Phenotyping of field-grown wheat in the UK highlights contribution of light response of photosynthesis and flag leaf longevity to grain yield.
Phenotyping of field-grown wheat in the UK highlights contribution of light response of photosynthesis and flag leaf longevity to grain yield.
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DOI：
10.1093/jxb/erx169
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发表时间：
2017-06-15
影响因子：
6.9
通讯作者：
Parry MAJ
中科院分区：
文献类型：
--
作者：
Carmo-Silva E;Andralojc PJ;Scales JC;Driever SM;Mead A;Lawson T;Raines CA;Parry MAJ
旗叶寿命和操作光合速率在环境中的CO2和一系列的光水平与粮食产量的英国田间生长的小麦，揭示了新的目标，以提高作物生产力。改善光合作用是提高作物产量和确保粮食安全的主要目标。田间光合作用的表型分析对于理解农业环境中作物性能的限制至关重要。然而，在田间生长的小麦光合性状的详细表型是相对稀缺的，以前的研究集中在狭窄的种质选择。比较了英国64个大田小麦品种的旗叶光合特性、作物发育和产量性状。花前和花后光合性状与籽粒产量和收获指数呈显著正相关。这些性状包括在环境CO2浓度和一系列光合光子通量密度下测量的净CO2同化，以及与光合作用的光响应相关的性状。在大多数品种中，光合作用下降花后相比，花前，这是与Rubisco活性和丰度下降。光合性状的遗传力表明，表型变异可以用来通知育种计划。在英国，特定的品种被鉴定为具有与作物产量增加育种相关的性状：开花前光合作用、开花后光合作用、光合作用的光响应和Rubisco量。结果表明，旗叶寿命和冠层中的光合活性可以进一步利用，以最大限度地提高英国面包小麦的籽粒灌浆。
Flag leaf longevity and operating photosynthetic rates at ambient CO2 and a range of light levels correlated with grain yield of UK field-grown wheat, revealing new targets to enhance crop productivity. Improving photosynthesis is a major target for increasing crop yields and ensuring food security. Phenotyping of photosynthesis in the field is critical to understand the limits to crop performance in agricultural settings. Yet, detailed phenotyping of photosynthetic traits is relatively scarce in field-grown wheat, with previous studies focusing on narrow germplasm selections. Flag leaf photosynthetic traits, crop development, and yield traits were compared in 64 field-grown wheat cultivars in the UK. Pre-anthesis and post-anthesis photosynthetic traits correlated significantly and positively with grain yield and harvest index (HI). These traits included net CO2 assimilation measured at ambient CO2 concentrations and a range of photosynthetic photon flux densities, and traits associated with the light response of photosynthesis. In most cultivars, photosynthesis decreased post-anthesis compared with pre-anthesis, and this was associated with decreased Rubisco activity and abundance. Heritability of photosynthetic traits suggests that phenotypic variation can be used to inform breeding programmes. Specific cultivars were identified with traits relevant to breeding for increased crop yields in the UK: pre-anthesis photosynthesis, post-anthesis photosynthesis, light response of photosynthesis, and Rubisco amounts. The results indicate that flag leaf longevity and operating photosynthetic activity in the canopy can be further exploited to maximize grain filling in UK bread wheat.
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影响因子：
2
作者：
Foulkes, M. J.;Snape, J. W.;Sylvester-Bradley, R.
通讯作者：
Sylvester-Bradley, R.
影响因子：
2.3
作者：
Fischer, R. A. (Tony);Edmeades, Gregory O.
通讯作者：
Edmeades, Gregory O.
干旱条件下三种不同 C4 草的 Rubisco 活性、特性和调节。
影响因子：
6.9
作者：
Carmo-Silva, A. Elizabete;Keys, Alfred J.;Andralojc, P. John;Powers, Stephen J.;Arrabaca, M. Celeste;Parry, Martin A. J.
通讯作者：
Parry, Martin A. J.
影响因子：
11.4
作者：
Hedden, P
通讯作者：
Hedden, P
DOI：
10.1198/108571106x154443
发表时间：
2006-12-01
影响因子：
1.4
作者：
Cullis, B. R.;Smith, A. B.;Coombes, N. E.
通讯作者：
Coombes, N. E.