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- W2493817607 abstract "Polyploid features in some derivatives of Disa hybrids prompted an investigation of their chromosome numbers and those of their hybrid parents, the parental species, and a few close relatives. Disa uniflora Berg. has 2n = 36; D. cardinalis Linder, D. racemosa L.f., D. tripetaloides (L.f.) N.E. Br. ssp. aurata and D. venosa Sw. have 2n = 38, whereas D. sagittalis (L.f.) Sw. and D. uncinata H. Bolus have 2n = 40. D. tripetaloides ssp. tripetaloides from Joubertsgat is a natural triploid with 2n = 57. Two of the hybrid derivatives, viz. Disa Betty’s Bay ‘Helderberg’ and Disa Diores ‘Colette’ are near tetraploids with 2n = 68, whereas three others, viz. Disa Foam ‘Jeanette’, Disa Helmut Meyer ‘Pat’ and Disa Unimeyer ‘Apricot’ are near triploids with 2n = 48, 54 and 52 respectively. The hybrids and especially their robust polyploid derivatives are most attractive and are ideal for the cut-flower industry. Die poliploïede kenmerke van sommige Disa-hibriede se nakomelinge het aanleiding gegee tot ’n sitogenetiese studie van hierdie plante, hul hibriedouers, die spesies wat in die kruisings gebruik is, en ’n paar ander Disa-soorte. Disa uniflora Berg. het 2n = 36; D. cardinalis Linder, D. racemosa L.f., D. tripetaloides (L.f.) N.E. Br. ssp. aurata en D. venosa Sw. het 2n = 38, terwyl D. sagittalis (L.f.) Sw. en D. uncinata H. Bolus se chromosoomgetal 2n = 40 is. D. tripetaloides ssp. tripetaloides van Joubertsgat is ’n natuurlike triploïed met 2n = 57. Twee van die hibriedderivate, nl. Disa Betty’s Bay ‘Helderberg’ en Disa Diores ‘Collette’ is bykans tetraploïed met 2n = 68, terwyl drie ander, nl. Disa Foam ‘Jeanette’, Disa Helmut Meyer ‘Pat’ en Disa Unimeyer ‘Apricot’ bykans triploïed is met onderskeidelik 2n = 48, 54 en 52. Die hibriede en veral hul poliploïede derivate is besonder aantreklik en behoort ’n groot aanwins vir die snyblombedryf te wees." @default.
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- W2493817607 date "1989-08-01" @default.
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- W2493817607 title "Chromosome numbers of various Disa species and their interspecific and complex hybrids" @default.
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- W2493817607 doi "https://doi.org/10.1016/s0254-6299(16)31161-9" @default.
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