Diversity, distribution and ethnobotanical importance of cultivated and wild African trifoliate yam [Dioscorea dumetorum (Kunth) Pax] in Benin

2019 ◽  
Vol 66 (3) ◽  
pp. 659-683 ◽  
Author(s):  
Fabienne Adétola Adigoun-Akotegnon ◽  
Hubert Adoukonou-Sagbadja ◽  
Charles Fadinan ◽  
Ariel Tchougourou ◽  
Micheline Agassounon-Tchibozo ◽  
...  
Keyword(s):  
Trifoliate Yam

scholarly journals Influence of Cultivar on the Postharvest Hardening of Trifoliate Yam (Dioscorea dumetorum) Tubers

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Christian Siadjeu ◽  
Emmanuel Akdowa Panyoo ◽  
Gabriel Mahbou Somo Toukam ◽  
Joseph Martin Bell ◽  
Benoit Nono ◽  
...  
Keyword(s):  
High Altitude ◽  
Breeding Program ◽  
Ambient Conditions ◽  
Flesh Colour ◽  
Physiological Maturity ◽  
Yellow Flesh ◽  
Low Altitude ◽  
Trifoliate Yam

The influence of cultivar on the postharvest hardening ofDioscorea dumetorumtubers was assessed. 32 cultivars ofD. dumetorumtubers were planted in April 2014, harvested at physiological maturity, and stored under prevailing tropical ambient conditions (19–28°C, 60–85% RH) for 0, 5, 14, 21, and 28 days. Samples were evaluated for cooked hardness. Results showed that one cultivar, Ibo sweet 3, was not affected by the hardening phenomenon. The remaining 31 were all subject to the hardening phenomenon at different degree. Cooked hardness increased more rapidly in cultivars with many roots on the tuber surface compared to cultivars with few roots on the tuber surface. When both the characteristics flesh colour and number of roots on tuber surface were associated, cooked hardness in cultivars with yellow flesh and many roots increased more rapidly than in cultivars with white flesh and many roots, whereas cooked hardness in cultivars with yellow flesh and few roots increased more slowly than in cultivars with white flesh and few roots. Accessions collected in high altitude increased more rapidly compared to accessions collected in low altitude. The cultivar Ibo sweet 3 identified in this study could provide important information for breeding program ofD. dumetorumagainst postharvest hardening phenomenon.

Effect of Soaking Time on the Pasting Properties of Two Cultivars of Trifoliate Yam (Dioscorea dumetorum) Flours

2009 ◽  
Vol 8 (10) ◽  
pp. 1537-1539 ◽  
Author(s):  
Olufunmilola Adunni Abiodun ◽  
Jacob Adeyosoye Adegbite ◽  
Tajudeen Solagbade Oladipo
Keyword(s):  
Pasting Properties ◽  
Soaking Time ◽  
Trifoliate Yam

scholarly journals Transcriptome sequence reveals candidate genes involving in the post-harvest hardening of trifoliate yam Dioscorea dumetorum

2021 ◽  
Author(s):  
Christian Siadjeu ◽  
Eike Mayland-Quellhorst ◽  
Sascha Laubinger ◽  
Dirk C. Albach
Keyword(s):  
Functional Analysis ◽  
Candidate Genes ◽  
Molecular Breeding ◽  
Rna Seq ◽  
Post Harvest ◽  
Genes Expression ◽  
Genes Encoding ◽  
Hypothetical Mechanism ◽  
Trifoliate Yam ◽  
Storage Ability

AbstractStorage ability of D. dumetorum is restricted by a severe phenomenon of post-harvest hardening which starts 72h after harvest and renders tubers inedible. Previous work has only focused on the biochemistry changes affecting the PHH on D. dumetorum. To the best of our knowledge nobody has identified candidate genes responsible for hardness on D. dumetorum. Here, transcriptome analysis of D. dumetorum tubers was performed, 4 months after emergence (4MAE), after harvest (AH), 3 days AH (3DAH) and 14 days AH (14DAH) on four accessions using RNA-Seq. In total between AH and 3DAH, 165, 199,128 and 61 differentially expressed genes (DEGs) were detected in Bayangam 2, Fonkouankem 1, Bangou 1 and Ibo sweet 3 respectively. Functional analysis of DEGs revealed that genes encoding for cellulose synthase A, xylan O-acetyltransferase chlorophyll a/b binding protein 1,2,3,4 and transcription factor MYBP were found predominantly and significantly up-regulated 3DAH, implying that genes were potentially involved in the post-harvest hardening. A hypothetical mechanism of this phenomenon and its regulation has been proposed. These findings provide the first comprehensive insights into genes expression in yam tubers after harvest and valuable information for molecular breeding against the post-harvest hardening. A hypothetical mechanism of this phenomenon and its regulation has been proposed. These findings provide the first comprehensive insights into genes expression in yam tubers after harvest and valuable information for molecular breeding against the post-harvest hardening.

scholarly journals High Contiguity de novo Genome Sequence Assembly of Trifoliate Yam (Dioscorea dumetorum) Using Long Read Sequencing

Genes ◽  
2020 ◽  
Vol 11 (3) ◽  
pp. 274 ◽  
Author(s):  
Christian Siadjeu ◽  
Boas Pucker ◽  
Prisca Viehöver ◽  
Dirk C. Albach ◽  
Bernd Weisshaar
Keyword(s):  
De Novo ◽  
Functional Annotations ◽  
Genome Sequence Assembly ◽  
Non Coding Rna ◽  
Protein Encoding ◽  
Long Read ◽  
Encoding Gene ◽  
Rna Genes ◽  
Orphan Crop ◽  
Trifoliate Yam

Trifoliate yam (Dioscorea dumetorum) is one example of an orphan crop, not traded internationally. Post-harvest hardening of the tubers of this species starts within 24 h after harvesting and renders the tubers inedible. Genomic resources are required for D. dumetorum to improve breeding for non-hardening varieties as well as for other traits. We sequenced the D. dumetorum genome and generated the corresponding annotation. The two haplophases of this highly heterozygous genome were separated to a large extent. The assembly represents 485 Mbp of the genome with an N50 of over 3.2 Mbp. A total of 35,269 protein-encoding gene models as well as 9941 non-coding RNA genes were predicted, and functional annotations were assigned.

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