title: Comparison of homoeologous chromosome pairing between hybrids of wheat genotypes Chinese Spring ph1b and Kaixian-luohanmai with rye.
abstract: 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×rye than in KL×rye. However, frequencies of wheat-rye and rye-rye associations were higher in KL×rye than in CSph1b×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.
authors: Triticeae Research Institute, Sichuan Agricultural University, Wenjiang, Sichuan 611130, PR China.
authors: Ming
authors: M
authors: Hao
authors: Jiangtao
authors: J
authors: Luo
authors: Min
authors: M
authors: Yang
authors: Lianquan
authors: L
authors: Zhang
authors: Zehong
authors: Z
authors: Yan
authors: Zhongwei
authors: Z
authors: Yuan
authors: Youliang
authors: Y
authors: Zheng
authors: Huaigang
authors: H
authors: Zhang
authors: Dengcai
authors: D
authors: Liu
mesh_terms: D002678:Chimera / Q000235:genetics*; D023902:Chromosome Pairing; D032461:Chromosomes, Plant / Q000235:genetics; D003433:Crosses, Genetic; D018745:Genome, Plant; D005838:Genotype; D017404:In Situ Hybridization, Fluorescence; D012434:Secale / Q000235:genetics*; D014908:Triticum / Q000235:genetics*