Physiological characterization of recombinant inbred lines of barley with contrasting levels of carbon isotope discrimination

被引:6
|
作者
Chen, Jing [1 ,2 ]
Chang, Scott X. [1 ]
Anyia, Anthony O. [3 ]
机构
[1] Univ Alberta, Dept Renewable Resources, Edmonton, AB T6G 2E3, Canada
[2] Tongji Univ, Dept Landscape Studies, Coll Architecture & Urban Planning, Shanghai 20092, Peoples R China
[3] Alberta Innovates Technol Futures, Vegreville, AB T9C 1T4, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
Canonical discriminant analysis (CDA); Drought tolerance; Genotypic variation; The Canadian Prairies; Water-use efficiency (WUE); WATER-USE EFFICIENCY; QUANTITATIVE TRAIT LOCI; LEAF GAS-EXCHANGE; FIELD-GROWN BARLEY; TRANSPIRATION EFFICIENCY; DURUM-WHEAT; GRAIN-YIELD; ENVIRONMENT INTERACTION; STOMATAL CONDUCTANCE; CANADIAN PRAIRIES;
D O I
10.1007/s11104-012-1578-8
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Carbon isotope discrimination (Delta C-13) in C-3 plants used as an indirect measure of water-use efficiency (WUE) provides a tool for selecting crops with high WUE under dry environments. We evaluated the physiology and Delta C-13 of a set of 8 F-5 recombinant inbred lines (RILs) with contrasting levels of leaf Delta C-13 derived from two parents, 'W89001002003' (low Delta C-13) and 'I60049' (high Delta C-13) of six-row barley (Hordeum vulgare L.) in a greenhouse and under field conditions in three locations (Lacombe, Vegreville and Castor). In the greenhouse experiment, seven days of water deficit was imposed at the stem elongation stage followed by re-watering to pre-deficit level. A significant negative relationship between WUE and leaf Delta C-13 was observed. Under water-deficit conditions, both photosynthetic rate (A) and stomatal conductance (g (s) ) were significantly reduced with a strong positive correlation (r = 0.89) between the two, and the variation in g (s) was proportionally greater than A. The low leaf-Delta C-13 RIL '147' maintained the highest A and g (s) among ten genotypes (RILs and parents) under water-deficit conditions. Leaf Delta C-13 was positively correlated with biomass and grain yield in the field trials. Multivariate analysis of leaf Delta C-13, harvest index and plant height discriminated genotypes into three clusters: drought sensitive, drought tolerant and an intermediate type. The study suggests that it is possible to select low Delta C-13 lines such as RIL '147', which is able to maintain or produce high yields under low moisture conditions on the Canadian Prairies.
引用
收藏
页码:335 / 349
页数:15
相关论文
共 50 条