CYTOLOGIA
Online ISSN : 1348-7019
Print ISSN : 0011-4545
Apomixis in Trigeneric Hybrids of Triticum aestivum/ Leymus racemosus//Thinopyrum elongatum
A. Mujeeb-Kazi
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JOURNAL FREE ACCESS

1996 Volume 61 Issue 1 Pages 15-18

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Abstract

Seed set on self-sterile intergeneric hybrids occurs as a consequence of induced amphiploidy, backcrossing or by trigeneric hybridization. In this study a self-sterile F1 hybrid of Triticum aestivum/Leymus racemosus (2n = 5x = 35) upon pollination by Thinopyrum elongatum (2n =10x = 70) yielded derivatives that possessed 35 to 70 chromosomes. The single 35 chromosome derivative is considered to be the product of parthenogenetic egg-cell development (apomictic) while the 70 chromosome derivatives resulted from the fertilization of a 35 chromosome egg cell with pollen from Th. elongatum. When 56 chromosome backcross I .T. aestivum/L. racemosus//T.aestivum plants were pollinated by Th. elongatum trigeneric derivatives of normal chromosomal composition were obtained.

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© The Japan Mendel Society
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