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Fertility of Interspecific F1 Hybrids and Hybrid Derivatives Involving Tetraploid Species of Aegilops Section Pleionathera

Moshe Feldman
Evolution
Vol. 19, No. 4 (Dec., 1965), pp. 556-562
DOI: 10.2307/2406253
Stable URL: http://www.jstor.org/stable/2406253
Page Count: 7
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Fertility of Interspecific F1 Hybrids and Hybrid Derivatives Involving Tetraploid Species of Aegilops Section Pleionathera
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Abstract

Fertility data from interspecific F1 hybrids and hybrid derivatives between tetraploid species of the Aegilops section Pleionathera Eig show the feasibility of gene-flow between the species investigated. Artificial and natural F1 hybrids produced a small number of viable female gametes while the majority of the backcross progenies (BC1 and BC2 generations) were characterized by a steep increase in fertility. It is assumed that in nature, full genetic stabilization is attained by such hybrid derivatives already very few generations after the initial hybridization. Thus, the fertility data in demonstrating the possibility of interspecific gene-flow support the hypothesis that polyploids of this group are genetically interconnected.

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