Abstract
The normal development of the endosperm appears to depend on a ratio of two female genomes to one male genome in most angiosperms. However, successful crosses between some tuber-bearingSolarium species do not conform to this ratio. An endosperm balance number (EBN) hypothesis has been proposed to reconcile the two female genomes: one male genome ratio proposal and the anomalous crossing behavior of some species. Crosses performed to test the EBN hypothesis are reported in this paper. The results support the hypothesis and demonstrate its usefulness in predicting the success or failure of a cross and the ploidy of the offspring. A format for conducting and reporting crossing experiments is proposed that facilitates the comparison of results of different experiments.
Resumen
El desarrollo normal del endosperma, parece depender en la proporción de dos genomios provenientes de la planta hembra y uno de la planta macho; sin embargo, cruzamientos entre algunas especies tuberíferas deSolanum se han conseguido y no conforman dicha proporción. Se ha propuesto la hipótesis de factures de balance en el endosperma (EBN) para reconciliar la proporción de genomios 2:1 (hembra: macho) y el comportamiento anormal en cruzamientos de algunas especies. Cruzamientos de prueba de dicha hipótesis se reporta en el presente artículo y los resultados obtenidos concuerdan con ella, demostrando su utilidad en la predictión de éxito o fracaso del cruzamiento, asimismo, el nivel de ploidía de la progene. Un esquema para conducir y reportar experimentos de cruzamientos es propuesto facilitando la comparación de resultados de diferentes experimentos.
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Cooperative investigation of the U.S. Department of Agriculture, Science and Education Administration, Agricultural Research, and Wisconsin Agricultural Experiment Station. Supported in part by grants from the Graduate School, University of Wisconsin, Madison, Wisconsin.
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Johnston, S.A., Hanneman, R.E. Support of the endosperm balance number hypothesis utilizing some tuber-bearingSolanum species. American Potato Journal 57, 7–14 (1980). https://doi.org/10.1007/BF02852750
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DOI: https://doi.org/10.1007/BF02852750