Divergência genética em espécies e híbridos interespecíficos de Physalis baseada em caracteres morfoagronômicos

Júnior, André Dutra Silva; Zeist, André Ricardo; Leal, Murilo Henrique Souza; Oliveira, Joana Nascimento Merces de; Oliveira, Guilherme José Almeida; Toroco, Bruno da Rocha; Silva, Daniel Fernandes da; Nogueira, Alexandre Simões

doi:10.33448/rsd-v11i2.25464

Cited by 3 publications

(2 citation statements)

References 34 publications

(36 reference statements)

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“…Under these circumstances, the low level of diversity still available in cultivated populations may be of limited agronomic importance. However, there are reports of native germplasm from other species of Physalis, or from interspecific hybrids within the genus, being used for hybridization inasmuch as they represent a source of alleles conferring resistance to viral diseases (CELy et al, 2015;SILVA-JÚNIoR et al, 2022). In addition, some studies have shown that variability within-populations is greater than between-populations; therefore, it is important to design tools that allow the evaluation of individual plants in order better to exploit intrapopulation resources (CHACÓN et al, 2016).…”

Section: Introduction Of Germplasmmentioning

confidence: 99%

Origin, evolution and strategies for the genetic improvement of physalis

et al. 2023

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Physalisperuviana L. (physalis) has significant economic potential by virtue of the unique flavor of its fruit. However, the productivity of Brazilian plantations is low because of the limited number of varieties or cultivars available. The main obstacle in the selection of superior genotypes is the lack of information about genetic variability within- and between- populations and limited genetic basis that has likely resulted from evolutionary, domestication and selection processes of the natural or artificial populations. Physalis currently cultivated in Brazil is tetraploid, and such polyploidy may have led to the reproductive isolation of the species, preventing the occurrence of intraspecific hybridization. Moreover, cultivated populations derive from a common gene pool and have undergone a long process of domestication and selection carried out empirically by farmers. In Colombia and other Andean countries there are wild populations that exhibit genetic diversity which; although, fundamental for the conservation of the species, have low potential for the development of genotypes with superior agronomic traits. In order to create and expand the genetic variability of physalis, breeders have employed various strategies including induction of mutation, chromosome duplication, and interspecific and intraspecific hybridization. Furthermore, the production of double haploid lines from in vitro anther cultures has shown good results in the selection of hybrids. The mutant genotypes and/or hybrids obtained using these methods in association with those of wide genomic selection can generate cultivars with superior agronomic traits.

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Section: Introduction Of Germplasmmentioning

confidence: 99%

Origin, evolution and strategies for the genetic improvement of physalis

et al. 2023

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“…There are also many native species of the genus physalis in the country. The introgression of the genes of these species has made it possible to expand the genetic base(Silva Júnior et al, 2022).…”

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Variabilidade e correlações entre caracteres agronômicos em populacões mutantes de physalis

et al. 2023

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As populações de physalis cultivadas no Brasil apresentam base genética restrita, o que dificulta o progresso genético da espécie. A ferramenta disponível para a obtenção de variantes é a mutação que associada aos estudos das correlações favorecem o desenvolvimento de novas cultivares. O objetivo foi caracterizar a variabilidade fenotípica em populações de physalis cultivadas e mutantes conjuntamente com a obtenção de estimativas de correlações fenotípicas e seus desdobramentos em efeitos diretos e indiretos entre caracteres de importância agronômica. Os tratamentos foram a combinação de três populações de physalis (Colômbia, Lages e Fraiburgo), submetidas à irradiação gama (Co60) em três tempos de exposição (0, 250 e 500 Grays-Gy) nas sementes. O delineamento experimental utilizado foi blocos ao acaso, com três repetições. Foram avaliados o pH, a acidez total titulável (ATT), os sólidos solúveis totais (SST, em °Brix), índice de maturação (IM, razão SST/ATT), o número de flores (NDF) e de frutos (NFR), o peso de frutos sem capulho (PDF, em g) e a produtividade total (PROD em kg ha-1). Os resultados demostraram que existe variação para as populações mutantes de physalis quando comparado as suas testemunhas (populações cultivadas) para os componentes qualitativos (acidez e sólidos totais) e não para os quantitativos. Existe correlação positiva entre acidez e sólidos totais, assim através de cruzamentos entre as populações contrastantes da seleção é possível obter genótipos com frutos de sabor mais equilibrado

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Identificación de fuentes de resistencia a <i>Fusarium oxysporum</i> en genotipos de <i>Physalis </i>sp.

Gonzalez Chavarro,

Pulido Blanco

2023

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The resistance of Cape gooseberry to Fusarium oxysporum was evaluated in 70 accessions of Physalis peruviana and related taxa (P. philadelphica, P. ixocarpa, P. floridana, P. pubescens, P. angulata, P. pruinosa, P. viscosa, P. mexicana, Nicandra physalodes, and Solanum auriculatum). These accessions were obtained from different national and international collections, including accessions from the Colombian productive sector. These represented wild materials, commercial cultivars, native and foreign weeds, and commercial ecotypes from the main producing countries: Colombia, South Africa, Kenya, and Peru. The evaluation of resistance to F. oxysporum was carried out under greenhouse conditions using the most aggressive strain supplied by the Fusarium collection maintained by the molecular microbiology laboratory of the Center for Biotechnology and Bioindustry (CBB), currently in charge of the Working Collection of Microorganisms of Agrosavia, which was isolated from infected fields. The symptoms were monitored using a severity scale, containing 10 degrees and five categories. Data information obtained from daily evaluations was analyzed through a severity evaluation and different statistical analyses. The results identified one accession belonging to Physalis peruviana and two related taxa (Physalis floridana and Solanum auriculatum) as resistant to this pathogen. These accessions could be directly used in breeding programs, either as improved cultivars or as race-specific resistance donors for other Physalis peruviana genotypes.

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Divergência genética em espécies e híbridos interespecíficos de Physalis baseada em caracteres morfoagronômicos

Cited by 3 publications

References 34 publications

Origin, evolution and strategies for the genetic improvement of physalis

Origin, evolution and strategies for the genetic improvement of physalis

Variabilidade e correlações entre caracteres agronômicos em populacões mutantes de physalis

Identificación de fuentes de resistencia a <i>Fusarium oxysporum</i> en genotipos de <i>Physalis </i>sp.

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