Progress and Prospects in Capsicum Breeding for Biotic and Abiotic Stresses

Chhapekar, Sushil Satish; Jaiswal, Vandana; Ahmad, Ilyas; Gaur, Rashmi; Ramchiary, Nirala

doi:10.1007/978-981-10-9029-5_11

Cited by 21 publications

(11 citation statements)

References 188 publications

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“…Currently, there exist several large germplasm ex situ collections of both wild and domesticated Capsicum species, particularly those maintained by the World Vegetable Center (AVRDC, Taiwan) with 8170 accessions, the United States Department of Agriculture (USDA) with 6067 entries, and the National Bureau of Plant Genetic Resources (NBPGR, India) with 2774 accessions (Chhapekar et al 2018). Universities and other institutions from 21 countries in Latin America and the Caribbean also have genebanks that conserve smaller collections of Capsicum germplasm (Knudsen 2000).…”

Section: Introductionmentioning

confidence: 99%

Microsatellites to enhance characterization, conservation and breeding value of Capsicum germplasm

Guzmán¹,

Moore

Vicente

et al. 2019

Genet Resour Crop Evol

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Capsicum species are of great economic, medicinal, culinary and cultural value worldwide, however their genetic potential is still underutilized. In this study, a set of 21 microsatellite markers showed utility for distinguishing a diverse group of 42 Capsicum genotypes representing 11 species. The level of polymorphism among these genotypes was evaluated by calculating the polymorphic information content (PIC) and discriminating power (D) for each locus. A total of 208 alleles were detected at the 21 loci evaluated. Markers detecting the highest number of alleles also exhibited the highest number of rare alleles. PIC values and D estimations showed a significant positive correlation (r = 0.98; P \ 0.0000). PIC values ranged between 0.500 (marker NG20) and 0.899 (marker NG17), giving an average of 0.775. Genetic relationships among genotypes were evaluated using UPGMA clustering, Principal Coordinate Analysis (PCoA) and Bayesian model-based clustering, allowing genotypes to be discriminated into groups according to their degree of genetic similarity corresponding to distinct taxa. Based on these analyses, the 21 microsatellite included in this study now define a standard tool for efficient assessment of molecular variability of Capsicum germplasm collections conserved worldwide.

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Section: Introductionmentioning

confidence: 99%

Microsatellites to enhance characterization, conservation and breeding value of Capsicum germplasm

Guzmán¹,

Moore

Vicente

et al. 2019

Genet Resour Crop Evol

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“…The high content of bioactive compounds, such as capsaicinoids, carotenoids (capsanthin, capsorubin, β-carotene, β-cryptoxanthin, lutein, zeaxanthin, etc. ), vitamins (C, E and provitamin A), dietary fibres and some essential mineral oils have made this vegetable crop an excellent source for protection against various chronic degenerative diseases and human health protection [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…Because Capsicum is of economic and nutritional importance, breeders have improved some agronomic traits, such as pungency, fruit shape, abiotic and biotic stress resistance. However, this leads to reduced genetic diversity of breeding lines, so some useful genes in the landraces (local forms) are lost due to the breeding activities [3]. Conservation and sustainable utilization of genetic resources are keys to the continuous Pepper (C. annuum L.); germplasm collection; microsatellite markers (SSR); genetic and phenotypic diversity; genetic structure; core collection improvement of peppers in order to respond to climate change and increasing global food demand in the successive decades.…”

Section: Introductionmentioning

confidence: 99%

Genetic diversity and population structure analysis – a prerequisite for constructing a mini core collection of Balkan Capsicum annuum germplasm

Christov

Tsonev

Todorova

et al. 2021

Biotechnology & Biotechnological Equipment

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Pepper (Capsicum annuum L.) is one of the most important vegetable crops worldwide. The Balkans, including Bulgaria, are considered as the secondary centre of pepper diversity especially for C. annuum, where local forms with diverse phenotypes and qualities have formed due to the specific agro-climatic conditions and breeding traditions. Evaluation of the genetic diversity and structure of a pepper collection is an important tool for further development of new varieties and the maintenance of sustainable agriculture. In this study, a set of 179 C. annuum accessions collected from different locations in the Balkan Peninsula was genotyped with 21 simple sequence repeat (SSR; microsatellite) markers. In total, 146 alleles were amplified among which the majority were with low frequencies (<5%). The mean He, Ho and PIC for the 21 SSR loci in the whole set were 0.531, 0.249 and 0.483, respectively. Model-based structure analysis divided the collection into 3 main clusters (K = 3) that grouped accessions with distinct fruit traits like shape, size, pungency. Further genetic structure analysis at increasing Ks suggested the presence of sub-clustering within the three main clusters. A Balkan C. annuum mini core collection was constructed based on the allelic diversity and the inferred genetic structure. As far as the mini core collection captured substantial part of the allele richness, genetic and phenotypic diversity of the analysed 176 non-redundant accessions, while maintaining good representativeness, we believe it will be of high interest to pepper breeders and germplasm conservation specialists.

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“…Brázdil et al [2] expect an increase in the air temperature in Central Europe of 1.2-1.5 • C by 2050 and 3.3 • C by 2100. As part of climate change, it is expected that the precipitation regime will change, and agricultural crops will be exposed to various forms of biotic and abiotic stress in the coming years [3,4]. Changes in the distribution of annual rainfall totals, together with the increase in temperature over the last 40 years, are causing more and longer periods of drought [5][6][7], and plants are more often exposed to water stress.…”

Section: Introductionmentioning

confidence: 99%

Water Regime Monitoring of the Royal Walnut (Juglans regia L.) Using Sap Flow and Dendrometric Measurements

Bárek

Kovacova

Kišš

et al. 2021

Plants

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Changes in the distribution of annual rainfall totals, together with the increase in temperature over the last 40 years, are causing more frequent periods of drought, and plants are more often exposed to water stress. The aim of this study was to monitor the effect of different water regimes (irrigated and non-irrigated) of individuals of walnut tree (Juglans regia L.) in a private orchard located in the West of Slovakia. Our research was focused on dendrometric and sap flow measurements in the period from 28 March to 2 June 2019. The results showed differences in the sap flow of walnut trees during the budbreak period: when trees were irrigated, sap flow in the diurnal cycle was around 130 g·h−1 (20.48%), higher than in the non-irrigated treatment. Dendrometric differences between the irrigated and non-irrigated treatments were not significant. The sap flow data in the flowering period of the irrigated variant were slightly higher at 150 g·h−1 (35.62%) than non-irrigated. Dendrometric differences were more significant when the difference between the variants was more than 1.5 mm. Continuation of this research and analysis of the data obtained in the coming years will allow us to evaluate the effects of the environment on fruit trees in the long term.

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Progress and Prospects in Capsicum Breeding for Biotic and Abiotic Stresses

Cited by 21 publications

References 188 publications

Microsatellites to enhance characterization, conservation and breeding value of Capsicum germplasm

Microsatellites to enhance characterization, conservation and breeding value of Capsicum germplasm

Genetic diversity and population structure analysis – a prerequisite for constructing a mini core collection of Balkan Capsicum annuum germplasm

Water Regime Monitoring of the Royal Walnut (Juglans regia L.) Using Sap Flow and Dendrometric Measurements

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