棉花杂种优势的光合生理基础及耐高温品种筛选指标研究

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棉花产量性状有明显的杂种优势,叶片光合作用是产量形成的基础,而棉花光合作用的杂种优势表现特点及其与产量的关系尚少见研究。叶片的光合作用与温度有密切的关系,棉花的生长期在夏季,常会遇到极端高温天气,高温对叶片的光合作用有不良影响,棉花产量和品质的形成也会受到影响。目前,棉花叶片光合作用耐高温筛选指标尚未确定。这些问题影响到棉花光合作用耐高温品种的选育。本文针对这些问题开展研究。本文以两个杂交棉组合泗杂3号和中棉48号为材料,测定杂交品种及其父、母本在高温、强光和不同C02浓度下的气体交换参数和
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