potencial de obtenção de novos porta-enxertos em cruzamentos envolvendo limoeiro 'cravo', laranjeira 'azeda', tangerineira 'sunki' e híbridos de poncirus trifoliata potential of obtaining new rootstocks in crosses among 'rangpur' lime, 'sour' orange, 'sunki' mandarin and poncirus trifoliata

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ID: 215750
2008
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Abstract
O limoeiro 'Cravo' e a laranjeira 'Azeda' são importantes porta-enxertos de citros. Com o objetivo de explorar seu potencial genético, distintas seleções de limoeiro 'Cravo', empregadas como parentais femininos, foram cruzadas com seleções de laranjeira 'Azeda', tangerineira 'Sunki Maravilha' e híbridos de Poncirus trifoliata. Semelhantemente, seleções de 'Azeda' foram hibridadas com seleções de 'Cravo' e híbridos de P. trifoliata. Avaliaram-se a taxa de vingamento de frutos, a porcentagem de híbridos no conjunto total de indivíduos obtidos (zigóticos e nucelares), a altura e o diâmetro do caule destes, em torno dos 12 meses de idade. O cruzamento entre limoeiro 'Cravo', seleções comum e 'Santa Cruz', com tangerineira 'Sunki 'Maravilha' resultou nas maiores taxas de vingamento de frutos (média de 87,5%) e maior percentual de híbridos (média de 64,0%), sendo estes relativamente vigorosos, segundo comparações com seedlings nucelares desse limoeiro. Quanto às hibridações envolvendo a laranjeira 'Azeda', mostraram-se promissoras 'Azeda Jacarandá' x (tangerineira 'Cleópatra' x P. trifoliata seleção 'Swingle 245'), pela relativamente elevada taxa de vingamento de frutos (50%), boa porcentagem de híbridos (32,3%) e possibilidade de obtenção de híbridos vigorosos, e laranjeira 'Azeda' comum x limoeiro 'Cravo' seleções comum e 'Santa Cruz', pela possibilidade de obtenção de híbridos vigorosos e em quantidades relativamente altas, em torno de 40% de plantas híbridas.
'Rangpur' lime and 'Sour' orange are important citrus rootstocks. Aiming to explore their genetic potential, several 'Rangpur' lime selections, as female parents, were crossed with 'Sour' orange selections, 'Sunki Maravilha' mandarin and Poncirus trifoliata hybrids. In the same way, 'Sour' orange selections were crossed with 'Rangpur' lime selections and P. trifoliata hybrids. Parameters evaluated were: fruit set, percentage of hybrids out of the total number of seedlings (zygotes and nucellars), stem height and diameter of the hybrids at 12 months of age. The common and 'Santa Cruz' selections of 'Rangpur' lime x 'Sunki Maravilha' mandarin had the highest fruit set (87.5% on average) and the highest percentage of hybrids (64.0% on average), which were relatively vigorous compared to 'Rangpur' lime seedlings of nucellar origin. With regard to the hybridization with 'Sour' oranges, the 'Jacarandá' sour orange x ('Cleopatra' mandarin x P. trifoliata 'Swingle 245' selection) was promising, due to the relatively high fruit set (50%), good percentage of hybrids (32.3%) and the possibility of obtaining vigorous hybrids, and also common 'Sour' orange x 'Rangpur' lime common and 'Santa Cruz' selections for the possibility of obtaining vigorous hybrids in relatively high amounts, around 40%.
Reference Key
filho2008revistapotencial Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Walter dos Santos Soares Filho;Carlos Alberto da Silva ledo;Antônio da Silva Souza;Orlando Sampaio Passos;Matheus Pires Quintela;Lorenna Alves Mattos
Journal technocom
Year 2008
DOI
10.1590/S0100-29452008000100041
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452008000100041
Keywords
melhoramento genético

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