Indian Society of Genetics & Plant Breeding

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ANALYSIS OF MEIOTIC PAIRING IN HYBRIDS OF COMMON WHEAT WITH THREE ALIEN SPECIES

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Meiotic analysis based on mathematical models was carried out to investigate genomic
relationships in some tetraploid and pentaploid wheat Fl hybrids. High optimized value
of x (relative affinity) and observed value of c (chromosome arm pairing frequency) below
0.5 in the tetraploid hybrids of Triticum aestivum (2n=42) with Aegilops mutica (2n=14) and
Thinopyrum bessarabicum (2n=14) indicated that there were no chromosomal homologies
between the genomes of T. aestivum and Ae. mutica and between those of T. aestivum and
Th. bessarabicum. The study also revealed that there are no homologous genomes present
between T. aestivum and the tetraploid Aegilops variabilis (2n=28).
 

Keywords: Relative affinity, meiotic analysis, Aegilops mutica, Ae. variabilis, Thinopyrum bessarabicum.

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Year: 1992
Volume: 52
Issue: 1
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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