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Genomic constitution of the allo-octoploid Elymus tenuis (Poaceae: Triticeae) of New Zealand

Genomic constitution of the allo-octoploid Elymus tenuis (Poaceae: Triticeae) of New Zealand Elymus tenuis (Buch.) Á.Löve et Connor is a perennial octoploid (2 n = 56) wheatgrass endemic to New Zealand. To investigate its genomic constitution, four artificial interspecific hybrids between E. tenuis and E. enysii (2 n = 4 x = 28, HW), and E. solandri (2 n = 6 x = 42, StYW) and E. multiflorus (2 n = 6 x = 42, StYW) were studied cytologically. Meioses in pollen mother cells (PMCs) of the hybrids showed relatively high chromosome pairing, with an average of 13.50 in E. enysii × E. tenuis , 20.22 in E. solandri × E. tenuis , 19.62 in E. multiflorus × E. tenuis , and 20.00 in E. tenuis × E. multiflorus bivalents per cell, respectively. The results indicate that E. tenuis is an allo-octoploid species, with the new and unique genomic constitution StYHW. An autochthonous origin is proposed for it. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Australian Systematic Botany CSIRO Publishing

Genomic constitution of the allo-octoploid Elymus tenuis (Poaceae: Triticeae) of New Zealand

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References (20)

Publisher
CSIRO Publishing
Copyright
CSIRO
ISSN
1030-1887
eISSN
1446-4701
DOI
10.1071/SB10014
Publisher site
See Article on Publisher Site

Abstract

Elymus tenuis (Buch.) Á.Löve et Connor is a perennial octoploid (2 n = 56) wheatgrass endemic to New Zealand. To investigate its genomic constitution, four artificial interspecific hybrids between E. tenuis and E. enysii (2 n = 4 x = 28, HW), and E. solandri (2 n = 6 x = 42, StYW) and E. multiflorus (2 n = 6 x = 42, StYW) were studied cytologically. Meioses in pollen mother cells (PMCs) of the hybrids showed relatively high chromosome pairing, with an average of 13.50 in E. enysii × E. tenuis , 20.22 in E. solandri × E. tenuis , 19.62 in E. multiflorus × E. tenuis , and 20.00 in E. tenuis × E. multiflorus bivalents per cell, respectively. The results indicate that E. tenuis is an allo-octoploid species, with the new and unique genomic constitution StYHW. An autochthonous origin is proposed for it.

Journal

Australian Systematic BotanyCSIRO Publishing

Published: Nov 3, 2010

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