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Parent–offspring variation transmission in full-sib families revealed predominantly paternal inheritance of chloroplast DNA in Pinus massoniana (Pinaceae)
Tree Genetics & Genomes ( IF 2.4 ) Pub Date : 2021-07-09 , DOI: 10.1007/s11295-021-01519-6
ZhouXian Ni 1 , PengYan Zhou 1 , Yue Xin 1 , Meng Xu 1 , Li-An Xu 1
Affiliation  

The inheritance of chloroplast genome DNA (cpDNA) differs from that of the nuclear genome. The cpDNAs of most species originate from the female parent, whereas some plastids are paternal or biparental in origin. The plastid transmission of Pinaceae species is thought to occur exclusively by paternal inheritance with a few exceptions. However, plastid transmission in a common species of Pinus (Pinaceae), Pinus massoniana, remains unexplored. In this study, 16 parents and 84 progenies from 9 full-sib families including one reciprocal cross were used as research materials, and a minisatellite locus and 3 cpDNA DNA fragments were used to investigate the plastid transmission of P. massoniana. The results showed that 96.73% of the offspring had cpDNA sequences consistent with those of their male parents, whereas only 3.27% of the offspring had cpDNA sequences similar to those of their female parents. These results revealed that plastid transmission in P. massoniana is predominantly paternal, mainly manifesting as high-frequency (greater than 95%) paternal inheritance and low-frequency maternal inheritance. However, the mechanism of paternal inheritance requires more evidence and further research.



中文翻译:

全同胞家族中的亲代变异传递揭示了马尾松(松科)叶绿体 DNA 的主要父系遗传

叶绿体基因组 DNA (cpDNA) 的遗传与核基因组的遗传不同。大多数物种的 cpDNA 来源于母本,而一些质体来源于父本或双亲。松科物种的质体传播被认为完全通过父本遗传发生,只有少数例外。然而,一种常见的松科(Pinaceae)马尾松Pinus massoniana)的质体传播仍未得到探索。本研究以包括1个互惠杂交在内的9个全同胞家族的16个亲本和84个后代为研究材料,并利用一个小卫星位点和3个cpDNA DNA片段研究了马尾松的质体传播. 结果表明,96.73%的后代具有与父本一致的cpDNA序列,而只有3.27%的后代具有与母本相似的cpDNA序列。这些结果表明,马尾松质体传播以父本为主,主要表现为高频(大于95%)父本遗传和低频母本遗传。然而,父系遗传的机制需要更多的证据和进一步的研究。

更新日期:2021-07-09
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