Inheritance of resistance in water yam (Dioscorea alata) to anthracnose (Colletotrichum gloeosporioides)

Mignouna, H.D.; Abang, Mathew M.; Green, K.R.; Asiedu, Robert

doi:10.1007/s001220000531

Cited by 44 publications

(65 citation statements)

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“…Mapping population and anthracnose resistance screening Two tetraploid D. alata genotypes that discriminate the FGS and SGG strains of C. gloeosporioides, and carry different anthracnose resistance genes (Mignouna et al 2001a), were chosen for the development of a mapping population. The female parent (TDa 95/00328) and male parent (TDa 87/01091) were cross-pollinated in the field.…”

Section: Methodsmentioning

confidence: 99%

“…Anthracnose disease, caused by Colletotrichum gloeosporioides (Abang et al 2002), is a serious constraint to the sustainable cultivation of D. alata worldwide (Winch et al 1984;Nwankiti et al 1987;Macdonald et al 1998). Resistance to the moderately virulent fast-growing salmon (FGS) strain of C. gloeosporioides in the tetraploid breeding line TDa 95/00328 was found to be strain-specific and appeared to be controlled by a single major dominant locus; however, results suggested the presence of an additional resistance gene (s) (Mignouna et al 2001a). The FGS strain is presently the predominant virulence phenotype in Nigeria and represents a genetically heterogeneous population (Thottappilly et al 1999;Abang et al 2001Abang et al , 2002.…”

Section: Introductionmentioning

confidence: 92%

“…Genetic improvement programmes at IITA (Nigeria) and at the Central Tuber Crops Research Institute (CTCRI, India) have been developing high yielding D. alata varieties with resistance to pests and diseases to meet farmers' requirements. Apart from recent studies on the inheritance of resistance to anthracnose disease (Mignouna et al 2001a), little is known concerning the genetics of resistance to the major pests and diseases of water yam. Anthracnose disease, caused by Colletotrichum gloeosporioides (Abang et al 2002), is a serious constraint to the sustainable cultivation of D. alata worldwide (Winch et al 1984;Nwankiti et al 1987;Macdonald et al 1998).…”

Section: Introductionmentioning

confidence: 99%

“…The FGS strain is presently the predominant virulence phenotype in Nigeria and represents a genetically heterogeneous population (Thottappilly et al 1999;Abang et al 2001Abang et al , 2002. In view of the high genetic diversity of C. gloeosporioides from yam, an obvious strategy is to combine resistance to the FGS strain with resistance to strains such as the highly virulent slow-growing grey (SGG) strain, for which sources of resistance were recently identified (Mignouna et al 2001a). Anthracnose resistance breeding is a considerably slow and cumbersome process, owing to the biological constraints of a heterozygous, vegetatively propagated crop (Tanksley and Nelson 1996;Asiedu et al 1998).…”

Section: Introductionmentioning

confidence: 99%

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A genetic linkage map of water yam (Dioscorea alata L.) based on AFLP markers and QTL analysis for anthracnose resistance

Mignouna¹,

Mank

Ellis

et al. 2002

Theor Appl Genet

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A genetic linkage map of the tetraploid water yam ( Dioscorea alata L.) genome was constructed based on 469 co-dominantly scored amplified fragment length polymorphism (AFLP) markers segregating in an intraspecific F(1) cross. The F(1) was obtained by crossing two improved breeding lines, TDa 95/00328 as female parent and TDa 87/01091 as male parent. Since the mapping population was an F(1) cross between presumed heterozygous parents, marker segregation data from both parents were initially split into maternal and paternal data sets, and separate genetic linkage maps were constructed. Later, data analysis showed that this was not necessary and thus the combined markers from both parents were used to construct a genetic linkage map. The 469 markers were mapped on 20 linkage groups with a total map length of 1,233 cM and a mean marker spacing of 2.62 cM. The markers segregated like a diploid cross-pollinator population suggesting that the water yam genome is allo-tetraploid (2n = 4 x = 40). QTL mapping revealed one AFLP marker E-14/M52-307 located on linkage group 2 that was associated with anthracnose resistance, explaining 10% of the total phenotypic variance. This map covers 65% of the yam genome and is the first linkage map reported for D. alata. The map provides a tool for further genetic analysis of traits of agronomic importance and for using marker-assisted selection in D. alata breeding programmes. QTL mapping opens new avenues for accumulating anthracnose resistance genes in preferred D. alata cultivars.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A genetic linkage map of water yam (Dioscorea alata L.) based on AFLP markers and QTL analysis for anthracnose resistance

