Genetic Resources of Capsicum

Barchenger, Derek W.; Ponnam, Naresh; Kumar, Sanjeet

doi:10.1007/978-3-319-97217-6_2

Cited by 20 publications

(18 citation statements)

References 95 publications

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“…The genetic and phenotypic diversity across the genus is significant, and thus represents a valuable resource for crop improvement [ 2 ]. The primary limitations to improving productivity and quality of Capsicum are abiotic and biotic stresses, many of which lack sources of host tolerance or resistance [ 3 ]. Furthermore, as a widely consumed crop with cultural and culinary value across global cuisines, there is high demand for Capsicum [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

Reproductive compatibility in Capsicum is not necessarily reflected in genetic or phenotypic similarity between species complexes

et al. 2021

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Wild relatives of domesticated Capsicum represent substantial genetic diversity and thus sources of traits of potential interest. Furthermore, the hybridization compatibility between members of Capsicum species complexes remains unresolved. Improving our understanding of the relationship between Capsicum species relatedness and their ability to form hybrids is a highly pertinent issue. Through the development of novel interspecific hybrids in this study, we demonstrate interspecies compatibility is not necessarily reflected in relatedness according to established Capsicum genepool complexes. Based on a phylogeny constructed by genotyping using simple sequence repeat (SSR) markers and with a portion of the waxy locus, and through principal component analysis (PCA) of phenotypic data, we clarify the relationships among wild and domesticated Capsicum species. Together, the phylogeny and hybridization studies provide evidence for the misidentification of a number of species from the World Vegetable Center genebank included in this study. The World Vegetable Center holds the largest collection of Capsicum genetic material globally, therefore this may reflect a wider issue in the misidentification of Capsicum wild relatives. The findings presented here provide insight into an apparent disconnect between compatibility and relatedness in the Capsicum genus, which will be valuable in identifying candidates for future breeding programs.

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Section: Introductionmentioning

confidence: 99%

Reproductive compatibility in Capsicum is not necessarily reflected in genetic or phenotypic similarity between species complexes

et al. 2021

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“…Chile pepper (Capsicum annuum L.) is consumed worldwide, and global production was 5.1 million tons in 2018, with approximately 65% of production occurring in Asia [1]. The primary limitations to improving the productivity and quality of chile pepper are abiotic and biotic stresses, many of which lack sources of host tolerance or resistance for breeding [2]. Maximum chile pepper yields occur when daily temperatures range between 18 and 32 • C during fruit set [3].…”

Section: Introductionmentioning

confidence: 99%

Growing Environment and Heat Treatment Effects on Intra- and Interspecific Pollination in Chile Pepper (Capsicum spp.)

Lin

Wang

et al. 2021

Agronomy

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Heat tolerance is important for the sustainable production of many crops, including chile pepper. Tolerance to high temperature is complex and involves various component traits, with pollen viability being among the most important. in vitro pollen assays for heat tolerance have been widely used in chile pepper; however, associations between the pollen treatment and pollination have not been widely explored. The objectives of this study were to validate the utility of in vitro heat stress pollen characterization through in vivo pollination during summer and winter seasons and to evaluate the cross-compatibility among wild and domesticated species to initiate introgression population development. Seven entries of wild and domestic Capsicum species grown during the summer and winter seasons were used to evaluate pollination success rate. Pollen was either used directly or treated at 38 °C for four hours before making reciprocal self- and cross-pollination among all the entries. Significant associations between in vitro pollen treatment and pollination success rate during summer and winter seasons were identified. Heat treatment was a greater contributor to variability than the growing environment, which validates previous reports on the usefulness of studying pollen in vitro in selection for heat tolerance. Accessions of the wild progenitor C. annuum var glabriusculum, PBC 1969 and PBC 1970, were identified as a potential heat-tolerant source for use in breeding and future research. This work provides a basis for future research in exploring additional heat tolerance components as well as for the development of phenotyping assays for pollen or other floral traits.

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“…Capsicum possesses abundant genetic resources and a rich gene pool (Barchenger et al, 2019), with several mutant populations and germplasm collections available for genetic and breeding studies (Paran et al, 2007;Jeong et al, 2012;Arisha et al, 2015;Gu et al, 2019;Pereira-Dias et al, 2019;Solomon et al, 2019;Siddique et al, 2020). Capsicum annuum is the most important species economically, and breeding programs have focused mainly on improving its resistance to pests and diseases.…”

Section: A Genetic and Genomic Resourcesmentioning

confidence: 99%

Genomics and Marker-Assisted Improvement of Vegetable Crops

Šimko

Jia

Venkatesh

et al. 2021

Critical Reviews in Plant Sciences

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Vegetables are an integral part of the human diet worldwide. Traditional breeding approaches have been used extensively to develop new cultivars of vegetables with desirable characteristics, including resistance/tolerance to biotic and abiotic stresses, high yield, and an elevated content of compounds beneficial to human health. The technological progress since the early 1980s has revolutionized our ability to study and manipulate genetic variation in crop plants. The development of high-throughput sequencing platforms and accompanying analytical methods have led to sequencing and assembly of a large number of plant genomes, construction of dense and ultra-dense molecular linkage maps, identification of structural variants, and application of molecular markers in breeding programs. Linkage mapping and genome-wide association mapping studies have been used to identify chromosomal locations of genes and QTLs associated with plant phenotypic variations important for crop improvement. This review provides up-to-date information on the status of genomics and marker-assisted improvement of vegetable crops with the focus on tomato, pepper, eggplant, lettuce, spinach, cucumber, and chicory. For each vegetable crop, we present the most recent information on genetic resources, mapping populations, genetic maps, genome sequences, mapped genes and QTLs, the status of marker-assisted selection and genomic selection, and discuss future research prospects and application of novel techniques and approaches.

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Genetic Resources of Capsicum

Cited by 20 publications

References 95 publications

Reproductive compatibility in Capsicum is not necessarily reflected in genetic or phenotypic similarity between species complexes

Reproductive compatibility in Capsicum is not necessarily reflected in genetic or phenotypic similarity between species complexes

Growing Environment and Heat Treatment Effects on Intra- and Interspecific Pollination in Chile Pepper (Capsicum spp.)

Genomics and Marker-Assisted Improvement of Vegetable Crops

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