globalchange  > 气候减缓与适应
DOI: 10.1007/s40333-018-0018-x
WOS记录号: WOS:000458965000006
论文题名:
Variation and heritability of morphological and physiological traits among Leymus chinensis genotypes under different environmental conditions
作者: Yang Xue; Li Junpeng; Zhao Tingting; Mo Lidong; Zhang Jianli; Ren Huiqin; Zhao Nianxi; Gao Yubao
通讯作者: Zhao Nianxi
刊名: JOURNAL OF ARID LAND
ISSN: 1674-6767
EISSN: 2194-7783
出版年: 2019
卷: 11, 期:1, 页码:66-74
语种: 英语
英文关键词: Leymus chinensis ; genotype ; quantitative trait variation ; heritability ; drought ; high temperature
WOS关键词: PHENOTYPIC PLASTICITY ; GENETIC DIVERSITY ; EVOLUTION ; STABILITY ; POPULATION ; STRESS ; SALT
WOS学科分类: Environmental Sciences
WOS研究方向: Environmental Sciences & Ecology
英文摘要:

Intraspecific trait variation and heritability in different environmental conditions not only suggest a potential for an evolutionary response but also have important ecological consequences at the population, community, and ecosystem levels. However, the contribution of quantitative trait variation within a grassland species to evolutionary responses or ecological consequences is seldom documented. Leymus chinensis is an important dominant species in semi-arid grasslands of China, which has seriously suffered from drought and high temperature stresses in recent decades. In the present study, we measured variation and heritability of 10 quantitative traits, namely the number of tillers, maximum shoot height, number of rhizomes, maximum rhizome length, rhizome mass, aboveground mass, root mass, maximum net photosynthetic rate (P (max)), specific leaf area (SLA), and leaf length to leaf width ratio (L-L/L-W), for 10 genotypes of L. chinensis under one non-stress (Ck) condition and three environmental stress conditions (i.e., drought (Dr), high temperature (Ht), and both drought and high temperature (DrHt)). Result indicated that (1) the interaction of genotype and environmental condition (GxE) was significant for 6 traits but not significant for the other 4 traits as shown by two-way analysis of variance (ANOVA), suggesting that different selection forces were placed for different traits on the factors dominating phenotypic responses to different environmental conditions. Moreover, these significant GxE effects on traits indicated significantly different phenotypic adaptive responses among L. chinensis genotypes to different environmental conditions. Additionally, individuals could be grouped according to environmental condition rather than genotype as shown by canonical discriminant analysis, indicating that environmental condition played a more important role in affecting phenotypic variation than genotype; (2) by one-way ANOVA, significant differences among L. chinensis genotypes were found in all 10 traits under Ck and Dr conditions, in 8 traits under DrHt condition and only in 4 traits under Ht condition; and (3) all 10 traits showed relatively low or non-measurable broad-sense heritability (H (2)) under stress conditions. However, the lowest H (2) value for most traits did not occur under DrHt condition, which supported the hypothesis of 'unfavorable conditions have unpredictable effects' rather than 'unfavorable conditions decrease heritability'. Results from our experiment might aid to improve predictions on the potential impacts of climate changes on L. chinensis and eventually species conservation and ecosystem restoration.


Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/129066
Appears in Collections:气候减缓与适应

Files in This Item:

There are no files associated with this item.


作者单位: Nankai Univ, Coll Life Sci, Dept Plant Biol & Ecol, Tianjin 300071, Peoples R China

Recommended Citation:
Yang Xue,Li Junpeng,Zhao Tingting,et al. Variation and heritability of morphological and physiological traits among Leymus chinensis genotypes under different environmental conditions[J]. JOURNAL OF ARID LAND,2019-01-01,11(1):66-74
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[Yang Xue]'s Articles
[Li Junpeng]'s Articles
[Zhao Tingting]'s Articles
百度学术
Similar articles in Baidu Scholar
[Yang Xue]'s Articles
[Li Junpeng]'s Articles
[Zhao Tingting]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[Yang Xue]‘s Articles
[Li Junpeng]‘s Articles
[Zhao Tingting]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.