Characterization of Canopy Temperature in Bread Wheat Genotypes under Terminal Heat Stress

IF 1.3 4区综合性期刊 Q3 MULTIDISCIPLINARY SCIENCES National Academy Science Letters Pub Date : 2025-01-20 DOI:10.1007/s40009-025-01606-5

Anjali Tripathi, Girish Chandra Pandey

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Abstract

Canopy temperature (CT) is one of the important traits for evaluation/screening for high temperature tolerance in wheat crop. In our study genotypes are sowing variation in terms of canopy temperature. The ten wheat genotypes were assessed during the 2021–2022 rabi season using a precise phenotyping technique under both timely sown (TS) and late sown (LS) conditions. 7th day after anthesis (DAA), PBW644 showed the highest value 39.60C and PBW752 showed lowest value 31.1 °C in TS condition. DBW14 (Delhi bread wheat) showed the highest value 51.5 °C and PBW757(Punjab Bread Wheat) showed the lowest value 37.0 °C in LS condition. 14th DAA, AKW1071 (Akola wheat) showed highest value 40.4 °C and PBW752 showed lowest value 32.2 °C in TS condition. PBW644 showed highest value 48.5 °C and DBW71 showed lowest value 37.1 °C in LS condition. High canopy temperature implies reduced heat tolerance or sensitivity to high temperatures or limited moisture. Low canopy temperature suggests better adaptation to heat or drought conditions, possibly due to traits like increased transpiration rates or better water use efficiency.

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末热胁迫下面包小麦基因型的冠层温度特征

冠层温度是小麦作物耐高温性评价和筛选的重要指标之一。在我们的研究中，基因型是根据冠层温度的播种变化。采用精确表型技术，对2021-2022年rabi季节的10个小麦基因型进行了评估，并分别在早播（TS）和晚播（LS）条件下进行了表型分析。在TS条件下，花后第7天（DAA） PBW644最高39.60℃，PBW752最低31.1℃。LS条件下，德里面包小麦（DBW14）的最高温度为51.5°C，旁遮普面包小麦（PBW757）的最低温度为37.0°C。14号DAA中，AKW1071 （Akola小麦）在TS条件下最高温度为40.4°C， PBW752最低温度为32.2°C。LS条件下PBW644的最高温度为48.5°C， DBW71的最低温度为37.1°C。冠层温度高意味着耐热性或对高温或有限水分的敏感性降低。冠层温度低表明对高温或干旱条件有更好的适应，可能是由于蒸腾速率增加或水分利用效率提高等特征。

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来源期刊

National Academy Science Letters 综合性期刊-综合性期刊

CiteScore

2.20

自引率

0.00%

发文量

审稿时长

12 months

期刊介绍： The National Academy Science Letters is published by the National Academy of Sciences, India, since 1978. The publication of this unique journal was started with a view to give quick and wide publicity to the innovations in all fields of science