From genes to growth: The science behind miniature apple trees in UK

Published 2024년 6월 12일

Tridge summary

Researchers from China Agricultural University, led by Yi Wang and Zhenhai Han, have identified the molecular mechanism behind dwarfing in apple rootstocks, focusing on the gene MdARF3 at the Dw1 loci. Their study, published in Horticulture Research, shows that a deletion in the promoter region of MdARF3 in the M9 dwarfing rootstock results in lower gene expression, leading to reduced growth. This deletion disrupts the regulation by the transcription factor MdWOX4-1. These findings offer valuable insights for apple breeding programs, potentially leading to the development of better dwarfing rootstocks that improve production efficiency and support mechanized farming.

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Original content

Apple farming heavily relies on dwarfing rootstocks like M9 for high-density planting and improved fruit quality. However, the exact mechanisms behind the dwarfing effect remain unclear. Previous studies have indicated that dwarfing traits are complex and involve multiple genetic factors. Based on these challenges, there is a need for an in-depth investigation to uncover the molecular basis of dwarfing in apple rootstocks.A research team from China Agricultural University, led by Yi Wang and Zhenhai Han, published their findings in Horticulture Research on February 23, 2024. The study focuses on the gene MdARF3, located on the Dw1 loci, and its differential expression in dwarfing versus vigorous apple rootstocks. The discovery highlights the significant role of MdARF3 in regulating root elongation and plant height, offering new insights into apple rootstock breeding.The study identified that the expression of MdARF3 in the root system of the M9 dwarfing rootstock is lower than in ...

Source: Phys