Analysis of genetic diversity in a sweet potato (Ipomoea batatas L.) germplasm collection from Tanzania as revealed by AFLP

Elameen, Abdelhameed; Fjellheim, Siri; Larsen, Arild; Rognli, Odd Arne; Sundheim, Leif; Msolla, S Nchimbi; Masumba, Esther; Mtunda, K.; Klemsdal, Sonja S.

doi:10.1007/s10722-007-9247-0

Cited by 46 publications

(55 citation statements)

References 29 publications

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“…This agrees with a study conducted by Elameen et al (2008) on sweet potato varieties who found that only few of the populations studied had sufficient diversity. Lack of genetic diversity implies that the crop may be susceptible to pest and diseases as there is no enough material to evaluate superior varieties and thus leading to enormous loss of crop.…”

Section: Popsupporting

confidence: 92%

Genetic structure and diversity of East African taro [Colocasia esculenta (L.) Schott]

Macharia¹,

Runo²,

Muchugi³

et al. 2014

Afr. J. Biotechnol.

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Taro [Colocasia esculenta (L) Schott] is mainly produced in. Principal component analysis of microsatellite data indicated variation but did not show any distinct structure. Population diversity estimate was relatively low with the highest being 0.27, for accessions sourced from Lake Victoria basin. Analysis of molecular variance (AMOVA) revealed most variation among individuals within population at 79%. Nei's genetic distance showed that relatedness is not based on geographical proximity. Based on these findings, this study proposes establishment of a regional collection that will be conserved and ensure a broad genetic base for available varieties and enable development of improved varieties through breeding programmes.

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Section: Popsupporting

confidence: 92%

Genetic structure and diversity of East African taro [Colocasia esculenta (L.) Schott]

Macharia¹,

Runo²,

Muchugi³

et al. 2014

Afr. J. Biotechnol.

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“…AFLP analysis [21] was performed as previously described [32], with modifications that included the use of fluorescently labeled primers instead of radioactive labeling. Genomic DNA, (approximately 300 ng) was double-digested using EcoRI and the MseI isoschizomer Tru1I, followed by ligation to the adaptors overnight at room temperature.…”

Section: Aflp Analysismentioning

confidence: 99%

Genetic Diversity in Apple Fruit Moth Indicate Different Clusters in the Two Most Important Apple Growing Regions of Norway

2016

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Abstract:The apple fruit moth (Argyresthia conjugella (A. conjugella)) in Norway was first identified as a pest in apple production in 1899. We here report the first genetic analysis of A. conjugella using molecular markers. Amplified fragment length polymorphism (AFLP) analysis was applied to 95 individuals from six different locations in the two most important apple-growing regions of Norway. Five AFLP primer combinations gave 410 clear polymorphic bands that distinguished all the individuals. Further genetic analysis using the Dice coefficient, Principal Coordinate analysis (PCO) and Bayesian analyses suggested clustering of the individuals into two main groups showing substantial genetic distance. Analysis of molecular variance (AMOVA) revealed greater variation among populations (77.94%) than within populations (22.06%) and significant and high F ST values were determined between the two major regions (Distance = 230 km, F ST = 0.780). AFLP analysis revealed low to moderate genetic diversity in our population sample from Norway (Average: 0.31 expected heterozygosity). The positive significant correlation between the geographic and the molecular data (r 2 = 0.6700) indicate that genetic differences between the two major regions may be due to geographical barriers such as high mountain plateaus (Hardangervidda) in addition to isolation by distance (IBD).

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“…China is the highest producer with production figures around 75.6 million tonnes, followed by Tanzania and Nigeria that produce up to 3.57 and 2.73 million tonnes, respectively. Sweet potato is among five most important crops in 40 developing countries beside rice, wheat, maize, and cassava [2].…”

Section: Introductionmentioning

confidence: 99%

Sweet Potato Value Chain Analysis Reveals Opportunities for Increased Income and Food Security in Northern Ghana

Sugri

Maalekuu

Gaveh

et al. 2017

Advances in Agriculture

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Sweet potato has gained prominence due to its ability to adapt to wide production ecologies and yield response to minimal external inputs. Orange-fleshed cultivars in particular have immense potential to improve household income and nutrition in sub-Saharan Africa. However, the sweet potato value chain (SPVC) is not well-developed in many producing countries. The study was conducted in two regions to characterize the production operations as well as identify opportunities to propel the SPVC in Northern Ghana. Data were collected using mixed methods including structured questionnaires via face-to-face interviews. Analysis of strengths, weaknesses, opportunities, and threats (SWOT) was conducted at multistakeholder platforms with different actors. Gross margin profit and benefit-cost ratios were determined by using six cost variables. Overall, the industry was largely a fresh produce market, targeting food vendors, processors, and direct selling to wholesalers, retailers, and household consumers. The SWOT analysis revealed wide-ranging opportunities including favourable production ecologies, processing options, and insatiable local and international markets. The institutional actors need to network the primary actors to synergistically operate with a collective profit motive. The most prioritized production constraints such as access to seed, cost of chemical fertilizer, short shelf-life, field pests and diseases, and declining soil fertility should be addressed.

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Analysis of genetic diversity in a sweet potato (Ipomoea batatas L.) germplasm collection from Tanzania as revealed by AFLP

Cited by 46 publications

References 29 publications

Genetic structure and diversity of East African taro [Colocasia esculenta (L.) Schott]

Genetic structure and diversity of East African taro [Colocasia esculenta (L.) Schott]

Genetic Diversity in Apple Fruit Moth Indicate Different Clusters in the Two Most Important Apple Growing Regions of Norway

Sweet Potato Value Chain Analysis Reveals Opportunities for Increased Income and Food Security in Northern Ghana

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