Phenotypic and genomic characterization of vine ca

Authors: N TelZur Y Mizrahi A Cisneros J Mouyal B Schneider J J Doyle

Publish Date: 2010/12/09

Volume: 58, Issue: 7, Pages: 1075-1085

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Abstract

Hylocereus Berger Britton et Rose Selenicereus Berger Britton et Rose and Epiphyllum Haw species have commercial potential as exotic fruit crops in semiarid and arid lands The high genetic variability among these species offers an opportunity for commercial cultivation Toward this end we investigated genomic and morphological characteristics including nuclear DNA content 2Cvalues stomatal length and density potential yield and reproductive parameters in 64 Hylocereus Selenicereus and Epiphyllum accessions Nuclear DNA content ranged from 321 pg for S grandiflorus L Britton et Rose spp grandiflorus to 877 pg for H megalanthus Vaup Bauer All species were diploid except the tetraploids H megalanthus and S vagans Bgek Britton et Rose Stomatal length and density fruit weight potential yields number of viable seeds per fruit and fruit maturation times were highly variable among accessions No significant correlations were found between stomatal length density and nuclear DNA content nor between fruit weight and seed number The high genetic variability found between the accessions here provides further support for the excellent prospects of conserving and domesticating these exotic species

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