Natural variation in photosynthetic capacity, growth, and yield in 64 field-grown wheat genotypes.
Natural variation in photosynthetic capacity, growth, and yield in 64 field-grown wheat genotypes.
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DOI：
10.1093/jxb/eru253
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发表时间：
2014-09
影响因子：
6.9
通讯作者：
Parry MA
中科院分区：
文献类型：
--
作者：
Driever SM;Lawson T;Andralojc PJ;Raines CA;Parry MA
64个小麦品种光合作用和生长的显著差异可以解释为光合能力、运作和CO2扩散的差异。光合作用的自然变异是一种未被充分利用的作物改良资源。增加小麦的光合作用已被确定为提高作物产量的一种方法，目前正在探索操纵参与电子传递和卡尔文循环的关键基因。然而，光合能力的自然变异是目前尚未开发的潜在作物改良遗传资源。利用气体交换分析和蛋白质分析，研究了64个大田优质小麦品种光合能力在生物量和收获指数等生长性状方面的自然变异。各品种的光合能力、生物量和产量均存在显著差异，但旗叶光合能力与籽粒产量之间没有一致的相关性。光合作用的大部分变化可以用与CO2同化的最大容量和运行速率以及CO2扩散有关的成分来解释。聚类分析表明，品种可能是在无意中以牺牲光合能力为代价而培育出理想性状的。这些结果表明，现有小麦品种的光合能力明显未被充分利用。我们的观察是在利用现有的生理过程中的自然变异来改善小麦光合作用的背景下讨论的。
Significant variation in photosynthesis and growth in 64 wheat cultivars was explained by differences in photosynthetic capacity, operation and CO2 diffusion. Natural variation in photosynthesis is an underutilized resource for potential crop improvement. Increasing photosynthesis in wheat has been identified as an approach to enhance crop yield, with manipulation of key genes involved in electron transport and the Calvin cycle as one avenue currently being explored. However, natural variation in photosynthetic capacity is a currently unexploited genetic resource for potential crop improvement. Using gas-exchange analysis and protein analysis, the existing natural variation in photosynthetic capacity in a diverse panel of 64 elite wheat cultivars grown in the field was examined relative to growth traits, including biomass and harvest index. Significant variations in photosynthetic capacity, biomass, and yield were observed, although no consistent correlation was found between photosynthetic capacity of the flag leaf and grain yield when all cultivars were compared. The majority of the variation in photosynthesis could be explained by components related to maximum capacity and operational rates of CO2 assimilation, and to CO2 diffusion. Cluster analysis revealed that cultivars may have been bred unintentionally for desirable traits at the expense of photosynthetic capacity. These findings suggest that there is significant underutilized photosynthetic capacity among existing wheat varieties. Our observations are discussed in the context of exploiting existing natural variation in physiological processes for the improvement of photosynthesis in wheat.
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影响因子：
6.9
作者：
Aranjuelo I;Sanz-Sáez Á;Jauregui I;Irigoyen JJ;Araus JL;Sánchez-Díaz M;Erice G
通讯作者：
Erice G
影响因子：
6.9
作者：
Hubbart, S.;Peng, S.;Murchie, E. H.
通讯作者：
Murchie, E. H.
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：
7.3
作者：
Gu, Junfei;Yin, Xinyou;Struik, Paul C.
通讯作者：
Struik, Paul C.
影响因子：
2
作者：
BLUM, A
通讯作者：
BLUM, A