QTLs for resistance to anthracnose identified in two Capsicum sources

Mahasuk, Pitchayapa; Struss, D.; Mongkolporn, Orarat

doi:10.1007/s11032-016-0435-5

Cited by 52 publications

(36 citation statements)

References 27 publications

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“…A SNP-based linkage map of C. baccatum was constructed for QTL mapping of aphid resistance. The map contains 12 linkage groups, which is identical to the number of pepper chromosomes and covers a total length of 1319 cM, which is similar to some other published maps of either C. annuum or C. baccatum (Eun et al 2016;Lee et al 2016;Mahasuk et al 2016). Comparing our linkage map to the reference physical genome of C. annuum 'CM334' (Kim et al 2014) pointed at translocations between chromosomes 3 and 5, and chromosomes 3 and 9, which is consistent with previous observations (Lee et al 2016;Mahasuk et al 2016).…”

Section: Aphid Resistance Qtlssupporting

confidence: 90%

Aphid resistance in Capsicum maps to a locus containing LRR-RLK gene analogues

et al. 2019

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Key message A QTL for aphid resistance on pepper chromosome 2 was identified and validated. This QTL affects aphid survival and reproduction, and was fine mapped to a locus containing LRR-RLK analogues. Abstract Myzus persicae is one of the most threatening insect pests that adversely affects pepper (Capsicum) cultivation. Resistance to aphids was previously identified in Capsicum baccatum. This study aimed at elucidating the genetics of aphid resistance in C. baccatum. A QTL analysis was carried out for M. persicae resistance in an F 2 population derived from an intraspecific cross between a highly resistant plant and a susceptible plant. Survival and reproduction were used as resistance parameters. Interval mapping detected two QTLs affecting aphid survival (Rmpas-1) and reproduction (Rmprp-1), respectively, both localized in the same area and sharing the same top marker on chromosome 2. Use of this marker as co-factor in multiple-QTL mapping analysis revealed a second, minor QTL (Rmprp-2) only affecting aphid reproduction, on chromosome 4. Fine mapping confirmed the effects of Rmpas-1 and Rmprp-1 and narrowed the major QTL Rmprp-1 down to a genomic region of 96 kb which is predicted to encode four analogues of resistance genes of the receptor-like kinase family containing a leucine-rich repeat domain (LRR-RLKs). This work provides not only initial information for breeding aphid-resistant pepper varieties, but also forms the basis for future molecular analysis of gene(s) involved in aphid resistance.

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Section: Aphid Resistance Qtlssupporting

confidence: 90%

Aphid resistance in Capsicum maps to a locus containing LRR-RLK gene analogues

et al. 2019

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“…Moreover, two SNP maps were constructed from two chilli populations including C. annuum Bangchang x C. chinense PBC932, and C. baccatum PBC80 x CA1316. The validated SNPs are using in anthracnose breeding programs [85]. Recently, sources of resistance to C. truncatum and C. siamense, under both field and in vitro conditions, have been identified in C. annuum accessions (Table 1) [32].…”

Section: Anthracnose or Ripe Rot Of Peppermentioning

confidence: 99%

Overview of Biotic Stresses in Pepper (Capsicum spp.): Sources of Genetic Resistance, Molecular Breeding and Genomics

Parisi¹,

Alioto

Tripodi³

2020

IJMS

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Pepper (Capsicum spp.) is one of the major vegetable crops grown worldwide largely appreciated for its economic importance and nutritional value. This crop belongs to the large Solanaceae family, which, among more than 90 genera and 2500 species of flowering plants, includes commercially important vegetables such as tomato and eggplant. The genus includes over 30 species, five of which (C. annuum, C. frutescens, C. chinense, C. baccatum, and C. pubescens) are domesticated and mainly grown for consumption as food and for non-food purposes (e.g., cosmetics). The main challenges for vegetable crop improvement are linked to the sustainable development of agriculture, food security, the growing consumers’ demand for food. Furthermore, demographic trends and changes to climate require more efficient use of plant genetic resources in breeding programs. Increases in pepper consumption have been observed in the past 20 years, and for maintaining this trend, the development of new resistant and high yielding varieties is demanded. The range of pathogens afflicting peppers is very broad and includes fungi, viruses, bacteria, and insects. In this context, the large number of accessions of domesticated and wild species stored in the world seed banks represents a valuable resource for breeding in order to transfer traits related to resistance mechanisms to various biotic stresses. In the present review, we report comprehensive information on sources of resistance to a broad range of pathogens in pepper, revisiting the classical genetic studies and showing the contribution of genomics for the understanding of the molecular basis of resistance.

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“…baccatum revealed similar results, in that the resistances were classified based on hypersensitive reaction on the fruit, which was reported in these two Capsicum species (Mahasuk et al ., ,b). The genetic analyses in all chili populations also supported the fact that the resistances expressed at different fruit maturity stages were controlled by different genes (Mahasuk et al ., ,b, , ; Sun et al ., ). Consequently, fruit bioassays performed at different fruit maturity stages become a basic requirement in chili anthracnose resistance genetic studies and breeding.…”

Section: Pathogenicity Of Colletotrichum Infecting Chilimentioning

confidence: 99%

Chili anthracnose: Colletotrichum taxonomy and pathogenicity

Mongkolporn

Taylor

2018

Plant Pathology

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Chili anthracnose is caused by Colletotrichum species mostly associated with the acutatum, truncatum and gloeosporioides complexes. Since 2009 the Colletotrichum taxonomy has been extensively revised based on multigene phylogenetics, which has had a large impact on the number of species known to cause anthracnose disease of chili. This review discusses (i) the taxonomy of Colletotrichum spp. infecting chili, and (ii) the impact of Colletotrichum pathotypes on breeding for resistance to anthracnose. To date, 24 Colletotrichum species have been identified as pathogens of chili anthracnose, with the three main pathogens being C. scovillei, C. truncatum and C. siamense. Identification of several pathotypes within these three Colletotrichum species, particularly pathotypes that can overcome resistance in the related Capsicum species, Ca. chinense and Ca. baccatum, will be of major concern to plant breeders as they develop resistant chili genotypes from the transfer of resistance genes from these Capsicum species into Ca. annuum. Accurate identification of the Colletotrichum species causing anthracnose and improved understanding of the biology of the Colletotrichum species and their interaction with the host will enable the application of improved integrated disease management techniques.

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QTLs for resistance to anthracnose identified in two Capsicum sources

Cited by 52 publications

References 27 publications

Aphid resistance in Capsicum maps to a locus containing LRR-RLK gene analogues

Aphid resistance in Capsicum maps to a locus containing LRR-RLK gene analogues

Overview of Biotic Stresses in Pepper (Capsicum spp.): Sources of Genetic Resistance, Molecular Breeding and Genomics

Chili anthracnose: Colletotrichum taxonomy and pathogenicity

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