Selection Strategies for the Development of Maize Introgression Populations

Introgression libraries are valuable resources for QTL detection and breeding, but their development is costly and time-consuming. Selection strategies for the development of introgression populations with a limited number of individuals and high-throughput (HT) marker assays are required. The objec...

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Main Authors:	Herzog, Eva, Falke, Karen Christin, Presterl, Thomas, Scheuermann, Daniela, Ouzunova, Milena, Frisch, Matthias
Format:	Online
Language:	English
Published:	Public Library of Science 2014
Online Access:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3960358/

id	pubmed-3960358
recordtype	oai_dc
spelling	pubmed-39603582014-03-24 Selection Strategies for the Development of Maize Introgression Populations Herzog, Eva Falke, Karen Christin Presterl, Thomas Scheuermann, Daniela Ouzunova, Milena Frisch, Matthias Research Article Introgression libraries are valuable resources for QTL detection and breeding, but their development is costly and time-consuming. Selection strategies for the development of introgression populations with a limited number of individuals and high-throughput (HT) marker assays are required. The objectives of our simulation study were to design and compare selection strategies for the development of maize introgression populations of 100 lines with population sizes of 360–720 individuals per generation for different DH and crossing schemes. Pre-selection for complete donor chromosomes or donor chromosome halves reduced the number of simultaneous backcross programs. The investigated crossing and selection schemes differed considerably with respect to their suitability to create introgression populations with clearly separated, evenly distributed target donor chromosome segments. DH crossing schemes were superior to crossing schemes, mainly due to complete homozygosity, which greatly reduced the total number of disjunct genome segments in the introgression populations. The crossing schemes were more flexible with respect to selection and provided economic alternatives to DH crossing schemes. For the DH crossing schemes, increasing population sizes gradually over backcross generations was advantageous as it reduced the total number of required HT assays compared to constant population sizes. For the crossing schemes, large population sizes in the final backcross generation facilitated selection for the target segments in the final backcross generation and reduced fixation of large donor chromosome segments. The suggested crossing and selection schemes can help to make the genetic diversity of exotic germplasm available for enhancing the genetic variation of narrow-based breeding populations of crops. Public Library of Science 2014-03-19 /pmc/articles/PMC3960358/ /pubmed/24647313 http://dx.doi.org/10.1371/journal.pone.0092429 Text en © 2014 Herzog et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.
repository_type	Open Access Journal
institution_category	Foreign Institution
institution	US National Center for Biotechnology Information
building	NCBI PubMed
collection	Online Access
language	English
format	Online
author	Herzog, Eva Falke, Karen Christin Presterl, Thomas Scheuermann, Daniela Ouzunova, Milena Frisch, Matthias
spellingShingle	Herzog, Eva Falke, Karen Christin Presterl, Thomas Scheuermann, Daniela Ouzunova, Milena Frisch, Matthias Selection Strategies for the Development of Maize Introgression Populations
author_facet	Herzog, Eva Falke, Karen Christin Presterl, Thomas Scheuermann, Daniela Ouzunova, Milena Frisch, Matthias
author_sort	Herzog, Eva
title	Selection Strategies for the Development of Maize Introgression Populations
title_short	Selection Strategies for the Development of Maize Introgression Populations
title_full	Selection Strategies for the Development of Maize Introgression Populations
title_fullStr	Selection Strategies for the Development of Maize Introgression Populations
title_full_unstemmed	Selection Strategies for the Development of Maize Introgression Populations
title_sort	selection strategies for the development of maize introgression populations
description	Introgression libraries are valuable resources for QTL detection and breeding, but their development is costly and time-consuming. Selection strategies for the development of introgression populations with a limited number of individuals and high-throughput (HT) marker assays are required. The objectives of our simulation study were to design and compare selection strategies for the development of maize introgression populations of 100 lines with population sizes of 360–720 individuals per generation for different DH and crossing schemes. Pre-selection for complete donor chromosomes or donor chromosome halves reduced the number of simultaneous backcross programs. The investigated crossing and selection schemes differed considerably with respect to their suitability to create introgression populations with clearly separated, evenly distributed target donor chromosome segments. DH crossing schemes were superior to crossing schemes, mainly due to complete homozygosity, which greatly reduced the total number of disjunct genome segments in the introgression populations. The crossing schemes were more flexible with respect to selection and provided economic alternatives to DH crossing schemes. For the DH crossing schemes, increasing population sizes gradually over backcross generations was advantageous as it reduced the total number of required HT assays compared to constant population sizes. For the crossing schemes, large population sizes in the final backcross generation facilitated selection for the target segments in the final backcross generation and reduced fixation of large donor chromosome segments. The suggested crossing and selection schemes can help to make the genetic diversity of exotic germplasm available for enhancing the genetic variation of narrow-based breeding populations of crops.
publisher	Public Library of Science
publishDate	2014
url	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3960358/
_version_	1612069664933806080

Selection Strategies for the Development of Maize Introgression Populations

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