|Table of Contents|

Kin selection in Lolium multiflorum L.(PDF)

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

Issue:
2016 06
Page:
1063-1068
Research Field:
Publishing date:

Info

Title:
Kin selection in Lolium multiflorum L.
Author(s):
LI Jie1 2 3 SUN Geng 1** WU Ning1 WANG Jing4 & HU Xia5
1Key Laboratory of Mountain Ecological Restoration and Bioresource, Utilization & Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China 2Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Nature Resources Research, Chinese Academy of Sciences, Beijing 100101, China 3University of Chinese Academy of Sciences, Beijing 100049, China 4Northwest Institute of Forest Inventory, Planning and Design, State Forestry Administration, Xi’an 710048, China 5Leshan Normal University, Leshan 614000, China
Keywords:
kin selection phenotypic characteristics biomass root distribution Lolium multiflorum L.
CLC:
Q346
PACS:
DOI:
10.3724/SP.J.1145.2015.12031
DocumentCode:

Abstract:
Related organisms living together could cooperate with each other according to kin selection theory of Hamilton, even at a cost of individual fitness, which is contrary to the niche partition theory. Previous studies proved the kin selection responses in some plant species. For example, plants show reduction of root distribution and other phenotypic changes to kin neighbors than strangers, in order to deduce competition among kin neighbors. However, since only a few species have been tested, kin responses of many other species remain unknown. In this research, we designed a pair-wise interaction model of each two individuals from 8 families to test whether and how species of Lolium multiflorum L. responded to kin selection. After the plants lifecycle, we measured for individual analysis the trait indexes of each plant including plant height, seed number, length and number of clusters, number and area of leaf, branching number, leaf, stem and reproduction biomass. On the group level we measured group leaf, stem, reproduction and root biomass. Our study showed less roots distribution in kin groups than stranger groups (P = 0.007), but no significant difference in leaf, stem and reproduction biomass on the group level. However, on individual level no significant difference was found between kin and stranger groups in either the measured traits (plant height, seed number, length and number of clusters, leaf number, leaf area, branching number) or biomass (leaf, stem and reproduction biomass). The results indicated that L. multiflorum L. responded positively to kin selection by reducing root competition in kin conditions to increase group fitness, and that root response could be a useful and available indicator to kin selection.

References

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Last Update: 2016-12-30