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Consequences of hybridization and heterozygosity on plant vigor and phenotypic stability
Year:
2015
Source of publication :
Plant Science
Authors :
Fridman, Eyal
;
.
Volume :
232
Co-Authors:
Fridman, E., Institute of Plant Science, Agricultural Research Organization (ARO), The Volcani Center, P.O. Box 6, Bet Dagan, Israel
Facilitators :
From page:
35
To page:
40
(
Total pages:
6
)
Abstract:
The genomic makeup and phenotypes of plants are diversifying, in part due to artificial or natural selection in agricultural and natural environments. Utilization of these variations to enhance crop productivity requires an understanding of the relationships between genotype and phenotype in inbreds and hybrids derived from crosses between these populations. This review highlights recent studies on hybrid vigor (heterosis) and the related phenomenon of hybrid weakness - two types of non-additive inheritance. Heterosis is a phenomenon whereby the phenotype of first-generation hybrids is superior to that of their parents. Intralocus interactions between alleles, complementation of dominant alleles, or inter-loci epistatic interactions are genetic mechanisms that may cause non-additive phenotypic inheritance in hybrids. However, there are different views on what portion of the heterotic variation is modulated by each of these mechanisms. Another aspect of plant vigor is phenotypic stability or robustness in different environments and how this is influenced by gene heterozygosity. Hybrids are not necessarily more phenotypically stable than inbreds since local heterozygosity might be associated with negative effects on biochemical activities. This review integrates genetic and biochemical considerations to illustrate how these relationships may be tightly linked with breeding system and sequence divergence. © 2014 Elsevier Ireland Ltd.
Note:
Related Files :
Canalization
Genetics
Heterozygote
hybridization
phenotype
plant
Plants
Stability
Show More
Related Content
More details
DOI :
10.1016/j.plantsci.2014.11.014
Article number:
Affiliations:
Database:
Scopus
Publication Type:
Review
;
.
Language:
English
Editors' remarks:
ID:
30601
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:55
Scientific Publication
Consequences of hybridization and heterozygosity on plant vigor and phenotypic stability
232
Fridman, E., Institute of Plant Science, Agricultural Research Organization (ARO), The Volcani Center, P.O. Box 6, Bet Dagan, Israel
Consequences of hybridization and heterozygosity on plant vigor and phenotypic stability
The genomic makeup and phenotypes of plants are diversifying, in part due to artificial or natural selection in agricultural and natural environments. Utilization of these variations to enhance crop productivity requires an understanding of the relationships between genotype and phenotype in inbreds and hybrids derived from crosses between these populations. This review highlights recent studies on hybrid vigor (heterosis) and the related phenomenon of hybrid weakness - two types of non-additive inheritance. Heterosis is a phenomenon whereby the phenotype of first-generation hybrids is superior to that of their parents. Intralocus interactions between alleles, complementation of dominant alleles, or inter-loci epistatic interactions are genetic mechanisms that may cause non-additive phenotypic inheritance in hybrids. However, there are different views on what portion of the heterotic variation is modulated by each of these mechanisms. Another aspect of plant vigor is phenotypic stability or robustness in different environments and how this is influenced by gene heterozygosity. Hybrids are not necessarily more phenotypically stable than inbreds since local heterozygosity might be associated with negative effects on biochemical activities. This review integrates genetic and biochemical considerations to illustrate how these relationships may be tightly linked with breeding system and sequence divergence. © 2014 Elsevier Ireland Ltd.
Scientific Publication
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