Wild Potato Genetic Resources Conserved in Southern Brazil: Current Knowledge and Future Perspectives

Castro, C. M.; Pereira, André; Costa, Da; Choer, Eva; Augustin, E.; Gomes, C.B.; Campos, A. D. S. de; Pedroso, Rui; Garrastazú, M. C.; Barbieri, Rosa Lía; Mentz, L.; Viégas, Julio

doi:10.17660/actahortic.2007.745.18

Cited by 3 publications

(1 citation statement)

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“…In Brazil, efforts have been put into the collection and ex situ conservation of the germplasm of native species related to important crops predominantly since the second half of the last century [6]. After the creation of Embrapa Genetic Resources and Biotechnology in the 1970s, a program for botanical exploration and the collection of germplasm was established, and many collecting expeditions were carried out for native species related to multiple crops, such as cassava [6,7], pineapples, cashew nuts, peanuts, chili-peppers, rubber trees, forest species, medicinal plants, forage legumes, ornamental plants, palm trees, rice [6], and potatoes [8], among others.…”

Section: Introductionmentioning

confidence: 99%

Status of the Ex Situ and In Situ Conservation of Brazilian Crop Wild Relatives of Rice, Potato, Sweet Potato, and Finger Millet: Filling the Gaps of Germplasm Collections

et al. 2021

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This study presents the status of ex situ and in situ conservation for the crop wild relatives of rice, potato, sweet potato, and finger millet in Brazil, and the subsequent germplasm collection expeditions. This research is part of a global initiative entitled “Adapting Agriculture to Climate Change: Collecting, Protecting, and Preparing Crop Wild Relatives” supported by the Global Crop Diversity Trust. Species of the primary, secondary, and tertiary gene pools with occurrences reported in Brazil were included: Oryza alta Swallen, O. grandiglumis (Döll) Prod., O. latifolia Desv., O. glumaepatula Steud., Eleusine tristachya (Lam.) Lam., E. indica (L.) Gaertn., Solanum commersonii Dunal, S. chacoense Bitter, Ipomoea grandifolia (Dammer) O’Donell, I. ramosissima (Poir.) Choisy, I. tiliacea (Willd.) Choisy, I. triloba L., and I. cynanchifolia Meisn. The status of the ex situ and in situ conservation of each taxon was assessed using the gap analysis methodology, and the results were used to plan 16 germplasm collection expeditions. Seeds of the collected material were evaluated for viability, and the protocols for seed germination and cryopreservation were tested. The final conservation score, resulting from the gap analysis and including the average of the ex situ and in situ scores, resulted in a classification of medium priority of conservation for all the species, with the exception of I. grandifolia (high priority). The total accessions collected (174) almost doubled the total accessions of these crop wild relatives incorporated in Embrapa’s ex situ conservation system prior to 2015. In addition, accessions for practically absent species were collected for the ex situ conservation system, such as Ipomoea species, Eleusine indica, and Solanum chacoense. The methods used for dormancy breaking and low temperature conservation for the Oryza, Eleusine, and Ipomoea species were promising for the incorporation of accessions in the respective gene banks. The results show the importance of efforts to collect and conserve ex situ crop wild relatives in Brazil based on previous gap analysis. The complementarity with the in situ strategy also appears to be very promising in the country.

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Section: Introductionmentioning

confidence: 99%

Status of the Ex Situ and In Situ Conservation of Brazilian Crop Wild Relatives of Rice, Potato, Sweet Potato, and Finger Millet: Filling the Gaps of Germplasm Collections

et al. 2021

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Molecular marker diversity and bacterial wilt resistance in wild Solanum commersonii accessions from Uruguay

et al. 2008

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Solanum commersonii is a wild tuber-bearing species native to Uruguay with high potential for use in potato breeding programs. Little is known about the genetic diversity within this wild species and the relationship with the resistance to the bacterial pathogen Ralstonia solanacearum. We studied 30 S. commersonii clonal accessions, 20 of which were collected from geographically diVerent areas across the country, while the other ten were grown from seeds from a single plant. Resistance against R. solanacearum was tested and diVerent levels of resistance were found, ranging from delayed wilting to asymptomatic reactions. The genetic variation and the relationships among individuals in this germplasm collection were studied by diVerent molecular markers: Random AmpliWed Polymorphic DNA (RAPD), AmpliWed Fragment Length Polymorphism (AFLP) and Microsatellites or Simple Sequence Repeats (SSR). AFLP markers generated the largest number of total and polymorphic fragments per assay unit while SSR revealed the highest frequency of polymorphic bands (100%), followed by AFLP (96.2%) and RAPD (89.4%). In contrast, when comparing the number of diVerent genetic proWles generated, the SSR markers exhibited the lowest discriminatory power. The clustering pattern obtained with the three marker systems showed a similar distribution of the S. commersonii germplasm revealing a high correlation between the three methods employed. All three dendrograms grouped most of the accessions into two main clusters, containing the same accessions regardless of the marker type. Bacterial wilt resistant accessions were present in both clusters. Accessions originated from diVerent seeds of the same plant were grouped within one of the major clusters, and diVered in the response to R. solanacearum revealing segregation of resistance. Furthermore, the distribution in two main clusters showed high correspondence with the geographical origin of the accessions, from the north and south of the country, and with the subspecies malmeanum and commersonii morphologically identiWed.

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Potencialidades da região do Pampa Gaúcho para o turismo rural

Sarmento

2019

Ágora

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Esta pesquisa objetivou investigar o potencial da região do Pampa Gaúcho para o turismo rural. Realizou-se uma pesquisa qualitativa exploratória sobre o potencial turístico dos municípios compreendidos nesta região. Foi realizada uma pesquisa documental inicial seguida de visitas aos municípios. Com base na pesquisa documental e visita aos municípios selecionou-se as atrações potenciais para o turismo regional. As atrações foram separadas em quatro categorias: a)ambiental-paisagístico; b)histórico-arquitetônico; c)econômico-produtivo e, d)sociocultural. Bagé e Caçapava do Sul tiveram o maior número de atrações selecionadas, embora todos os municípios tenham contribuído com pelo menos uma atração. A região do Pampa Gaúcho apresenta grande potencial turístico. O turismo regional mostra-se, dessa forma, como excelente alternativa de geração de renda, empregos, agregação de valor aos produtos e valorização da identidade do gaúcho, constituindo-se em uma forma inovadora de desenvolvimento regional sustentável.

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Wild Potato Genetic Resources Conserved in Southern Brazil: Current Knowledge and Future Perspectives

Cited by 3 publications

References 0 publications

Status of the Ex Situ and In Situ Conservation of Brazilian Crop Wild Relatives of Rice, Potato, Sweet Potato, and Finger Millet: Filling the Gaps of Germplasm Collections

Status of the Ex Situ and In Situ Conservation of Brazilian Crop Wild Relatives of Rice, Potato, Sweet Potato, and Finger Millet: Filling the Gaps of Germplasm Collections

Molecular marker diversity and bacterial wilt resistance in wild Solanum commersonii accessions from Uruguay

Potencialidades da região do Pampa Gaúcho para o turismo rural

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