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Comparative analysis of nuclear, chloroplast, and mitochondrial genomes of watermelon and melon provides evidence of gene transfer
Scientific Reports ( IF 4.6 ) Pub Date : 2021-01-15 , DOI: 10.1038/s41598-020-80149-9
Haonan Cui 1, 2 , Zhuo Ding 1, 2 , Qianglong Zhu 3 , Yue Wu 1, 2 , Boyan Qiu 1, 2 , Peng Gao 1, 2
Affiliation  

During plant evolution, there is genetic communication between organelle and nuclear genomes. A comparative analysis was performed on the organelle and nuclear genomes of the watermelon and melon. In the watermelon, chloroplast-derived sequences accounted for 7.6% of the total length of the mitochondrial genome. In the melon, chloroplast-derived sequences accounted for approximately 2.73% of the total mitochondrial genome. In watermelon and melon, the chloroplast-derived small-fragment sequences are either a subset of large-fragment sequences or appeared multiple times in the mitochondrial genome, indicating that these fragments may have undergone multiple independent migration integrations or emerged in the mitochondrial genome after migration, replication, and reorganization. There was no evidence of migration from the mitochondria to chloroplast genome. A sequence with a total length of about 73 kb (47%) in the watermelon chloroplast genome was homologous to a sequence of about 313 kb in the nuclear genome. About 33% of sequences in the watermelon mitochondrial genome was homologous with a 260 kb sequence in the nuclear genome. A sequence with a total length of about 38 kb (25%) in the melon chloroplast genome was homologous with 461 sequences in the nuclear genome, with a total length of about 301 kb. A 3.4 Mb sequence in the nuclear genome was homologous with a melon mitochondrial sequence. These results indicate that, during the evolution of watermelon and melon, a large amount of genetic material was exchanged between the nuclear genome and the two organelle genomes in the cytoplasm.



中文翻译:

西瓜和甜瓜的核、叶绿体和线粒体基因组的比较分析提供了基因转移的证据

在植物进化过程中,细胞器和核基因组之间存在遗传通讯。对西瓜和甜瓜的细胞器和核基因组进行了比较分析。在西瓜中,叶绿体来源的序列占线粒体基因组总长度的 7.6%。在甜瓜中,叶绿体来源的序列约占线粒体基因组总数的 2.73%。在西瓜和甜瓜中,叶绿体来源的小片段序列要么是大片段序列的一个子集,要么在线粒体基因组中多次出现,说明这些片段可能经历了多次独立的迁移整合或迁移后出现在线粒体基因组中、复制和重组。没有证据表明从线粒体迁移到叶绿体基因组。西瓜叶绿体基因组中全长约73kb(47%)的序列与核基因组中约313kb的序列同源。西瓜线粒体基因组中约 33% 的序列与核基因组中的 260 kb 序列同源。甜瓜叶绿体基因组中全长约38kb(25%)的序列与核基因组中的461个序列同源,全长约301kb。核基因组中的 3.4 Mb 序列与甜瓜线粒体序列同源。这些结果表明,在西瓜和甜瓜的进化过程中,核基因组与细胞质中的两个细胞器基因组之间发生了大量的遗传物质交换。西瓜叶绿体基因组中全长约73kb(47%)的序列与核基因组中约313kb的序列同源。西瓜线粒体基因组中约 33% 的序列与核基因组中的 260 kb 序列同源。甜瓜叶绿体基因组中全长约38kb(25%)的序列与核基因组中的461个序列同源,全长约301kb。核基因组中的 3.4 Mb 序列与甜瓜线粒体序列同源。这些结果表明,在西瓜和甜瓜的进化过程中,核基因组与细胞质中的两个细胞器基因组之间发生了大量的遗传物质交换。西瓜叶绿体基因组中全长约73kb(47%)的序列与核基因组中约313kb的序列同源。西瓜线粒体基因组中约 33% 的序列与核基因组中的 260 kb 序列同源。甜瓜叶绿体基因组中全长约38kb(25%)的序列与核基因组中的461个序列同源,全长约301kb。核基因组中的 3.4 Mb 序列与甜瓜线粒体序列同源。这些结果表明,在西瓜和甜瓜的进化过程中,核基因组与细胞质中的两个细胞器基因组之间发生了大量的遗传物质交换。

更新日期:2021-01-16
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