Abstract: Salinity Tolerance and Sequence Diversity in Candidate Genes of Perennial Ryegrass. (ASA, CSSA and SSSA Annual Meetings (Cincinnati, OH- Oct. 21

256-5Salinity Tolerance and Sequence Diversity in Candidate Genes of Perennial Ryegrass.

See more from this Division: C05 Turfgrass Science
See more from this Session: Breeding, Genetics and Stress Tolerance of Turfgrasses

Tuesday, October 23, 2012

Duke Energy Convention Center, Exhibit Hall AB, Level 1

Jinchi Tang¹, Xiaoqing Yu², Na Luo³, James J. Camberato² and Yiwei Jiang⁴, (1)Tea Research Institute, Guangdong Academy of Agricultural Science, Guangzhou, China
(2)Agronomy, Purdue University, West Lafayette, IN
(3)College of Horticulture, Nanjing Agricultural University, Nanjing, China
(4)915 W. State St., Purdue University, West Lafayette, IN

The objective of the research is to identify natural variation of salinity tolerance of perennial ryegrass and sequence diversity of candidate genes linked to salinity tolerance. Salinity responses of 56 perennial ryegrass accessions to salinity stress (300 mM NaCl) were evaluated. Salinity stress decreased plant height, chlorophyll content, leaf water content, dry weight and leaf ratio of K⁺/Na⁺, but increased total water-soluble carbohydrate and leaf Na⁺ contents. Large variations in growth and physiological traits were found among the accessions exposed to NaCl stress. Sequence diversity in candidate genes involved in salt tolerance such as aquaporin and Na⁺, K⁺ transporters are being analyzed. The results can be used to further conduct gene-trait association analysis of perennial ryegrass.

See more from this Division: C05 Turfgrass Science
See more from this Session: Breeding, Genetics and Stress Tolerance of Turfgrasses

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