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Book of Abstracts First Legume Society Conference 2013: A Legume Odyssey Novi Sad, Serbia, 9-11 May 2013
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Genes ti (terminal inflorescence) and rb (restricted branching) in legume breeding
Wojciech, Święcicki 1 , Agnieszka Osiecka 2 , Czesława Nawrot 1
1 Institute of Plant Genetics, Polish Academy of Sciences, Poznań, Poland
2 Research Center for Cultivar Testing, Słupia Wielka, Poland
The flag leaf finishes vegetation growth in cereals. In subsequent plant development exclusively
generative organs are formed – ears, flowers and grains. In legumes, the appearance of generative
organs does not end vegetative growth. In favourable atmospheric conditions, plants form
successive nodes (pea, field bean) or lateral branches (lupins) with new flowers, pods and seeds. It
causes a longer vegetation period and non-uniform seed maturity at harvesting. The above was a
reason to look for plant characteristics controlling an end of vegetative growth. Respective
characteristics/genes were selected from collections and as induced mutations. Genes det in the
pea and ti in the field bean cause terminal inflorescence on the top of the stem while a
homologous row of the gene rb in four lupin crops (L. angustifolius, L. albus, L. luteus and L.
mutabilis) blocks lateral branching. These genes were incorporated into breeding programs in
Poland and the first cultivars were registered: the field bean cv. Tibo (1990), yellow lupin cv.
Manru (1990), narrow-leafed lupin cv. Bar (1991) and Wersal (1995) and white lupin cv. Katon
(1999). Progress in the breeding of a new cultivar model (in comparison to traditional ones) of
the above mentioned legume crops over the past 20 years will be presented. The results of field
trials by the Research Center for Cultivar Testing will be used in the analysis. It is worth
mentioning that appropriate growing technologies should be applied to these new cultivar
ideotypes.
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