Widening the genetic base of cultivated gene pool following introgression from wild <i>Lens</i> taxa

Singh, Mohar; Sharma, S. L.; Singh, Baleshwar; Malhotra, Nikhil; Chandora, Rahul; Sarker, Ashutosh; Singh, Kuldeep; Gupta, Dorin

doi:10.1111/pbr.12615

Cited by 22 publications

(23 citation statements)

References 121 publications

(211 reference statements)

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“…The studies of CWR for drought and heat tolerances are still getting underway, and expressions are yet to be confirmed in elite genetic backgrounds. Wider genetic variance for the tolerance of abiotic stresses is expected in lentil CWR compared with the domestic gene pool (Singh et al, 2018), in line with results in chickpea (Porceddu & Damania, 2015; Redden et al, 2019). The review of lentil CWR by Singh et al (2018) noted that CWR had a rich diversity of useful disease and insect resistances, tolerances to abiotic stresses of drought, heat, and salinity, and desirable traits for high grain yield.…”

Section: How To Effectively Use the Diversity Of Cwrs?mentioning

confidence: 59%

Potential and limits of exploitation of crop wild relatives for pea, lentil, and chickpea improvement

Coyne¹,

Kumar²,

Wettberg

et al. 2020

Legume Science

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Legumes represent the second most important family of crop plants after grasses, accounting for approximately 27% of the world's crop production. Past domestication processes resulted in a high degree of relatedness between modern varieties of crops, leading to a narrower genetic base of cultivated germplasm prone to pests and diseases. Crop wild relatives (CWRs) harbor genetic diversity tested by natural selection in a range of environments. To fully understand and exploit local adaptation in CWR, studies in geographical centers of origin combining ecology, physiology, and genetics are needed. With the advent of modern genomics and computation, combined with systematic phenotyping, it is feasible to revisit wild accessions and landraces and prioritize their use for breeding, providing sources of disease resistances; tolerances of drought, heat, frost, and salinity abiotic stresses; nutrient densities across major and minor elements; and food quality traits. Establishment of hybrid populations with CWRs gives breeders a considerable benefit of a prebreeding tool for identifying and harnessing wild alleles and provides extremely valuable long-term resources. There is a need of further collecting and both ex situ and in situ conservation of CWR diversity of these taxa in the face of habitat loss and degradation and climate change. In this review, we focus on three legume crops domesticated in the Fertile Crescent, pea, chickpea, and lentil, and summarize the current state and potential of their respective CWR taxa for crop improvement.

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Section: How To Effectively Use the Diversity Of Cwrs?mentioning

confidence: 59%

Potential and limits of exploitation of crop wild relatives for pea, lentil, and chickpea improvement

Coyne¹,

Kumar²,

Wettberg

et al. 2020

Legume Science

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“…The genus Lens is a self-pollinating, diploid (2n = 2x = 14), cool season legume with a large genome size of c. 4 Gbp (Singh et al, 2018). With respect to the global production, cultivated lentil is ranked third after chickpea and pea 1 .…”

Section: Introductionmentioning

confidence: 99%

“…This phenomenon is particularly valuable to broaden diversity in cultivated lentil, where domestication has reduced levels of resistance to biotic and abiotic stresses compared to its wild relatives (Wong et al, 2015;Malhotra et al, 2019). Attempts have been made to introgress desirable characters of wild lentil taxa into cultivated varieties (Singh et al, 2018). However, the cross-compatibilities and taxonomic relationships between crops and their wild relatives influences the fertility of the final progeny (Singh et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Characterization of Genetic and Allelic Diversity Amongst Cultivated and Wild Lentil Accessions for Germplasm Enhancement

