2020-04-012024-05-14https://scholars.lib.ntu.edu.tw/handle/123456789/655408摘要：酪梨是世界上具有高貿易價值的果品，台灣為亞洲地區酪梨重要生產地區，並擁有多種適應亞洲氣候的在地選育品種。在全球面對極端氣候發生越趨頻繁，淺根性的酪梨極易發生淹水逆境，植株萎凋、落葉、根部褐化壞死，嚴重影響生產。本計畫旨在調查台灣在地之酪梨品種在面對淹水時的生理變化，以品種間的差異性變化，篩選適合用於耐淹水逆境的生理指標。酪梨在淹水逆境下，由淹水造成的土壤低氧環境引發的逆境反應，同時會造成與維持養份製造能力、植物防禦反應等相關基因表現量改變。計畫將針對台灣酪梨品種與種原蒐集之國外品種，比較品種間基因表現差異，以篩選具差異性的分子序列，作為輔助選育分子標誌。本計畫期能由不同方向瞭解酪梨面對逆境時的反應及品種間差異，結合植物生理表徵與分子標誌表現，開發具應用可行性的輔助育種模式，降低酪梨產業面對淹水逆境時造成的損害。<br> Abstract: Avocado is a fruit with high trade value in the world. Taiwan is an important production area for avocado in Asia, and we have many local cultivars that adapt to the Asian climate. In the face of extreme weather in the world, the avocados with the shallow-root system are sensitive to flooding. The plants will be withering, defoliation, browning and necrosis of the roots, which seriously affects production. The aim of this project is to investigate the physiological changes in Taiwan`s avocado cultivars in the face of flooding and to screen for physiological indicators suitable for use in flooding tolerances. The flooding stress causes the hypoxia environment. The gene expression related to maintaining nutrient and plant defense response changed significantly. We will compare the differences in gene expression between varieties of Taiwanese avocado cultivars, in order to screen differential expression by related sequences and the sequences will be the candidates as a molecular marker for assisted breeding. The expectation of this project is to understand the response of avocados in the face of adversity and the differences between cultivars in different directions. Combining plant physiological characterization and molecular marker performance, we are trying to develop useful breeding markers and to reduce the damage caused by the flooding in the avocado industry.淹水砧木基因分子標誌floodingrootstockgenic molecular markers酪梨耐淹水之關鍵生理指標與篩選模式建立