Effect of a rye B chromosome and its segments on homoeologous pairing in hybrids between common wheat and Aegilops variabilis
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- Kousaka Ryota
- Laboratory of Plant Genetics, Graduate School of Agriculture, Kyoto University
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- Endo Takashi R.
- Laboratory of Plant Genetics, Graduate School of Agriculture, Kyoto University
書誌事項
- タイトル別名
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- Effect of a rye B chromosome and its segments on homoeologous pairing in hybrids between common wheat and <i>Aegilops variabilis</i>
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抄録
Rye B chromosomes, which are supernumerary chromosomes dispensable for the host but increase in number by non-disjunction after meiosis, have been reported to affect meiotic homoeologous pairing in wheat-rye hybrids. The effect of a rye B chromosome (B) and its segments (B-9 and B-10) on homoeologous pairing was studied in hybrids between common wheat (2n = 42) and Aegilops variabilis (2n = 28), with reference to the Ph1 gene located on wheat chromosome 5B. The B-9 and B-10 chromosomes are derived from reciprocal translocations between a wheat and the B chromosomes, and the former had the B pericentromeric segment and the latter had the B distal segment. Both the B and B-9 chromosomes suppressed homoeologous pairing when chromosome 5B was absent. On the other hand, the B-9 and B-10 chromosomes promoted homoeologous pairing when 5B was present. On pairing suppression, B-9 had a greater effect in one dose than in two doses, and B-9 had a greater effect than B-10 had in one dose. These results suggested that the effect of the B chromosomes on homoeologous pairing was not confined to a specific region and that the intensity of the effect varied depending on the presence or absence of 5B and also on the segment and dose of the B chromosome. The mean chiasma frequency (10.23) in a hybrid (2n = 36) possessing 5B and one B-9 was considerably higher than that (2.78) of a hybrid (2n = 35) possessing 5B alone, and was comparable with that (14.09) of a hybrid (2n = 34) lacking 5B. This fact suggested that the B chromosome or its segment can be used in introducing alien genes into wheat by inducing homoeologous pairing between wheat and alien chromosome.<br>
収録刊行物
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- Genes & Genetic Systems
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Genes & Genetic Systems 87 (1), 1-7, 2012
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詳細情報 詳細情報について
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- CRID
- 1390282680451508864
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- NII論文ID
- 10030616055
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- NII書誌ID
- AA11077421
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- DOI
- 10.1266/ggs.87.1
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- COI
- 1:STN:280:DC%2BC38rnvVGmsQ%3D%3D
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- ISSN
- 18805779
- 13417568
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- NDL書誌ID
- 023569102
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- PubMed
- 22531789
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- PubMed
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可