Influência da polinização sobre o número de sementes do tangor-'Murcote'

Azevedo, Fernando Alves de; Pio, Rose Mary

doi:10.1590/s0100-29452002000200037

Cited by 6 publications

(3 citation statements)

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“…Em plantas cítricas, pode ocorrer tanto a autopolinização quanto a polinização cruzada, onde o pólen é transportado por insetos, ou pelo vento (REUTHER et al, 1968;LIM, 2001). No entanto, o vento é considerado um agente polinizador de mínima importância, uma vez que o pólen dos citros é viscoso, aderente e bastante pesado (SOLER, 1996, citado por AZEVEDO;PIO, 2002). Dentre os insetos que visitam as flores de Citrus, a maioria é da ordem Hymenoptera, onde as abelhas são responsáveis por cerca de 80% dessas visitas (McGREGOR, 1976 .…”

Section: Introductionunclassified

Diversidade de abelhas visitantes das flores de Citrus em pomares de laranjeira e tangerineira

Nascimento

Pérez‐Maluf

Guimarães³

et al. 2011

Rev. Bras. Frutic.

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RESUMO-A presença de abelhas em culturas de valor comercial, no período de florescimento, é importante não apenas para garantir a polinização cruzada, quando indispensável, mas também para incrementar a produção de frutos e sementes. Nessa perspectiva, o presente trabalho teve a finalidade de identificar as abelhas visitantes das flores em pomar de laranjeira (Citrus sinensis) e tangerineira (Citrus reticulata) em Salinas -MG. O trabalho foi conduzido na fazenda experimental Santa Isabel, da Escola Agrotécnica Federal de Salinas -MG, em pomares de laranjeira com as variedades, pera, baía e baianinha, e de tangerineira, variedade poncã. As coletas das abelhas visitantes das culturas da laranjeira e tangerineira foram feitas nas floradas principais, entre os meses de agosto e outubro. Foram coletadas as abelhas que visitaram as flores nos horários entre 06 h e 18 h, totalizando 52 horas na laranjeira e 50 horas na tangerineira. No pomar de laranjeira, foram coletados 5.045 espécimes com riqueza de 12 espécies, e na tangerineira, 1.428 espéci-mes com 20 espécies. As espécies de abelhas de maior predominância e dominância em todos os horários amostrados foram Apis mellifera e Trigona spinipes na cultura da laranjeira e A. mellifera, T. spinipes e Tetragonisca angustula na cultura da tangerineira. Termos para indexação: Apidae, Estrutura de comunidades, Rutaceae. DIVERSITY OF FLOWERS VISITING BEES OF Citrus IN SALINAS, STATE OF MINAS GERAISABSTRACT -The presence of bees on cultures with commercial value during flowering is important to ensure the cross-pollination, when necessary, but also to increase the production of fruits and seeds. This work aimed to identify flowers' visiting bees on orange and tangerine orchards in Salinas -MG. The work was leaded on Santa Isabel experimental farm of the Federal Agro-technical School of Salinas -MG, on orange orchards (Citrus sinensis) with pear, bahia and baianinha varieties in the spacing of 5,0 x 6,0, and on tangerine orchards (C. reticulate) using poncã variety in the spacing of 5,0 x 5,0. The sampling of visiting bees from orange and tangerine orchards was made during the main flowerings, between August and October. The bees that visited the flowers between 06:00 a.m. and 06:00 p.m. were collected. 5045 bees were collected with richness of 12 species in orange and 1428 bees with richness of 20 species in tangerine. The species of bees with major predominance and dominance in all sampled times were Apis mellifera and Trigona spinipes (orange) and Apis mellifera, Trigona spinipes e Tetragonisca angustula (tangerine).

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Section: Introductionunclassified

Diversidade de abelhas visitantes das flores de Citrus em pomares de laranjeira e tangerineira

Nascimento

Pérez‐Maluf

Guimarães³

et al. 2011

Rev. Bras. Frutic.

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“…Similar results were observed in other studies. Azevedo and Pio (2002) reported in their research with Murcott tangor that no fruit setting took place in flowers with no pollination, which suggests the variety does not produce parthenocarpic fruits. Thus, it can be suggested that this variety also does not have the capacity of producing fruits without pollination.…”

Section: Resultsmentioning

confidence: 95%

“…Nonetheless, the presence of plants of other varieties close to the relevant ones may undesirably increase that number (GUARDIOLA, 1992). Azevedo and Pio (2002), when studying the influence of pollination in Murcott tangor, observed that, when flowers of that variety were pollinated with Valência and Natal sweet oranges, the number of seeds increased when compared with pollination with Ponkan mandarin, Pera sweet orange, and self-pollination. Some species, however, do not need fertilization to form fruits, a phenomenon called parthenocarpy, in which the fruits formed with no pollination and they have no seeds.…”

Section: Introductionmentioning

confidence: 99%

Number of seeds in fruits and frequency of hybrids obtained in crossings with IAC 2019 Maria mandarin

et al. 2022

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The Citrus Breeding Program of the Citriculture Center at the Agronomic Institute (IAC) has developed a mandarin cultivar IAC 2019Maria from the crossing between Murcott IAC tangor (Citrus reticulata x Citrus sinensis) and Pera IAC sweet orange (C. sinensis). The present study aimed to assess the number of seeds in fruits of IAC 2019Maria mandarin and to identify zygotic embryos and triploid plants in the crossings between IAC 2019Maria mandarin, Pera IAC sweet orange, and Ponkan mandarin (C. reticulata Blanco), in addition to IAC 2019Maria mandarin in open and self-pollination. IAC 2019Maria flowers were self-pollinated, pollinated with pollen from Pera sweet orange and Ponkan mandarin, and had no pollination. The embryos were identified using microsatellite molecular markers and ploidy was assessed by flow cytometry. The results of the treatment with no pollination suggest the variety does not produce parthenocarpic fruits. The genotyping results showed that 100% of the populations consist of zygotic embryos, suggesting that IAC 2019Maria mandarin is a plant with low polyembryony. The ploidy analysis of the hybrids allowed identifying a triploid plant from an aborted seed from the crossing with Pera sweet orange and two tetraploids, one from the crossing with Pera sweet orange and one from self-pollination.

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Bee pollination services and the enhancement of fruit yield associated with seed number in self-incompatible tangelos

Santos

Carneiro

Santos

et al. 2021

Scientia Horticulturae

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Influência da polinização sobre o número de sementes do tangor-'Murcote'

Cited by 6 publications

References 1 publication

Diversidade de abelhas visitantes das flores de Citrus em pomares de laranjeira e tangerineira

Diversidade de abelhas visitantes das flores de Citrus em pomares de laranjeira e tangerineira

Number of seeds in fruits and frequency of hybrids obtained in crossings with IAC 2019 Maria mandarin

Bee pollination services and the enhancement of fruit yield associated with seed number in self-incompatible tangelos

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