Analysis of the effect of rye chromosomes 4R, 6R and telomeric heterochromatin on 7R on homologous chromosome pairing in pentaploid hybrids (AABBR, AABBD)

Gupta, P. K. ; Fedak, G. (1986) Analysis of the effect of rye chromosomes 4R, 6R and telomeric heterochromatin on 7R on homologous chromosome pairing in pentaploid hybrids (AABBR, AABBD) Theoretical and Applied Genetics, 72 (6). pp. 816-821. ISSN 0040-5752

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Official URL: http://www.springerlink.com/content/q5658r10636850...

Related URL: http://dx.doi.org/10.1007/BF00266551

Abstract

Meiotic pairing in Triticum turgidum cv. Ma (4x) with a mean chiasmata frequency of 27.16 per cell was compared with chiasmata frequencies in its hybrids with several triticale strains, 'Chinese Spring' wheat and its addition lines for 'Imperial' rye chromosomes 4R and 6R. In hybrids between 'Ma' and x Triticosecale cv. 'Rosner' the chiasmata frequency was marginally reduced by an average of 1.25%, by 8.8% in hybrids with x Triticosecale cv. 'DRIRA' HH and by 6.7% with 'DRIRA' EE (lacking 90% telomeric heterochromatin from chromosome arm 7RL). In pentaploid hybrids between 'Ma' and T. aestivum cv. 'Chinese Spring' the reduction was an average of 10.30%, while addition lines with rye chromosome 6R reduced chiasmata frequencies by an average of 7.4% and rye addition line for 4R showed the greatest depression in chiasmata frequency in hybrids by a 25.04% reduction. An interchange difference involving long chromosome segments was observed between 'Ma' and 'Rosner'.

Item Type:Article
Source:Copyright of this article belongs to Springer.
Keywords:Triticum; X Triticosecale; Secale; Rye; Meiosis; Chromosome Pairing; Heterochromatin
ID Code:74949
Deposited On:19 Dec 2011 05:38
Last Modified:19 Dec 2011 05:38

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