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首页> 外文期刊>Breeding science >A major QTL confers rapid internode elongation in response to water rise in deepwater rice.
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A major QTL confers rapid internode elongation in response to water rise in deepwater rice.

机译：一个主要的QTL响应于深水水稻中的水上升而赋予快速节间伸长。

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摘要

To avoid drowning under flooded conditions, deepwater rice responds to rising water level by rapid internode elongation. Quantitative trait locus (QTL) analysis, using a deepwater rice cultivar (Oryza sativa) and a wild rice species (O. rufipogon) with deepwater characteristics, revealed the presence of major QTLs (qTIL12, qNEI12 and qLEI12) in a common chromosomal region that regulates internode elongation. Genetic analysis revealed that a QTL inherited in a dominant manner, was located on the long arm of chromosome 12. A nearly isogenic line (NIL), produced by backcross introduction of a chromosome fragment carrying this major QTL into non-deepwater rice, exhibited a dramatic internode elongation in response to water rise. This indicates that the difference between deepwater rice and non-deepwater rice is associated with the presence of the QTL, and that this sequence is sufficient to confer deepwater characteristics. Although deepwater rice and non-deepwater rice share a common machinery for internode elongation; non-deepwater rice cannot activate the machinery in response to flooding, unlike deepwater rice which harbors this major QTL.
机译：为了避免在淹水条件下溺水，深水稻米通过节间快速伸长对水位上升做出响应。使用深水水稻品种（Oryza sativa）和具有深水特征的野生稻品种（O. rufipogon）进行定量性状基因座（QTL）分析，发现在常见的染色体区域存在主要的QTL（qTIL12，qNEI12和qLEI12）。调节节间伸长。遗传分析表明，一个以显性遗传方式遗传的QTL位于12号染色体的长臂上。通过将带有这个主要QTL的染色体片段回交引入非深水水稻中，产生了一个近等基因系（NIL）。响应于水的上升，节间急剧伸长。这表明深水稻和非深水稻之间的差异与QTL的存在有关，并且该序列足以赋予深水特性。尽管深水稻和非深水稻具有相同的节间伸长机制。与拥有主要QTL的深水稻米不同，非深水稻米无法响应洪水而启动机械。

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