期刊
JOURNAL OF PLANT RESEARCH
卷 135, 期 1, 页码 81-92出版社
SPRINGER JAPAN KK
DOI: 10.1007/s10265-021-01354-9
关键词
Allotetraploid; Autotetraploid; Hybridization; Long terminal repeat retrotransposons; Solanum kurtzianum; Solanum tuberosum
资金
- Argentina, Agencia Nacional de Promocion Cientifica y Tecnica (ANPCyT) [PICT 1243]
- Universidad Nacional de Cuyo, Mendoza, Argentina [06/A597]
The study evaluated the impact of interspecific hybridization and polyploidization on the activation of LTR-RT in potatoes, showing that LTR-RT copies were primarily activated in hybrids, while no activation was observed in allotetraploid lines and only one copy was activated in autotetraploids.
Hybridization and polyploidization are major forces in plant evolution and potatoes are not an exception. It is proposed that the proliferation of Long Terminal Repeat-retrotransposons (LTR-RT) is related to genome reorganization caused by hybridization and/or polyploidization. The main purpose of the present work was to evaluate the effect of interspecific hybridization and polyploidization on the activation of LTR-RT. We evaluated the proliferation of putative active LTR-RT in a diploid hybrid between the cultivated potato Solanum tuberosum and the wild diploid potato species S. kurtzianum, allotetraploid lines derived from this interspecific hybrid and S. kurtzianum autotetraploid lines (ktz-autotetraploid) using the S-SAP (sequence-specific amplified polymorphism) technique and normalized copy number determination by qPCR. Twenty-nine LTR-RT copies were activated in the hybrid and present in the allotetraploid lines. Major LTR-RT activity was detected in Copia-27, Copia-12, Copia-14 and, Gypsy-22. According to our results, LTR-RT copies were activated principally in the hybrid, there was no activation in allotetraploid lines and only one copy was activated in the autotetraploid.
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