10份青梗菜苗期耐热性评价

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中图分类号：S634.3 文献标识码：A 文章编号：0488-5368（2025）04-0030-06

Abstract：To comprehensively evaluate the heat tolerance of green-petiole，non - heading cabbage seedlings，1O germplasm materials were exposed to high-temperature stress in a light incubator.The effects of high -temperature stress on seedling growth and physiological parameters were analyzed using the heat damage index and the afflition function method.The results indicated that high-temperature stress generallyreduced growth parameters，including plant height，plant width，dryand fresh weight，and the root-to-shoot ratio of sedlings. At the same time，high -temperature stress also increased relative conductivity，prolinecontent，superoxide dismutase，catalaseactivities，and malondialdehyde content while decreasing soluble protein content in green -petiole，non-heading cabbage seedlings.Based on clustering analysis using the heat damage index and the afiliation function method，two highly heat-tolerant materials（22XS15，2XS156）and two heat-sensitive materials （22XS44，22XS56） were identified.

Key Words：Green petiole non - heading cabbage； Seedling；Heat tolerance；Heat damage index；Affilia-tion function method；Cluster analysis

不结球白菜（Brassica campestrisL. ssp.chinen-sisMakino）又称小白菜，是十字花科芸臺属，源于长江中下游地区，目前我国各地均有栽培，主要集中在南方地区，是我国广泛栽培的大宗蔬菜之一，种质资源丰富[]。（剩余7367字）