Chromosome numbers and ploidy levels of Paspalum species from subtropical South America (Poaceae)

被引:0
作者
Diego Hojsgaard
Ana I. Honfi
Gabriel Rua
Julio Daviña
机构
[1] Instituto de Botánica del Nordeste,Programa de Estudios Florísticos y Genética Vegetal, Facultad de Ciencias Exactas, Químicas y Naturales
[2] Consejo Nacional de Investigaciones Científicas y Técnicas,Cátedra de Botánica Agrícola, Facultad de Agronomía
[3] Universidad Nacional de Misiones,undefined
[4] Universidad de Buenos Aires,undefined
[5] Investigador Adjunto,undefined
[6] Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET),undefined
来源
Genetic Resources and Crop Evolution | 2009年 / 56卷
关键词
Chromosome races; Genetic resources; Grasses; Polyploidy;
D O I
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学科分类号
摘要
Somatic chromosome numbers of 131 accessions belonging to 55 Paspalum species from subtropical South America have been determined. All species had x = 10 as a basic chromosome number, except P. almum which had x = 6. Six ploidy levels were found among species with tetraploidy as the most frequent condition. New diploid and octoploid counts were reported. For Paspalum lilloi and P. glabrinode (both 2n = 2x = 20), and for P. ellipticum, P. erianthoides, P. ovale and P. remotum (all 2n = 8x = 80) sporophytic chromosome numbers are presented for the first time. Records that differ from previously reported counts are given for the following species: P. paucifolium (2n = 2x = 20), P. ceresia (2n = 6x = 60), P. conjugatum (2n = 6x = 60), P. alcalinum (2n = 6x = 60) and P. aff. arundinellum (2n + 1 = 5x + 1 = 51). These chromosome data are discussed in light of ploidy-level variation and implications for breeding systems within and among species.
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页码:533 / 545
页数:12
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共 151 条
  • [1] Adamowski EDV(2005)Chromosome numbers and meiotic behavior of some Genet Mol Biol 28 773-780
  • [2] Pagliarini MS(1957) accessions Rev Argent Agron 24 89-117
  • [3] Mendes Bonato AB(1956)Las especies de Stain Technol 3 87-90
  • [4] Rocha Batista LA(1975) con dos racimos conjugados en Río Grande del Sur (Brasil) Crop Sci 15 229-232
  • [5] Valls JFM(1995)Freezing by liquid carbon dioxide in making slides permanent Int J Plant Sci 156 326-331
  • [6] Barreto IL(1997)Cytology of some apomictic Crop Sci 37 1347-1351
  • [7] Bowen CC(1970) species J Hered 61 129-132
  • [8] Burson BL(1972)Genome relationship and reproductive behavior of intraspecific Can J Genet Cytol 14 609-613
  • [9] Burson BL(1982) hybrids: yellow-anthered × Uruguaiana Can J Genet Cytol 24 219-226
  • [10] Burson BL(1948)Apomixis and sexuality in some Agron J 40 443-452