Plant height (PH) plays a very important role for plant breeding and also serves as a model trait to dynamic development study. The dynamic quantitative trait locus (QTL) analysis for PH of Agropyron Gaertn. was carried out in a cross‐pollination (CP) hybrid population of A. Gaertn. based on the phenotypic data of PH at different developmental stages in four year‐sites and the constructed single‐nucleotide polymorphism (SNP) genetic map. The results showed that 69 QTL and nine major QTL were detected by unconditional QTL mapping. A total of 107 QTL and 13 major QTL were found using conditional QTL mapping. Forty‐seven QTL were detected by two methods. Two unconditional QTL, Qph2‐5 and Qph3‐4, were expressed as major and stable QTL for PH. Four major stable conditional QTL for PH, cQph4‐1, cQph4‐8, cQph6‐2 and cQph6‐7, were detected. Two conditional PH QTL, cQph3‐5 and cQPh3‐7, were identified in four environments over multiple stages. The gene/QTL controlling PH was expressed in a certain spatiotemporal manner. These results could also provide a reference for genetic and breeding research of related plant.

中文翻译：

---

Agropyron Gaertn杂交种群中植物高度的动态QTL定位。

株高（PH）在植物育种中起着非常重要的作用，并且也是动态发育研究的典范特征。Agropyron Gaertn pH值的动态定量性状基因座（QTL）分析。在A. Gaertn的异花授粉（CP）杂交种群中进行。基于四年位点不同发育阶段PH的表型数据和构建的单核苷酸多态性（SNP）遗传图谱。结果显示，通过无条件QTL映射检测到69个QTL和9个主要QTL。使用条件性QTL映射共发现107个QTL和13个主要QTL。通过两种方法检测到47个QTL。两个无条件QTL，Qph2-5和Qph3-4，被表示为PH的主要且稳定的QTL。已检测到PH的四个主要的稳定条件QTL，即cQph4-1，cQph4-8，cQph6-2和cQph6-7。在多个阶段的四个环境中，确定了两个条件PH QTL cQph3-5和cQPh3-7。控制PH的基因/ QTL以一定的时空表达。这些结果也可为相关植物的遗传育种研究提供参考。