Identification of Host Plant Resistance to Anthracnose in  Greater Yam (Dioscorea alata L.)

Arya, Rekha; Sheela, M.N.; Jeeva, M. L.; Abhilash, P.V.

doi:10.20546/ijcmas.2019.808.199

Cited by 4 publications

(3 citation statements)

References 3 publications

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“…alata lines Da. 110, Jas 2, and TCR 142 were found to be highly resistant to anthracnose following laboratory and field screening in India (Arya et al, 2019 ). These resistant lines were recommended for further evaluation and use in breeding programmes.…”

Section: Control and Management Of Yam Anthracnosementioning

confidence: 99%

Strategies to combat the problem of yam anthracnose disease: Status and prospects

Ntui

Uyoh

Ita

et al. 2021

Molecular Plant Pathology

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Section: Control and Management Of Yam Anthracnosementioning

confidence: 99%

Strategies to combat the problem of yam anthracnose disease: Status and prospects

Ntui

Uyoh

Ita

et al. 2021

Molecular Plant Pathology

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“…Anthracnose-resistant cultivars of yam such as TDa1425 and TDr2040 were identified at IITA [ 22 ]. In India, laboratory and field investigations also found highly resistant D. alata lines [ 23 ]. However, this effort is arduous and considerably slow due to the crop’s heterozygous and vegetatively propagated nature [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

Identification of QTLs Controlling Resistance to Anthracnose Disease in Water Yam (Dioscorea alata)

Agre

Darkwa²,

Olasanmi

et al. 2022

Genes

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Anthracnose disease caused by a fungus Colletotrichum gloeosporioides is the primary cause of yield loss in water yam (Dioscorea alata), the widely cultivated species of yam. Resistance to yam anthracnose disease (YAD) is a prime target in breeding initiatives to develop durable-resistant cultivars for sustainable management of the disease in water yam cultivation. This study aimed at tagging quantitative trait loci (QTL) for anthracnose disease resistance in a bi-parental mapping population of D. alata. Parent genotypes and their recombinant progenies were genotyped using the Genotyping by Sequencing (GBS) platform and phenotyped in two crop cycles for two years. A high-density genetic linkage map was built with 3184 polymorphic Single Nucleotide Polymorphism (NSP) markers well distributed across the genome, covering 1460.94 cM total length. On average, 163 SNP markers were mapped per chromosome with 0.58 genetic distances between SNPs. Four QTL regions related to yam anthracnose disease resistance were identified on three chromosomes. The proportion of phenotypic variance explained by these QTLs ranged from 29.54 to 39.40%. The QTL regions identified showed genes that code for known plant defense responses such as GDSL-like Lipase/Acylhydrolase, Protein kinase domain, and F-box protein. The results from the present study provide valuable insight into the genetic architecture of anthracnose resistance in water yam. The candidate markers identified herewith form a relevant resource to apply marker-assisted selection as an alternative to a conventional labor-intensive screening for anthracnose resistance in water yam.

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“…Una de las estrategias de manejo que se viene implementando en Colombia, en el departamento de Córdoba, son las siembras intercaladas de genotipos susceptibles como el D. alata variedad Concha de coco, con genotipos resistentes como lo es la variedad Diamantes 22, consiguiendo reducir la severidad en el genotipo susceptible en 29% e incrementando los rendimientos en 554 kg.ha -1 (Campo y Luna, 1998). En África e India se ha evaluado la resistencia del banco de germoplasma de ñame a la antracnosis, bajo condiciones de campo en lotes en donde la enfermedad se manifiesta en forma endémica, teniendo como resultado varios genotipos con resistencia a la enfermedad (Ayisah et al, 2019;Arya et al, 2019). Trabajos similares se adelantan en Colombia por parte de la Universidad de Córdoba, quienes vienen evaluando anualmente la resistencia del banco de germoplasma a la antracnosis (Campo, 2011).…”

Section: Uso De Cultivares Resistentesunclassified

La antracnosis del ñame y estrategias de manejo: una revisión

Arana

Barroso

2020

Temas Agrarios

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El ñame (Dioscorea spp.) es un tubérculo comestible de importancia económica en regiones tropicales, siendo un alimento básico de más de 155 millones de personas. Sin embargo, el rendimiento del cultivo se puede ver afectado por enfermedades devastadoras como la antracnosis (Colletotrichum spp.), la cual puede causar pérdidas de rendimientos hasta un 80% en zonas endémicas, si no se aplican medidas eficaces de manejo. En este sentido, se presenta el siguiente artículo de revisión, el cual tiene como objetivo buscar literatura que permita conocer las investigaciones que se están realizando sobre la antracnosis del ñame, su biología y epidemiología, la sintomatología, etiología y las diferentes estrategias para su manejo. Se describen los síntomas de la enfermedad, la biología y la epidemiología de su principal agente causal Colletotrichum gloeosporioides. Finalmente se presenta las diferentes estrategias de manejo empleadas como son el control genético, cultural, biológico y químico. Se concluye que en el manejo de la enfermedad debe emplearse el método integrado, partiendo de la selección de campos con baja cantidad de inóculo primario, siembra de genotipos resistentes o tolerantes, empleando semilla asexual sana protegida con fungicidas.

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Identification of Host Plant Resistance to Anthracnose in Greater Yam (Dioscorea alata L.)

Cited by 4 publications

References 3 publications

Strategies to combat the problem of yam anthracnose disease: Status and prospects

Strategies to combat the problem of yam anthracnose disease: Status and prospects

Identification of QTLs Controlling Resistance to Anthracnose Disease in Water Yam (Dioscorea alata)

La antracnosis del ñame y estrategias de manejo: una revisión

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