Comparative karyotypic analysis and cytotaxonomy in the Alstroemeria ligtu L. (Alstroemeriaceae) complex of Chile

Abstract

Artículo de publicación ISISin acceso a texto completoDue to the variability in morphology and color of the flowers as well as the excellent post-harvest durability of Alstroemeria, many species are cultivated as ornamental and cut flowers. Alstroemeria ligtu L., endemic to Chile, has also been a source of artificial hybridizations for development of new cultivars. Cytogenetic studies provide clues for possible breeding programs and taxonomically useful data to clear up infraspecific relationships of Chilean native populations. Three subspecies are recognized within A. ligtu: subsp. ligtu, subsp. splendens Munoz-Schick, and subsp. simsii (Sprengel) Bayer. The objective of this paper is to characterize karyotypically these subspecies and to clarify their taxonomic status. Fourteen populations were collected throughout its distributional range. Chromosome number, karyotypic formulae, karyotypes, ideograms, intrachromosomal asymmetry index M-CA, and interchromosomal asymmetry index CVCL were calculated. All studied populations showed 2n = 2x = 16 chromosomes. Subspecies ligtu and simsii are clearly differentiated from each other in M-CA and together from subsp. splendens with CVCL. Intrachromosomal asymmetry index revealed two populational groups within subsp. splendens. These populations also differ in karyotypes formulae, habitat, soil type, and distribution. We concluded that a fourth subspecies should be described from populations located in the lower part of the cordillera de los Andes in the Region of Maule. Populations of higher elevations correspond to those already described as subsp. splendens.Fondecyt 113034

Cytotaxonomic study of the Chilean endemic complex Alstroemeria magnifica Herb. (Alstroemeriaceae)

“…, 2009 ; Baeza et al. , 2010 , 2015 , 2016a , b ). In this case, these changes would be further supported, as cytological data is integrated and contextualized with preliminary results observed from additional character sources (chloroplast DNA, colorimetric variation and morphometry of tepals; Carrasco et al .…”

“…Traditional taxonomic treatments in Alstroemeria have largely been based on patterns of variability of their conspicuous flowers, which present tepals with a wide display of morphological and coloring patterns ( Bayer, 1987 ; Muñoz and Moreira, 2003 ). These structures, while useful for discrimination at interspecific levels, usually exhibit levels of variation beyond levels of stability required for a robust taxonomic discrimination in several groups of species ( Baeza et al , 2010 , 2015 , 2016a , b ). Therefore, since any potential development in these groups has been mostly restricted to inconclusive taxonomic interpretations the use of other possible sources of evidence, like cytological characters, could result useful to help taxonomic discrimination at intraspecific levels.…”

Water Availability and Production of Potted Alstroemeria in Greenhouse

“…The hybridization results in plants with large flowers, a variety of colors, longer shelf life, and flower stems which can reach up to two meters high (TOMBOLATO, 2010). In addition, Alstroemeria has been used worldwide as a cut flower because of its excellent vase life and high commercial value (BAEZA et al, 2016).…”

CRESCIMENTO E DESENVOLVIMENTO DA Alstroemeria x hybrida QUANDO SUBMETIDA A DIFERENTES CAPACIDADES DE RETENÇÃO DE VASO

“…A variabilidade morfológica, a ampla gama de cores das flores e a excelente durabilidade pós-colheita (BAEZA et al, 2008) da Alstroemeria resultaram em muitas espécies com elevado valor comercial, com relevância mundial como plantas ornamentais cultivadas e flores de corte (BAEZA et al, 2016).…”