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Radiation Interception Conversion and Partitioning Efficiency in Potato Landraces: How Far Are We from the Optimum?

机译：辐射拦截马铃薯实地的转换和分区效率：我们从最佳速度达到多远？

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Crop efficiencies associated with intercepted radiation, conversion into biomass and allocation to edible organs are essential for yield improvement strategies that would enhance genetic properties to maximize carbon gain without increasing crop inputs. The production of 20 potato landraces—never studied before—was analyzed for radiation interception (εi), conversion (εc) and partitioning (εp) efficiencies. Additionally, other physiological traits related to senescence delay (normalized difference vegetation index (NDVI)slp), tuberization precocity (tu), photosynthetic performance and dry tuber yield per plant (TY) were also assessed. Vegetation reflectance was remotely acquired and the efficiencies estimated through a process-based model parameterized by a time-series of airborne imageries. The combination of εi and εc, closely associated with an early tuber maturity and a NDVIslp explained 39% of the variability grouping the most productive genotypes. TY was closely correlated to senescence delay (rPearson = 0.74), indicating the usefulness of remote sensing methods for potato yield diversity characterization. About 89% of TY was explained by the first three principal components, associated mainly to tu, εc and εi, respectively. When comparing potato with other major crops, its εp is very close to the theoretical maximum. These findings suggest that there is room for improving εi and εc to enhance potato production.
机译：与截取的辐射相关的作物效率，转化为生物质和可食用器官的分配对产量改善策略至关重要，这将增强遗传性质以最大化碳增益而不增加作物投入。在分析辐射拦截（εi），转化（εc）和分区（εp）效率之前，在辐射拦截（εi）和分区（εp）效率的分析之前，从未研究过20次马铃薯实地性的生产。另外，还评估了与衰老延迟相关的其他与衰老延迟（归一化差异植被指数（NDVI）SLP），核化预致（TU），每植物（TY）的光合性能和干燥块茎产量有关的生理性状。植被反射率被远足，并通过基于过程的模型估计的效率由一系列空气传播的成像。 εi和εc的组合，与早期块茎成熟度密切相关，NDVISLP解释了39％的可变性分组最富有成效的基因型。 TY与衰老延迟（RPEARSON = 0.74）密切相关，表明马铃薯产量分集表征的遥感方法的有用性。大约89％的TY是由主要关联的TU，εc和εi相关的前三个主要成分解释。将马铃薯与其他主要作物比较时，其εp非常接近理论最大值。这些发现表明，有改善εi和εc的余地，以增强马铃薯生产。

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