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פותח על ידי קלירמאש פתרונות בע"מ -
Extensive heterosis in growth of yeast hybrids is explained by a combination of genetic models
Year:
2014
Source of publication :
Heredity
Authors :
פרידמן, איל
;
.
Volume :
113
Co-Authors:
Shapira, R., Department of Animal Sciences, RH Smith Faculty of Agriculture, Food and Environment, Hebrew University of Jerusalem, PO Box 12, Rehovot, Israel
Levy, T., Department of Animal Sciences, RH Smith Faculty of Agriculture, Food and Environment, Hebrew University of Jerusalem, PO Box 12, Rehovot, Israel
Shaked, S., Department of Animal Sciences, RH Smith Faculty of Agriculture, Food and Environment, Hebrew University of Jerusalem, PO Box 12, Rehovot, Israel, RH Smith Institute for Plant Sciences and Genetics, RH Smith Faculty of Agriculture, Food and Environment, Hebrew University of Jerusalem, Rehovot, Israel
Fridman, E., RH Smith Institute for Plant Sciences and Genetics, RH Smith Faculty of Agriculture, Food and Environment, Hebrew University of Jerusalem, Rehovot, Israel
David, L., Department of Animal Sciences, RH Smith Faculty of Agriculture, Food and Environment, Hebrew University of Jerusalem, PO Box 12, Rehovot, Israel
Facilitators :
From page:
316
To page:
326
(
Total pages:
11
)
Abstract:
Heterosis, also known as hybrid vigor, is the superior performance of a heterozygous hybrid relative to its homozygous parents. Despite the scientific curiosity of this phenotypic phenomenon and its significance for food production in agriculture, its genetic basis is insufficiently understood. Studying heterosis in yeast can potentially yield insights into its genetic basis, can allow one to test the different hypotheses that have been proposed to explain the phenomenon and allows better understanding of how to take advantage of this phenomenon to enhance food production. We therefore crossed 16 parental yeast strains to form 120 yeast hybrids, and measured their growth rates under five environmental conditions. A considerable amount of dominant genetic variation was found in growth performance, and heterosis was measured in 35% of the hybrid-condition combinations. Despite previous reports of correlations between heterosis and measures of sequence divergence between parents, we detected no such relationship. We used several analyses to examine which genetic model might explain heterosis. We found that dominance complementation of recessive alleles, overdominant interactions within loci and epistatic interactions among loci each contribute to heterosis. We concluded that in yeast heterosis is a complex phenotype created by the combined contribution of different genetic interactions. © 2014 Macmillan Publishers Limited All rights reserved.
Note:
Related Files :
biological model
Genetics
Growth, Development and Aging
Hybrid Vigor
Models, Genetic
Yeast
yeasts
עוד תגיות
תוכן קשור
More details
DOI :
10.1038/hdy.2014.33
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
30805
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:57
Scientific Publication
Extensive heterosis in growth of yeast hybrids is explained by a combination of genetic models
113
Shapira, R., Department of Animal Sciences, RH Smith Faculty of Agriculture, Food and Environment, Hebrew University of Jerusalem, PO Box 12, Rehovot, Israel
Levy, T., Department of Animal Sciences, RH Smith Faculty of Agriculture, Food and Environment, Hebrew University of Jerusalem, PO Box 12, Rehovot, Israel
Shaked, S., Department of Animal Sciences, RH Smith Faculty of Agriculture, Food and Environment, Hebrew University of Jerusalem, PO Box 12, Rehovot, Israel, RH Smith Institute for Plant Sciences and Genetics, RH Smith Faculty of Agriculture, Food and Environment, Hebrew University of Jerusalem, Rehovot, Israel
Fridman, E., RH Smith Institute for Plant Sciences and Genetics, RH Smith Faculty of Agriculture, Food and Environment, Hebrew University of Jerusalem, Rehovot, Israel
David, L., Department of Animal Sciences, RH Smith Faculty of Agriculture, Food and Environment, Hebrew University of Jerusalem, PO Box 12, Rehovot, Israel
Extensive heterosis in growth of yeast hybrids is explained by a combination of genetic models
Heterosis, also known as hybrid vigor, is the superior performance of a heterozygous hybrid relative to its homozygous parents. Despite the scientific curiosity of this phenotypic phenomenon and its significance for food production in agriculture, its genetic basis is insufficiently understood. Studying heterosis in yeast can potentially yield insights into its genetic basis, can allow one to test the different hypotheses that have been proposed to explain the phenomenon and allows better understanding of how to take advantage of this phenomenon to enhance food production. We therefore crossed 16 parental yeast strains to form 120 yeast hybrids, and measured their growth rates under five environmental conditions. A considerable amount of dominant genetic variation was found in growth performance, and heterosis was measured in 35% of the hybrid-condition combinations. Despite previous reports of correlations between heterosis and measures of sequence divergence between parents, we detected no such relationship. We used several analyses to examine which genetic model might explain heterosis. We found that dominance complementation of recessive alleles, overdominant interactions within loci and epistatic interactions among loci each contribute to heterosis. We concluded that in yeast heterosis is a complex phenotype created by the combined contribution of different genetic interactions. © 2014 Macmillan Publishers Limited All rights reserved.
Scientific Publication
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