Wang Lifang, Sun Jutao, Wang Chenyang, Shangguan Zhouping
Agronomy College/National Engineering Research Center for Wheat, Henan Agricultural University, Zhengzhou, China.
College of Tobacco Science, Henan Agricultural University, Zhengzhou, China.
PeerJ. 2018 Sep 28;6:e5532. doi: 10.7717/peerj.5532. eCollection 2018.
Improving photosynthetic capacity significantly affects the yield of wheat ( L.) in rainfed regions. In this study, the physiological characteristics of eight large-spike wheat lines were compared with a multiple-spike cultivar as a control (CK) in a field over two consecutive seasons: 2010-2012. The tillering peak was 7-21 d after returning green for line 2040, the average rate of decline of relative water content was slower, and the average duration time of photosynthetic rate was longer than CK . There was a strong linear and positive correlation between photosynthetic rate and root activity at jointing, flowering, and grain-filling stages. In addition, average yields were higher in large-spike lines than CK (multiple-spike cultivar). The results suggest that large-spike lines might have greater water retaining capacity during yield formation under rainfed conditions.
提高光合能力对雨养地区小麦（L.）产量有显著影响。本研究在2010 - 2012年连续两个生长季的田间，将8个大穗型小麦品系的生理特性与一个多穗型品种（对照，CK）进行了比较。2040品系返青后7 - 21天达到分蘖高峰，相对含水量平均下降速率较慢，光合速率平均持续时间比对照长。在拔节期、开花期和灌浆期，光合速率与根系活力之间存在强烈的线性正相关。此外，大穗型品系的平均产量高于对照（多穗型品种）。结果表明，在雨养条件下，大穗型品系在产量形成过程中可能具有更强的保水能力。
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