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早衰小麦功能叶片从开花后自叶尖开始失绿坏死,缩短了后期功能叶片的光合时间,降低了光合效率,严重影响其子粒产量。以从小偃54×8602的F8高代品系中分离出的早衰和正常小麦近等基因系为试验材料,研究了二者的主要农艺性状差异及生育后期的光合作用,结果表明:早衰小麦的光合能力与同化产物的积累均比正常小麦低。研究早衰小麦的生理生化和遗传基础,对于理解小麦早衰成因、选育高产小麦品种具有重要的理论和实践意义。
Premature senescence wheat functional leaf chlorosis necrosis from the leaf tips after flowering, shortening the photosynthetic time of late functional leaves, reducing the photosynthetic efficiency, seriously affecting its grain yield. The progenies of the premature senility and normal wheat near isogenic lines isolated from the F8 lines of Xiaoyan 54 × 8602 were used as experimental materials to study the differences of the main agronomic traits and the photosynthesis in the later growth period. The results showed that photosynthesis of premature senility wheat Accumulation of ability and assimilation products were lower than normal wheat. Studying the physio-biochemical and genetic basis of premature senescence wheat has important theoretical and practical significance for understanding the genesis of premature senescence and breeding high-yielding wheat varieties.