Mignouna¹,

Mank

Ellis

et al. 2002

Theor Appl Genet

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“…Segregation ratios from early research indicated that a single dominant gene in a simplex condition governs the resistance in clone TDr 89/01444, while the resistance in clone TDr 93-2 is associated with the presence of a major recessive gene in duplex configuration (Mignouna et al, 2001b). Likewise, one AFLP marker (E-14/M52-307) on linkage group 2 appears to be associated with anthracnose resistance (about 10% of the total phenotypic variance) (Mignouna et al, 2002a), a trait that was reported early as dominant and polygenic (Mignouna et al, 2001a). DNA markers may be useful for aided introgression and selection while dealing with disease-resistance genes in yams (Mignouna et al, 2002d, e).…”

Section: Advances In Dna Mapping and Potential Of Marker-aided Breedingmentioning

confidence: 99%

Breeding Vegetatively Propagated Crops

Ortíz¹,

Dochez²,

Asiedu³

et al. 2006

Plant Breeding: The Arnel R. Hallauer International Symposium

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Potential applications of the CRISPR/Cas technology for genetic improvement of yam (Dioscorea spp.)

Syombua

Tripathi

Obiero

et al. 2021

Food and Energy Security

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Yam (Dioscorea spp.) is an economically important crop grown in the tropical and subtropical regions, producing tuberous roots that serve as a staple food, an income source, and an excellent source of various pharmaceutical precursors. Yam production is constrained by disease and pest infestations and a range of abiotic stresses. Genetic improvement can significantly mitigate these challenges, improve productivity, expand the yam markets, and increase economic gains. However, several intrinsic attributes of the crop have curtailed progress in yam breeding. Advanced genetic engineering such as genome editing by sequence‐specific nucleases has emerged as complementary approaches to conventional breeding techniques. Mainly, the clustered regularly interspaced short palindromic repeats/CRISPR‐associated protein (CRISPR/Cas) system for genome editing has provided robust platforms for gene function analysis and crop improvement in the post‐genomic era. Despite its significance, research towards improving the yam species remains under‐represented compared to other staple tuber crops such as cassava and sweet potato. Thus, it is critical to explore avenues for increasing the genetic gains from this under‐exploited crop. The present review focuses on the progress and prospects for applying the CRISPR/Cas technology for yam improvement. The study elaborates on the currently available CRISPR/Cas tool for yam genome engineering and explores the potential applications of this toolkit in mitigating the various challenges encountered in yam production and consumption. Furthermore, we have delved into the challenges associated with this technology and the improvements made to minimize these challenges. The insights presented herein provide a guide for yam improvement to increase genetic gains from this under‐researched and under‐utilized resource.

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Inheritance of resistance in water yam (Dioscorea alata) to anthracnose (Colletotrichum gloeosporioides)

Cited by 44 publications

References 8 publications

A genetic linkage map of water yam (Dioscorea alata L.) based on AFLP markers and QTL analysis for anthracnose resistance

A genetic linkage map of water yam (Dioscorea alata L.) based on AFLP markers and QTL analysis for anthracnose resistance

Breeding Vegetatively Propagated Crops

Potential applications of the CRISPR/Cas technology for genetic improvement of yam (Dioscorea spp.)

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