Journal
GENOME
Volume 54, Issue 12, Pages 959-964Publisher
CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESS
DOI: 10.1139/G11-062
Keywords
Ph gene; homoeologous metaphase I pairing; GISH
Funding
- 973 Program [2009CB118300, 2010CB134402]
- CAS
- National Natural Science Foundation of China [31071418, 31071420]
- Education Commission
- Science and Technology Commission of Sichuan Province [2011JQ0016]
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The ph-like genes in the Chinese common wheat landrace Kaixian-luohanmai (KL) induce homoeologous pairing in hybrids with alien species. In the present study, meiotic phenotypic differences on homoeologous chromosome pairing at metaphase I between hybrids of wheat genotypes Chinese Spring ph1b (CSph1b) and KL with rye were studied by genomic in situ hybridization (GISH). The frequency of wheat-wheat associations was higher in CSph1b x rye than in KL x rye. However, frequencies of wheat-rye and rye-rye associations were higher in KL x rye than in CSph1b x rye. These differences may be the result of different mechanisms of control between the ph-like gene(s) controlling homoeologous chromosome pairing in KL and CSph1b. Wheat-wheat associations were much more frequent than wheat-rye pairing in both hybriods. This may be caused by lower overall affinity, or homoeology, between wheat and rye chromosomes than between wheat chromosomes.
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