Indian Society of Genetics & Plant Breeding

AUTOSYNDETIC AND ALLOSYNDETIC PAIRING IN BRASSICAE

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ONE of the earliest demonstrations ~f true genomic alloploidy in flowering plants ,was
in the
Brassica group of plants by Morinaga (1928, 1931, 1934) and Karpechenko
(1928). It was recognised later that the so called" elementary species" themselves
had in their evolutionary history ancestral genomes with lower chromosome numbers.
Several workers have gathered cytological evidences which indicated the basic
number in the group to be variously 4, 5 or 6 (Catcheside, 1934, 1937; Sikka, 1940;
Robbelen, 1960). Mizushima (1950) has assembled all the available evidence and
has diagrammatically presented the genomic interrelationships amongst the elementary
species, mainly on tll.e basis of chromosome pairing in hybrids. This is presented in
Fig.
I. While the inter-relationship, so based on auto- and allo-syndetic pairin~  

Info

Year: 1964
Volume: 24
Issue: 1
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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