植物遗传资源学报2025，Vol.26Issue(8)：1553-1563,11.DOI:10.13430/j.cnki.jpgr.20241231002
林芝市境内不同海拔梯度野生苦荞的调查与鉴定
Investigation and Identification of Wild Tartary Buckwheat at Different Altitude Gradients in Nyingchi City
摘要
Abstract
Nyingchi city,Tibet Autonomous Region,is located in the southeast of Qinghai-Tibet Plateau,which belongs to the mountain valley landform in the warm and semi-humid climate of the plateau,with a large vertical elevation drop and rich and unique wild buckwheat resources.A series of changes in temperature,humidity,air pressure,and ultraviolet intensity brought about by altitude changes can cause changes in plant morphology and metabolite content.In order to explore the law between functional traits of wild tartary buckwheat and altitude,the wild buckwheat expedition team of the Institute of Crop Sciences,Chinese Academy of Agricultural Sciences investigated and collected wild buckwheat germplasm in Nyingchi city in October 2023,and five altitude gradients of 3100 m,3300 m,3500 m,3700 m,and 3900 m were selected to compare and analyze the morphological differences and flavonoid metabolite contents of wild tartary buckwheat.The results showed that 1000-grain weight,grain length,grain width,grain diameter,grain perimeter,and grain area of wild tartary buckwheat increased first and then decreased with the increase of altitude,reaching the maximum at 3700 m altitude and significantly higher than other altitude gradients.There were also significant differences in the contents of most flavonoid metabolites in wild tartary buckwheat at different elevation gradients:the contents of rutin and quercetin in wild tartary buckwheat were the highest at 3900 m altitude.The contents of quercetin 7-O-glucoside,proanthocyanidins B1 and proanthocyanidins C1 in wild tartary buckwheat were the highest at 3700 m altitude,and the contents of proanthocyanidins in wild tartary buckwheat was the highest at 3500 m altitude.The highest contents of kaempferol,cyanidin,afodaside,and pyroside were found in wild tartary buckwheat at 3300 m.The results analyzed the differences in the distribution and abundance,seed traits and flavonoid content of wild tartary buckwheat under different altitude gradients,revealed the physiological mechanism of wild tartary buckwheat in adapting to the ecological environment,laid a foundation for exploring the adaptive evolution of wild tartary buckwheat,and also provided ideas for breeding buckwheat to resist adversity.关键词
野生苦荞/海拔梯度/农艺性状/黄酮类代谢物Key words
wild tartary buckwheat/altitudinal gradient/agronomic trait/flavonoid metabolites引用本文复制引用
彭晓杨,唐新科,王俊珍,周美亮,田泽苗,朱剑锋,杨智敏,冯西博,廖文华,易著虎,李基光,李伟..林芝市境内不同海拔梯度野生苦荞的调查与鉴定[J].植物遗传资源学报,2025,26(8):1553-1563,11.基金项目
国家自然科学基金(32161143005)National Natural Science Foundation of China(32161143005) （32161143005）
