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INTERGENERIC HYBRIDIZATION FOR WHEAT IMPROVEMENT-III GENETIC VARIATION IN TRITICUM SPECIES AFFECTING HOMOEOLOGUS CHROMOSOME PAIRING

SHAFQAT FAROOQ, N. IQBAL and T.M. SHAH
Cereal Research Communications
Vol. 18, No. 3 (1990), pp. 233-237
Published by: Akadémiai Kiadó
Stable URL: http://www.jstor.org/stable/23783667
Page Count: 5
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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.
INTERGENERIC HYBRIDIZATION FOR WHEAT IMPROVEMENT-III GENETIC VARIATION IN TRITICUM SPECIES AFFECTING HOMOEOLOGUS CHROMOSOME PAIRING
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Abstract

Meiotic analysis was performed on metaphase-I chromosomes in the hybrids of five wheat varieties with Aegilops variabilis accession E which increases homoeologus chromosome pairing and, two other accessions which did not show this ability. Significant differences were found in the mean chiasma frequencies in hybrids of different wheat varieties with Ae. variabilis E (chiasma frequency range, 5.1-6.9/cell). No combination yielded a chiasma frequency equal to or more than that (13.2) observed in the hybrid, LU-26 × Ae. variabilis E. Accessions A and B also showed maximum chiasma frequency after hybridization with LU-26. Significant variation in chiasma frequency occurred in respect of both wheat varieties and Aegilops variabilis accessions.

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