Characterization of a bean landrace from Sicily: the ‘fagiolo Badda di Polizzi'

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Abstract

Inside the project “Piano per la Produzione di Proteine Vegetali in Sicilia” investigations werecarried out to characterize a bean population cultivated in the Parco delle Madonie area, the‘Fagiolo Badda di Polizzi’. The producers’ interest for this landrace and the appreciation of theconsumers could justify the start up of a valorization program through a product certification.Researches on the morpho-physiological aspects and on the nutritional profile were made intrials conducted between 2005 and 2007. All the Badda bean accessions showed an indeterminateplant growth habit, white flowers and a very delayed flowering time. In particular, a certainvariability was seen and described for the size and shape of pods and seeds. Two types of Baddaare cultivated, differentiated by the secondary seed colour: the “white Badda” and the “blackBadda”. Both have ivory has a primary seed coat colour, but the “white Badda” has a brownish spoton the hilum, whereas the “black Badda” shows a black spot. In addition, the secondary colour ofthe seed coat of the “black Badda” showed two different pigmentations: violet and black, thatsuggested a genetic differentiation into different sub-populations. Finally, the “black Badda”resulted less susceptible to viral infections than the “white” one.At the molecular level, three accessions of Badda bean (two ‘white’ and one ‘black’) havebeen compared with control varieties, including one accessions of ‘Fagiolo del Purgatorio’ fromGradoli (VT), seven landraces of the Borlotto type collected in the Marche region and the cultivarsBat, Jalo, Clio and Big Borlotto. The analyses were carried out using 12 Inter Simple SequenceRepeats (ISSR) primers yielding a total of 140 bands. Although no specific band for the Baddalandrace were detected, two amplicons were found only in the accessions of Badda and inMonachello, a bicol-seeded type from the Marche region, morphologically similar to the “blackBadda”. The dendrogram obtained from the genetic distances based on ISSRs indicated that theBadda type belongs to the Andean gene pool and that it is distinguishable from the tested controlsbeing grouped into a separate cluster. Within the Badda type, the ‘white’ accessions were notseparated from the ‘black’ one.
Lingua originaleEnglish
Numero di pagine1
Stato di pubblicazionePublished - 2008

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