QTL mapping for developmental behavior of plant height in wheat (<Emphasis Type="Italic">Triticum aestivum</Emphasis> L.) |
| |
Authors: | Zhenghang Wang Xianshan Wu Qian Ren Xiaoping Chang Runzhi Li Ruilian Jing |
| |
Institution: | (1) National Key Facility for Crop Gene Resources and Genetic Improvement/Key Laboratory of Crop Germplasm and Biotechnology, Ministry of Agriculture/Institute of Crop Science, Chinese Academy of Agricultural Sciences, 100081 Beijing, China;(2) Shanxi Agricultural University, 030801 Taigu, China; |
| |
Abstract: | A recombinant inbred line (RIL) population with 305 lines derived from a cross of Hanxuan 10 × Lumai 14 was used to identify
the dynamic quantitative trait loci (QTL) for plant height (PH) in wheat (Triticum aestivum L.). Plant heights of RILs were measured at five stages in three environments. Total of seven genomic regions covering PH
QTL clusters on different chromosomes identified from a DH population derived from the same cross as the RIL were used as
the candidate QTLs and extensively analyzed. Five additive QTLs and eight pairs of epistatic QTLs significantly affecting
plant height development were detected by unconditional QTL mapping method. Six additive QTLs and four pairs of epistatic
QTLs were identified using conditional mapping approach. Among them, three additive QTLs (QPh.cgb-1B.3, QPh.cgb-4D.1, QPh.cgb-5B.2) and three pairs of epistatic QTLs (QPh.cgb-1B.1–QPh.cgb-1B.3, QPh.cgb-2A.1–QPh.cgb-2D.1, QPh.cgb-2D.1–QPh.cgb-5B.2) were common QTLs detected by both methods. Three QTLs (QPh.cgb-4D.1, QPh.cgb-5B.3, QPh.cgb-5B.4) were expressed under both drought and well-water conditions. The present data are useful for wheat genetic manipulations
through molecular marker-assisted selection (MAS), and provides new insights into understanding the genetic mechanism and
regulation network underlying the development of plant height in crops. Our result in this study indicated that combining
unconditional and conditional mapping methods could make it possible to reveal not only the stable/conserved QTLs for the
developmental traits such as plant height but also the dynamic expression feature of the QTLs. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|