Carbon isotope discrimination,selection response,and forage production of tall Fescue in contrasting environments

摘要：

Carbon isotope discrimination ( Δ ) usually correlates with the dry matter to transpiration ratio ( transpiration efficiency, TE) in C3 species, with low Δ corresponding high TE.But its heritability and relationship to forage production is less clear.In a four year study of tall fescue ( Festuca arundinacea Schreb.) at Pullman, WA ( relatively cool with low humidity) and Ardmore, OK ( relatively hot with high humidity) we determined 1 ) if Δ differences in divergently selected populations made on single plants were maintained in solid seeded plots, and 2) how Δ in selected populations and a set of four cultivars was related to forage production.

关键词： Festuca arundinacea water use efficiency forage production drought

作者: R.C.Johnson A A.Hopkins M.A.Evans

作者单位: USDA-ARS,Box 646402,Washington State University,Pullman WA 99164,USA. Samuel Roberts Noble Foundation,Ardmore OK,USA Department of Statistics,Washington State University,Pullman WA 99164,USA

会议类型: 国际会议

会议名称: 2008世界草地与草原大会

会议地点: 呼和浩特

会议语种:英文

在线出版日期: 2008-06-29（万方平台首次上网日期，不代表论文的发表时间）