植物遗传资源学报2025，Vol.26Issue(1)：79-89,11.DOI:10.13430/j.cnki.jpgr.20240405001
玉米萌发期耐盐性评价及其杂种优势模式分析
Evaluation of Salt Tolerance and Analysis of Their Heterosis Patterns in Maize during Germination Period
摘要
Abstract
To evaluate the tolerance of different maize materials to salt stress during the germination period and to explore the salt talerance of hybrid maize materials from different hybridization patterns during the germination stage.This study used a 160 mmol/L NaCl solution to treat 152 maize inbred lines and 303 hybrid varieties under salt stress.Distilled water culture was used as the control,and salt tolerance during germination was identified using a paper bed culture method in a culture dish.The results showed that salt stress treatment significantly reduced the germination potential,germination rate,and germination index of maize materials.Trait correlation analysis revealed a highly significant positive correlation between different traits.Using the salt tolerance rate during the germination period and combining with the clustering analysis results,the inbred and hybrid materials were divided into five salt tolerance levels:Level Ⅰ(high tolerance,4 inbred lines,17 hybrids),Level Ⅱ(tolerance,19 inbred lines,58 hybrids),Level Ⅲ(moderate tolerance,47 inbred lines,120 hybrids),Level Ⅳ(sensitive,33 inbred lines,71 hybrids),and Level Ⅴ(high sensitivity,49 inbred lines,37 hybrids).Based on the analysis of identity-by-descent(IBD)segments,146 inbred line materials were divided into 8 groups.The salt tolerance of different groups of inbred line materials was as follows:European maternal group＞Complex group＞Inbred line 330 group＞PB group＞Lancaster group＞Tangsipingtou group＞PA group＞Reid group.The hybrid materials are divided into 23 hybridization patterns based on the different parent material groups,among which European maternal group×PB group is the optimal heterosis pattern for salt stress tolerance during germination.This study identified the salt tolerance of inbred lines and hybrid materials,and selected 4 high salt tolerant inbred line materials and 17 high salt tolerant hybrid materials.关键词
玉米/自交系/杂交种/萌发期/耐盐性/杂种优势模式Key words
maize/inbred lines/hybrids/germination stage/salt tolerance/heterosis pattern引用本文复制引用
赵绍赓,刘晓强,王玉玺,徐佳睿,邓馨,郑军,王红武..玉米萌发期耐盐性评价及其杂种优势模式分析[J].植物遗传资源学报,2025,26(1):79-89,11.基金项目
国家重点研发计划(2023YFD1200500)National Key Research and Development Program of China(2023YFD1200500) （2023YFD1200500）
