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首页> 外文期刊>Genetic Resources and Crop Evolution >Phylogenetic relationships, interspecific hybridization and origin of some rare characters of wild soybean in the subgenus Glycine soja in China
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Phylogenetic relationships, interspecific hybridization and origin of some rare characters of wild soybean in the subgenus Glycine soja in China

机译：中国大豆大豆亚种野生大豆的亲缘关系，种间杂交及某些稀有性状的起源

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摘要

The Glycine subgenus Soja includes two species, cultivated soybean [(Glycine max (L.) Merr.)] and the progenitor wild soybean (G. soja). However, a morphologically intermediate form, the semi-wild soybean (G. gracilis), exists between the two species, and its taxonomic position is under debate. In this study, we evaluated phylogenetic relationships and occurrence events within the subgenus Soja based on genetic variation of SSR loci using a set of accessions comprising wild soybeans (≤3.0 g 100-seed weight), semi-wild soybeans (3.0 g) and soybean landraces (≥4.0 g). The results showed that semi-wild soybean accessions collected in natural fields should be treated as a variant of G. soja and not of G. max, and were genetically differentiated from the soybean landraces, even large-seeded semi-wild soybean accessions (6.01–9.0 g) with seed weights overlapping with or exceeding those of soybean landraces. Evolutionary bottleneck analysis indicated that semi-wild soybean is not a transitional form in the domestication of cultivated soybeans from wild soybean. G. soja contained two genetically differentiated forms, small-seeded type (typical, plus 2.01–2.50 g) and a large-seeded type (2.51–3.0 g). Genetically, the large-seeded wild soybean was closer to the semi-wild soybean, although in morphology it resembled the typical wild soybean. Ancestry analysis confirmed that cultivated soybean genes have introgressed into modern wild soybean populations. The green cotyledon character and other rare characters such as white flower, grey pubescence, no-seed bloom, and coloured seed-coats (brown, green, and yellow) in wild soybean were shown to be involved in introgression from cultivated soybeans.
机译：大豆大豆属大豆包括两个品种，栽培大豆[（Glycine max（L.）Merr。）]和祖先野生大豆（大豆大豆）。但是，在这两个物种之间存在形态上的中间形式，即半野生大豆（G. gracilis），其分类位置尚有争议。在这项研究中，我们基于SSR基因座的遗传变异，评估了Soja亚种内的系统发生关系和发生事件，使用了一组包括野生大豆（≤3.0g 100种子重量），半野生大豆（> 3.0 g）和大豆地方品种（≥4.0g）。结果表明，在自然田间采集的半野生大豆种质应作为大豆的变种而不是大豆的变种，并且应与大豆地方品种，甚至大种子的半野生大豆种质进行遗传分化（6.01 –9.0 g），种子重量超过或超过大豆地方品种。进化瓶颈分析表明，半野生大豆不是从野生大豆驯化栽培大豆的过渡形式。大豆大豆含有两种遗传分化形式，小种子型（典型，加上2.01-2.50 g）和大种子型（2.51-3.0 g）。从基因上讲，大种子野生大豆更接近半野生大豆，尽管在形态上它类似于典型的野生大豆。祖先分析证实，栽培大豆基因已渗入现代野生大豆种群。已证明，野生大豆中的绿色子叶性状和其他稀有性状，例如白花，灰色短柔毛，无籽绽放和有色种皮（棕色，绿色和黄色）与渗入大豆有关。

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