The genetic architecture of petal number in Cardamine hirsuta.

The genetic architecture of petal number in Cardamine hirsuta.
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毛碎米荠花瓣数量的遗传结构。

DOI:
10.1111/nph.13586
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发表时间:
2016
期刊:
The New phytologist
影响因子:
--
通讯作者:
Pieper B
Pieper B
中科院分区:
--
文献类型:
--
作者:
Pieper B

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花瓣数量不变是大多数花朵的一个特征,并且通常对遗传和环境变化具有鲁棒性。我们利用碎米荠毛花瓣数量中发现的自然变异来研究该性状在进化过程中丧失稳健性的情况下的遗传基础。我们使用数量性状位点(QTL)分析来表征花瓣数量的遗传结构。平均花瓣数量在5C中表现出从零到四个花瓣的超移变异。 hirsutam 绘制了种群图谱,这种变异具有高度遗传性。我们检测到 15 个等位基因变异影响花瓣数量的 QTL。与诱变诱导的等位基因相比,这些 QTL 的影响相对较小,这表明自然选择可能会将花瓣数量维持在低于 4 的可变范围内。花瓣数量在植物衰老过程中呈现出时间趋势,萼片毛状体数量也是如此,多性状QTL分析表明这些年龄依赖性性状具有共同的遗传基础。我们的结果表明,花瓣数量是由许多影响较小的基因决定的,其中一些基因是年龄依赖性的,并提出了通过释放隐性变异来实现性状进化的机制。
Invariant petal number is a characteristic of most flowers and is generally robust to genetic and environmental variation. We took advantage of the natural variation found inCardamine hirsutapetal number to investigate the genetic basis of this trait in a case where robustness was lost during evolution.We used quantitative trait locus (QTL) analysis to characterize the genetic architecture of petal number.Αverage petal number showed transgressive variation from zero to four petals in fiveC. hirsutamapping populations, and this variation was highly heritable. We detected 15 QTL at which allelic variation affected petal number. The effects of these QTL were relatively small in comparison with alleles induced by mutagenesis, suggesting that natural selection may act to maintain petal number within its variable range below four. Petal number showed a temporal trend during plant ageing, as did sepal trichome number, and multi‐trait QTL analysis revealed that these age‐dependent traits share a common genetic basis.Our results demonstrate that petal number is determined by many genes of small effect, some of which are age‐dependent, and suggests a mechanism of trait evolution via the release of cryptic variation.
DOI: --
发表时间: 1998-08
期刊: Genetics
影响因子: 3.3
作者:
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发表时间: 2004-01-01
期刊: DEVELOPMENT
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DOI: --
发表时间: 1991-05
期刊: Development
影响因子: 4.6
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John L. Bowman;David R. Smyth;E. Meyerowitz
通讯作者: John L. Bowman;David R. Smyth;E. Meyerowitz
DOI: 10.1242/dev.124.3.645
发表时间: 1997
期刊: Development (Cambridge, England)
影响因子: --
作者:
Telfer,A;Bollman,KM;Poethig,RS
通讯作者: Poethig,RS
DOI: --
发表时间: 2016
期刊: Annals of Botany
影响因子: 4.2
作者:
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通讯作者: Angela Hay