Development of tomatillo (Physalis ixocarpa Brot.) autotetraploids and their chromosome and phenotypic characterization

Robledo Torres, Valentín y Ramírez Godina, Francisca y Foroughbakhch Pournavab, Rahim y Benavides Mendoza, Adalberto y Hernández Guzmán, Gustavo y Reyes Valdés, M. Humberto (2011) Development of tomatillo (Physalis ixocarpa Brot.) autotetraploids and their chromosome and phenotypic characterization. Breeding Science, 61 (3). pp. 288-293. ISSN 1344-7610

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URL o página oficial: http://doi.org/10.1270/jsbbs.61.288

Resumen

The tomatillo, Physalis ixocarpa Brot. (2n = 2x = 24), is an important crop in Mexico, and it is becoming appreciated in other countries. Polyploidy induction is expected to increase its breeding potential. The objective of this work was to develop and characterize tomatillo autotetraploids through colchicine-based induction. Young seedlings of the Rendidora cultivar were treated for 24 h with colchicine in concentrations ranging from 0.04% to 0.20%, and ploidy levels were tested by cytological and flow cytometry techniques. Autotetraploidy was induced with colchicine concentrations of 0.12% and 0.16%, with success rates of 67% and 65%, respectively. Presence of univalents, bivalents and multivalents was observed in prophase I and metaphase I. The basic genome size was not altered in the third generation progeny from treated plants. Autotetraploid plants were fertile and productive, but their pollen development was lower than their diploid counterpart. The polyploid plants showed higher values for life cycle length, plant height, fruit weight and equatorial diameter, fruits per plant, and soluble solid concentration. This is the first report of an autopolyploid cultivated tomatillo. Its genome duplication is readily induced with production of fertile plants, and may be valuable to introduce genetic plasticity in this crop.

Tipo de elemento: Article
Palabras claves no controlados: husk tomato; Autopolyploid; Fertility; Meiotic pairing; Pollen viability; Plant size
Materias: Q Ciencia > QH Historia Natural, Biología
Q Ciencia > QK Botánica
S Agricultura > SB Cultivo de plantas
Divisiones: Ciencias Biológicas
Usuario depositante: Lic. Josimar Pulido
Creadores:
CreadorEmailORCID
Robledo Torres, ValentínNO ESPECIFICADONO ESPECIFICADO
Ramírez Godina, FranciscaNO ESPECIFICADONO ESPECIFICADO
Foroughbakhch Pournavab, Rahimarte_carr@hotmail.comNO ESPECIFICADO
Benavides Mendoza, AdalbertoNO ESPECIFICADONO ESPECIFICADO
Hernández Guzmán, GustavoNO ESPECIFICADONO ESPECIFICADO
Reyes Valdés, M. HumbertoNO ESPECIFICADONO ESPECIFICADO
Fecha del depósito: 06 Mayo 2019 21:21
Última modificación: 06 Mayo 2019 21:21
URI: http://eprints.uanl.mx/id/eprint/15058

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