Author:
Niu Yanan,Chen Tianxiao,Zheng Zhi,Zhao Chenchen,Liu Chunji,Jia Jizeng,Zhou Meixue
Abstract
Abstract
Background
Carbohydrate accumulation of photosynthetic organs, mainly leaves, are the primary sources of grain yield in cereals. The flag leaf plays a vital role in seed development, which is probably the most neglected morphological characteristic during traditional selection processes.
Results
In this experiment, four flag leaf morphological traits and seven yield-related traits were investigated in a DH population derived from a cross between a wild barley and an Australian malting barley cultivar. Flag leaf thickness (FLT) showed significantly positive correlations with grain size. Four QTL, located on chromosomes 1H, 2H, 3H, and 5H, respectively, were identified for FLT. Among them, a major QTL was located on chromosome 3H with a LOD value of 18.4 and determined 32% of the phenotypic variation. This QTL showed close links but not pleiotropism to the previously reported semi-dwarf gene sdw1 from the cultivated barley. This QTL was not reported before and the thick leaf allele from the wild barley could provide a useful source for improving grain yield through breeding.
Conclusions
Our results also provided valuable evidence that source traits and sink traits in barley are tightly connected and suggest further improvement of barley yield potential with enhanced and balanced source and sink relationships by exploiting potentialities of the wild barley resources. Moreover, this study will provide a novel sight on understanding the evolution and development of leaf morphology in barley and improving barley production by rewilding for lost superior traits during plant evolution.
Funder
Grains Research and Development Corporation
Publisher
Springer Science and Business Media LLC
Reference87 articles.
1. Newton A, Flavell A, George T, Leat P, Mullholland B, Ramsay L, et al. Crops that feed the world 4. Barley: A resilient crop? Strengths and weaknesses in the context of food security. Food Secur. 2011;3:141–78.
2. Collins HM, Burton RA, Topping DL, Liao M, Bacic A, Fincher GB. Review: Variability in fine structures of noncellulosic cell wall polysaccharides from cereal grains: potential importance in human health and nutrition. Cereal Chem. 2010;87(4):272–82.
3. Ullrich S: Barley: Production, Improvement, and Uses. In.; 2011: 3-13.
4. Newman CW, Newman RK. A brief history of barley foods. Cereal Foods World. 2006;51:4–7.
5. Venkateswarlu B, Visperas RM. Source-sink relationships in crop plants; 1987.
Cited by
6 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献