Polymorphism of Phaseolus vulgaris var. aborigineus (Fabaceae). Evidences of natural hibridation

A polymorphic population of Phaseolus vulgaris var. aborigineus growing at the Northwest of Argentina was studied. In order to know the origin of this polymorphism, some plants belonging to the var. aborigineus, other plants showing floral dimorphism and other individuals with particular characters...

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Autor principal: Hoc, P.S
Otros Autores: Espert, S.M, Drewes, S.I, Burghardt, A.D
Formato: Capítulo de libro
Lenguaje:Español
Publicado: 2003
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Acceso en línea:Registro en Scopus
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100 1 |a Hoc, P.S. 
245 1 0 |a Polymorphism of Phaseolus vulgaris var. aborigineus (Fabaceae). Evidences of natural hibridation 
246 3 1 |a Polimorfismo en Phaseolus vulgaris var. aborigineus (Fabaceae). Evidencias que indican hibridación natural 
260 |c 2003 
270 1 0 |m Hoc, P.S.; Fac. de Ciencias Exactas y Naturales, U.B.A. Pab. 2, Ciudad Universitaria, C1428 EHA. Buenos Aires, Argentina; email: hoc@bg.fcen.uba.ar 
506 |2 openaire  |e Política editorial 
504 |a (1998) STATISTICA for Windows [Computer Program Manual], , StatSoft, Inc. Tulsa, UK 
504 |a Baudet, J.C., Origine et classification des espèces cultivèes du genre Phaseolus (1977) Bull. Soc. Roy. Bot. Belgique, 110, pp. 65-76 
504 |a Beebe, S., Rengifo, J., Gaitan, E., Duque, M.C., Tohme, J., Diversity and origin of Andean landraces of common bean (2001) Crop Sci., 41, pp. 854-862 
504 |a Beebe, S., Toro, O., Gonzalez, A.V., Chacon, M.I., Debouck, D.G., Wild-weedy-crop complexes of common bean (Phaseolus vulgaris L., Fabaceae) in the Andes of Peru and Colombia, and their implications for conservation and breeding (1997) Genet. Res. Crop Evol., 44, pp. 73-91 
504 |a Burkart, A., (1952) Las Leguminosas Argentinas Silvestres y Cultivadas, 569p. , ACME. Buenos Aires 
504 |a Cattan-Toupance, L., Michalakis, Y., Neema, C., Genetic structure of wild bean populations in their South-Andean center of origin (1998) Theor. Appl. Genet., 96, pp. 844-851 
504 |a Dafni, A., (1992) Pollination Ecology. A Practical Approach, 250p. , Oxford University 
504 |a Freyre, R.R., Ríos, L., Guzmán, D., Debouck, D., Gepts, P., Ecogeographic distribution of Phaseolus spp. (Fabaceae) in Bolivia (1996) Econ. Bot., 50, pp. 195-215 
504 |a Hoc, P.S., Amela García, M.T., Biología floral y sistema reproductivo de Phaseolus vulgaris var. aborigineus (Fabaceae) (1999) Rev. Biol. Trop., 47, pp. 59-97 
504 |a Marèchal, R., Mascherpa, J.M., Stainier, F., Estudio taxonómico de un grupo complejo de especies de Phaseolus y Vigna (1978) Boissiera, 28, pp. 1-273 
504 |a Nakamura, R.R., Seed abortion and seed size variation within fruits of Phaseolus vulgaris: Pollen donor and resource limitation effects (1988) Amer. J. Bot., 75, pp. 1003-1010 
504 |a Paredes, O.M., Gepts, P., Extensive introgression of Middle American germplasm into Chilean common bean cultivars (1995) Genet. Resourc. & Crop Evol., 42, pp. 29-41 
520 3 |a A polymorphic population of Phaseolus vulgaris var. aborigineus growing at the Northwest of Argentina was studied. In order to know the origin of this polymorphism, some plants belonging to the var. aborigineus, other plants showing floral dimorphism and other individuals with particular characters were collected. Their seeds, obtained after field-work treatments of autogamy and free pollination, were sown in a greenhouse, isolated of the access of pollinators. The growth of each plant was followed until its fructification, and the number of plants that died due to infections was recorded. The number of plants that flowered and fructified was registered in order to study their reproductive success. The floral, fruit and seed qualitative and quantitative characters were documented. With the results obtained, the authors concluded that those individuals that showed floral dimorphism are probably a result of hybridization and introgression between the var. aborigineus and "old cultivars". This hypothesis is supported by the presence of divergent segregation, observed in the offspring of the plants with this segregation. Other crops should allow the genic flow between the parental entities, with the consequence of the establishment of an hybrid population coexistent with their ancestors. Perhaps, as a result of introgression, the stabilized lines exhibit characters different from their parental varieties. The results of autopollination and free pollination in those individuals assigned to var. aborigineus, showed that free pollination brings a great genetic plasticity, because next generations can persist and resist infections. The offspring of the F1 was followed. The plants that belonged to var. aborigineus, product of free pollination, exhibited fast growth and were healthy, while the descendant of the individuals with the floral dimorphism showed characteristics that allowed to conclude the possible existence of degeneration of the hybrid progeny; this characteristics were: curled radicles with cotyledons that never emerge, plantule's apex that soon die with the following development of branches from the cotyledon's axil, and death after some weeks. This degeneration indicates that an unwanted gene flow in the area could lead to a decline in the wild bean population. The vigor, high reproductive success and resistance to illnesses of the individuals corresponding to the var. vulgaris, whose progenitor was treated for free fecundation, and the offspring of the plants with cultivated characteristics, are indicative of the necessity of preserving this germplasm to evaluate its agronomic potential to brief term. The DNA analyses already initiated, will allow the confirmation of the hypotheses outlined in this work.  |l eng 
593 |a Fac. de Ciencias Exactas y Naturales, U.B.A. Pab. 2, Ciudad Universitaria, C1428 EHA. Buenos Aires, Argentina 
690 1 0 |a FABACEAE 
690 1 0 |a MORPHOLOGICAL STUDIES 
690 1 0 |a NATURAL HYBRIDIZATION 
690 1 0 |a PHASEOLUS VULGARIS 
690 1 0 |a REPRODUCTIVE SUCCESS 
690 1 0 |a ARTICLE 
690 1 0 |a BEAN 
690 1 0 |a GENETIC POLYMORPHISM 
690 1 0 |a GENETICS 
690 1 0 |a HYBRIDIZATION 
690 1 0 |a PHYSIOLOGY 
690 1 0 |a REPRODUCTION 
690 1 0 |a HYBRIDIZATION, GENETIC 
690 1 0 |a PHASEOLUS 
690 1 0 |a POLYMORPHISM, GENETIC 
690 1 0 |a REPRODUCTION 
690 1 0 |a FABACEAE 
690 1 0 |a PHASEOLUS (ANGIOSPERM) 
690 1 0 |a PHASEOLUS VULGARIS 
651 4 |a ARGENTINA 
651 4 |a ARGENTINA 
700 1 |a Espert, S.M. 
700 1 |a Drewes, S.I. 
700 1 |a Burghardt, A.D. 
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