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Phenotypic and genomic characterization of vine cactus collection (Cactaceae)

机译：葡萄仙人掌集合（仙人掌科）的表型和基因组学表征

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摘要

Hylocereus (Berger) Britton et Rose, Selenicereus (Berger) Britton et Rose and Epiphyllum Haw. species have commercial potential as exotic fruit crops in semi-arid 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 (2C-values), stomatal length and density, potential yield and reproductive parameters in 64 Hylocereus, Selenicereus and Epiphyllum accessions. Nuclear DNA content ranged from 3.21 pg for S. grandiflorus (L.) Britton et Rose spp. grandiflorus to 8.77 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.
机译：Hylocereus（Berger）Britton et Rose，Selenicereus（Berger）Britton et Rose和Epiphyllum Haw。该物种在半干旱和干旱地区具有作为异国水果作物的商业潜力。这些物种之间的高遗传变异性为商业化种植提供了机会。为此，我们调查了64个Hylocereus，Selenicereus和Epiphyllum种质的基因组和形态特征，包括：核DNA含量（2C值），气孔长度和密度，潜在产量和生殖参数。 S. grandiflorus（L.）Britton et Rose spp。的核DNA含量范围为3.21 pg。 H. megalanthus（Vaup。）Bauer的大花到8.77 pg。除四倍体H. megalanthus和S. vagans（Bgek。）Britton et Rose外，所有物种均为二倍体。气孔长度和密度，果实重量，潜在产量，每个果实的可存活种子数和果实成熟时间在种质之间高度变化。在气孔长度，密度和核DNA含量之间，以及在果实重量和种子数量之间均未发现显着相关性。在这里的种质之间发现的高遗传变异性为保存和驯化这些外来物种的优良前景提供了进一步的支持。

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