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首页> 外文期刊>Theoretical and Applied Genetics >Heredity and genetic mapping of domestication-related traits in a temperate japonica weedy rice
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Heredity and genetic mapping of domestication-related traits in a temperate japonica weedy rice

机译：温带粳稻杂草驯化相关性状的遗传与遗传定位

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摘要

Rice is often found as various weedy forms in temperate or newly cultivated rice growing regions throughout the world. The emergence of these forms in the absence of true wild rice remains unclear. A genetic analysis of domestication-related traits (weed syndrome) has been conducted to better understand the appearance of these plants in rice fields. A doubled haploid (DH) population was derived from a cross between a japonica variety and a weedy plant collected in Camargue (France) to set up a genetic linkage map consisting of 68 SSR and 31 AFLP loci. Five qualitative traits related to pigmentation of different organs and 15 developmental and morphological quantitative traits were scored for genes and QTLs mapping. Despite a good reactivity in anther culture and a high fertility of the DH lines, segregation distortions were observed on chromosomal segments bearing gametophytic and sterility genes and corresponded to various QTLs evidenced in indica×japonica distant crosses. Mapping of the coloration genes was found to be in agreement with the presence of several genes previously identified and according to the genetic model governing the synthesis and distribution of anthocyan pigment in the plant. In addition, the main specific traits of weedy forms revealed the same genes/QTLs as progeny derived from a cross between Oryza sativa and its wild progenitor O. rufipogon. A large variation for most characters was found in the DH population, including transgressive variation. Significant correlations were observed between morphology and traits related to weeds and corresponded to a distinct colocalization of most of the QTLs on a limited number of chromosomal regions. The significance of these results on the origin of weedy forms and the de-domestication process is discussed.
机译：在世界各地的温带或新近种植的稻米种植地区，稻米经常以各种杂草形式存在。在没有野生稻的情况下，这些形式的出现尚不清楚。为了更好地了解这些植物在稻田中的外观，已对驯化相关性状（杂草综合征）进行了遗传分析。一个双倍单倍体（DH）种群来自日本Camargue收集的一个粳稻品种和一个杂草植物之间的杂交，以建立由68个SSR和31个AFLP位点组成的遗传连锁图谱。对与不同器官的色素沉着相关的五个定性性状以及15个发育和形态定量性状进行了评分，以进行基因和QTL定位。尽管在花药培养中具有良好的反应性和DH系的高育性，但在带有配子体和不育基因的染色体片段上观察到了分离畸变，并对应于in×粳稻远缘杂交中证明的各种QTL。发现着色基因的作图与先前鉴定的几种基因的存在是一致的，并且符合控制花色色素在植物中合成和分布的遗传模型。此外，杂草形式的主要特定性状揭示了与稻米与其野生祖鲁米色豆杂交后代衍生的后代相同的基因/ QTL。在DH群体中发现了大多数字符的较大变异，包括海侵变异。在与杂草有关的形态和性状之间观察到显着的相关性，并对应于大多数QTL在有限数量的染色体区域上的明显共定位。讨论了这些结果对杂草形式起源和去驯化过程的意义。

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