Synthesis of a New Amphidiploid Species of Brassica: B. amarifolia Narain and Prakash View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

1967-01

AUTHORS

ANUBHAVA NARAIN, SHYAM PRAKASH

ABSTRACT

THERE have been reports of the raising of artificial amphidiploid varieties of Brassica juncea Coss synthesized with members of different interfertile species of Brassica with twenty chromosomes as one of the parents and species of B. nigra Koch with sixteen chromosomes as the other parent1,2. Any attempt to cross B. tournefortii Gouan (also 2n = 20) with B. nigra has been unsuccessful3,4, and B. tournefortii does not give fertile hybrids with any of the Brassica species with twenty chromosomes4,5. Olsson has therefore assigned it a status as a separate species quite distinct from the other species of the genus with twenty chromosomes, which have been lumped under different subspecies of B. campestris5. We have also noted that there is very little homology between the A genomes of Brassica and of B. tournefortii in their F1 hybrids, because twenty to sixteen univalents and nought to two bivalents were found in first metaphase plates and their genomes can be distinguished. An amphidiploid arising from the cross between B. tournefortii and B. nigra is therefore likely to be a new species combining good agronomic characteristics, dwarf size, profuse tillering habit, narrow flowering range and aphid resistance6 of the wild donor parent, B. tournefortii. More... »

PAGES

198-199

References to SciGraph publications

Journal

TITLE

Nature

ISSUE

5072

VOLUME

213

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/213198a0

DOI

http://dx.doi.org/10.1038/213198a0

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1047240831


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