et al. 2020

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Intensive breeding of cultivated lentil has resulted in a relatively narrow genetic base, which limits the options to increase crop productivity through selection. Assessment of genetic diversity in the wild gene pool of lentil, as well as characterization of useful and novel alleles/genes that can be introgressed into elite germplasm, presents new opportunities and pathways for germplasm enhancement, followed by successful crop improvement. In the current study, a lentil collection consisting of 467 wild and cultivated accessions that originated from 10 diverse geographical regions was assessed, to understand genetic relationships among different lentil species/subspecies. A total of 422,101 high-confidence SNP markers were identified against the reference lentil genome (cv. CDC Redberry). Phylogenetic analysis clustered the germplasm collection into four groups, namely, Lens culinaris/Lens orientalis, Lens lamottei/Lens odemensis, Lens ervoides, and Lens nigricans. A weak correlation was observed between geographical origin and genetic relationship, except for some accessions of L. culinaris and L. ervoides. Genetic distance matrices revealed a comparable level of variation within the gene pools of L. culinaris (Nei's coefficient 0.01468-0.71163), L. ervoides (Nei's coefficient 0.01807-0.71877), and L. nigricans (Nei's coefficient 0.02188-1.2219). In order to understand any genic differences at species/subspecies level, allele frequencies were calculated from a subset of 263 lentil accessions. Among all cultivated and wild lentil species, L. nigricans exhibited the greatest allelic differentiation across the genome compared to all other species/subspecies. Major differences were observed on six genomic regions with the largest being on Chromosome 1 (c. 1 Mbp). These results indicate that L. nigricans is the most distantly related to L. culinaris and additional structural variations are likely to be identified from genome sequencing studies. This would provide further insights into evolutionary relationships between cultivated and wild lentil germplasm, for germplasm improvement and introgression.

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“…Целенаправленно дикие виды включены в селекционные программы в Канаде, где ведутся исследования по интрогрессии генов устойчивости к антракнозу L. ervoides в геном культурной чечевицы (Tullu et al, 2010). В Индии созданы инбредные селекционные линии, полученные в результате межвидовой гибридизации (Singh et al, 2018). Несмотря на многочисленные попытки скрещиваний диких видов с культурным, в практику селекции они не вошли: в мире не было сортов чечевицы, созданных с участием ДРКР.…”

Section: чечевица (Lens Culinarisunclassified

“…Несмотря на многочисленные попытки скрещиваний диких видов с культурным, в практику селекции они не вошли: в мире не было сортов чечевицы, созданных с участием ДРКР. Одна из главных причин этого -длинный селекционный цикл, обусловленный необходимостью избавления от нежела-тельных генов, ассоциированных с интрогрессируемыми признаками (Singh et al, 2018).…”

Section: чечевица (Lens Culinarisunclassified

Species Diversity of the Vir Collection of Grain Legume Genetic Resources and Its Use in Domestic Breeding

Vishnyakova

Александрова

Buravtseva

et al. 2019

Trudy po prikladnoy botanike, genetike i selektsii

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The world’s genebanks hold 7.5 million germplasm accessions of plant genetic resources (PGR). One of the qualitative characteristics of the PGR collections is the species diversity, in particular, the presence of crop wild relatives (CWR), which makes it possible to widen the use of gene pools in the breeding process. The collection of the Vavilov Institute (VIR) is one of the most diverse holdings in the number of plant species. A survey is provided here of the species diversity in VIR’s grain legume collection, and its use in domestic breeding practice is analyzed. Comparison of this diversity with the state of PGR exploitation in the world makes it possible to assess the prospects of more efficient utilization of gene pool potential, especially for species that are unjustifiably cultivated on a too small scale or even neglected as crops in this country. The VIR collection of grain legumes incorporates 196 species from 9 genera of the family Fabaceae. This number includes cultigens and CWR. The cultivars of 21 species of grain legumes listed in the State Register of Breeding Achievements (2018) are adapted to the soil and climate conditions of this country. However, the species diversity of the collection could be used more efficiently in domestic plant breeding and crop production. This concerns both underutilized crops in Russia (broad beans, lima beans and grass pea) and those whose adaptive potential is adjusted only to certain and limited areas of the Russian Federation (Tepary beans and Vigna spp.). It is also necessary to exploit more efficiently species of the wild flora, both for direct utilization as pastures, green manure or phytoremediation crops and for introgressive breeding and domestication (Vicia benghalensis L., V. narbonensis L., Lathyrus sylvestris L., Lupinus hartwegii Lindl., etc.). Incorporation of crop wild relatives into the breeding process is promising for crop improvement in a number of aspects: for example, to increase resistance to diseases, pests, abiotic stressors, etc.

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Widening the genetic base of cultivated gene pool following introgression from wild Lens taxa

Cited by 22 publications

References 121 publications

Potential and limits of exploitation of crop wild relatives for pea, lentil, and chickpea improvement

Potential and limits of exploitation of crop wild relatives for pea, lentil, and chickpea improvement

Characterization of Genetic and Allelic Diversity Amongst Cultivated and Wild Lentil Accessions for Germplasm Enhancement

Species Diversity of the Vir Collection of Grain Legume Genetic Resources and Its Use in Domestic Breeding

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