Abstract Detail

Ecological Section

Gao, Song [1], Chen, Luxi [1], Yan, Qiaodi [1], Du, Zhaokui [1], Ding, Weihang [1], Song, Yaobin [2], Chen, Jinsong [3], Li, Junmin [4], Dong, Ming [2], Liston, Aaron [5], Ashman, Tia-Lynn [6].

Diversity in functional traits of Chinese strawberries: effects of ploidy, geography and haplotype.

China is one of the diversity hotspots of Fragaria (Rosaceae) in the world. Fragaria species are all stoloniferous perennial herbs that share the same basic architecture and life history with ploidy levels varied from diploidy to decaploidy. Geographical patterns of genetic variation could be affected by ploidy differences and both could in turn affect phenotypic traits. In China, both diploidy and tetraploidy are found in Fragaria species and some diploid and tetraploid plants shared the same chloroplast haplotype. To better understand the diversity in vegetative traits of Chinese strawberries and how ploidy, geography and genetic variation together impact them, we grew 1266 plants representing up to 13 species from 105 locations collected across China and preliminarily analyzed their functional traits, including days to germination, maximum leaf length and width, leaf number, leaf color, stolon numbers, total stolon length and total plantlet numbers. All functional traits showed significant geographical pattern and some are affected by haplotypes and ploidy levels, especially days to germination, maximum leaf length, maximum leaf width and stolon numbers. Compared with diploids, Chinese tetraploid strawberries germinated later, had fewer leaves and more stolons, indicating that tetraploids had stronger capacity of clonal growth. CV values of all traits among haplotypes were similar, indicating a similar diversity for all haplotypes. The dimension reduction on 5 vegetative traits was analyzed using PCA, including days to germination, leaf color, maximum leaf length, maximum leaf width and leaf number. We found that the first and the second axis could explain most variance among different haplotypes. Days to germination and leaf color were negatively correlated with axis 1, while maximum leaf length and maximum leaf width positively correlated with axis1 and leaf number negatively correlated with axis 2. The PCA results did not reveal any relationship of vegetative traits among haplotypes and ploidy levels. These results showed that the diversity in vegetative traits of Chinese strawberries might be affected by the combination of ploidy, geography and chloroplast haplotype.

1 - Taizhou University, Zhejiang Provincial Key Laboratory of Evolutionary Ecology and Conservation, 1139# Shifu Road, Jiaojiang, Taizhou, ZJ, 318000, CN
2 - Hangzhou Normal University, Key Laboratory of Hangzhou City for Ecosystem Protection and Restoration, School of Life and environmental Sciences, Hangzhou Normal University, Hangzhou, ZJ, 311121, CN
3 - Sichuan Normal University, College of Life Science, Sichuan Normal University, Chengdu, SC, 610101, CN
4 - Taizhou University, Insitute Of Ecology, 1139 Shifu Road, Jiaojiang, Taizhou, Zhejiang, N/A, 318000, China
5 - Oregon State University, Department Of Botany & Plant Pathology, 2082 Cordley Hall, Corvallis, OR, 97331-2902, USA, 541/737-5301
6 - University of Pittsburgh, Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania, 15260, USA

Keywords:
diversity
plant functional trait
Polyploidy
Haplotype
Strawberry.

Presentation Type: Poster:Posters for Sections
Session: P
Location: Hall D/The Shaw Conference Centre
Date: Monday, July 27th, 2015
Time: 5:30 PM
Number: PEC020
Abstract ID:984
Candidate for Awards:None