increase its utilization through breeding. The study employed Focus Group Discussion (FGD) followed by administration of Semi-structured Questionnaire (SSQ). Data collected were analysed using Genstat and Statistical Package for Social Sciences. Seventy-nine people consisting of 63% males and 37% females, and 178 people consisting of 52% female and 48% males were involved in the FGD and SSQ, respectively. Majority (94%) of farmers’ ranked sweetpotato from 1 to 5 among 24 cultivated crops. Only about 28% of consumers ate sweetpotato at least six days per week. The survey revealed that consumers in Ghana desired non-sweet, high dry matter sweetpotato cultivars. Therefore, there is need for Research and Development to adjust sweetpotato breeding objectives and selection procedures to develop high dry matter non-sweet sweetpotato varieties in Ghana.
