Methods of recurrent selection and exploitation of heterosis in maize
Recurrent selection methods were designed to improve the agronomic value of populations by gradually increasing the frequency of favorable alleles, while maintaining genetic variability. To realize these objectives, progenies are developed, evaluated, selected and recombined in a repetitive manner....
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| Format: | Article |
| Language: | English |
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Serbian Association of Plant Breedings and Seed Producers
2004-01-01
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| Series: | Selekcija i Semenarstvo |
| Subjects: | |
| Online Access: | http://scindeks-clanci.ceon.rs/data/pdf/0354-5881/2004/0354-58810404005Z.pdf |
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| author | Živanović Tomislav Šurlan-Momirović Gordana Krstanović Saša |
| author_facet | Živanović Tomislav Šurlan-Momirović Gordana Krstanović Saša |
| author_sort | Živanović Tomislav |
| collection | DOAJ |
| description | Recurrent selection methods were designed to improve the agronomic value of populations by gradually increasing the frequency of favorable alleles, while maintaining genetic variability. To realize these objectives, progenies are developed, evaluated, selected and recombined in a repetitive manner. Populations improved by recurrent selection are excepted to be agronomically superior to unimproved versions and have enough genetic variability for the traits under selection to allow these populations be used for medium or long-term selection. The performance of hybrids is associated with the level of heterosis, i.e., to the superiority of hybrids over their inbred parents. To exploit heterosis efficiently, populations are grouped into heterotic groups, where population crosses within and among groups produce low and high levels of heterosis, respectively. Hybrids are then produced by crossing inbred lines from different heterotic group. Recurrent selection programs should be integrated with hybrid breeding programs so that improved populations can be used as sources of inbred lines not related to that ones developed from recycled lines via pedigree breeding. The objectives of this paper are to present the effects of recurrent selection on hybrid breeding programs; to present the changes in heterosis following recurrent selection; and to compare intra- and inter population recurrent selection. Testcross half-sib recurrent selection (TCHSRS) is for hybrid breeding programs, improvement of population crosses as well as the populations per se should be as efficient as possible, because their rates of improvement are approximately the same as for as the derived hybrids and inbred lines per se, respectively. The use of TCHSRS rather then RRS or HSRS would be the suitable strategy to accomplish the requirements of hybrid breeding programs. . |
| first_indexed | 2024-12-24T03:50:30Z |
| format | Article |
| id | doaj.art-3a6c0fe9d78d441c9dd021570accafcd |
| institution | Directory Open Access Journal |
| issn | 0354-5881 2406-209X |
| language | English |
| last_indexed | 2024-12-24T03:50:30Z |
| publishDate | 2004-01-01 |
| publisher | Serbian Association of Plant Breedings and Seed Producers |
| record_format | Article |
| series | Selekcija i Semenarstvo |
| spelling | doaj.art-3a6c0fe9d78d441c9dd021570accafcd2022-12-21T17:16:35ZengSerbian Association of Plant Breedings and Seed ProducersSelekcija i Semenarstvo0354-58812406-209X2004-01-01101-45130354-58810404005ZMethods of recurrent selection and exploitation of heterosis in maizeŽivanović Tomislav0Šurlan-Momirović Gordana1Krstanović Saša2University of Belgrade, Faculty of Agriculture, Belgrade, SerbiaUniversity of Belgrade, Faculty of Agriculture, Belgrade, SerbiaInstitute PKB Agroekonomik, Padinska skela, SerbiaRecurrent selection methods were designed to improve the agronomic value of populations by gradually increasing the frequency of favorable alleles, while maintaining genetic variability. To realize these objectives, progenies are developed, evaluated, selected and recombined in a repetitive manner. Populations improved by recurrent selection are excepted to be agronomically superior to unimproved versions and have enough genetic variability for the traits under selection to allow these populations be used for medium or long-term selection. The performance of hybrids is associated with the level of heterosis, i.e., to the superiority of hybrids over their inbred parents. To exploit heterosis efficiently, populations are grouped into heterotic groups, where population crosses within and among groups produce low and high levels of heterosis, respectively. Hybrids are then produced by crossing inbred lines from different heterotic group. Recurrent selection programs should be integrated with hybrid breeding programs so that improved populations can be used as sources of inbred lines not related to that ones developed from recycled lines via pedigree breeding. The objectives of this paper are to present the effects of recurrent selection on hybrid breeding programs; to present the changes in heterosis following recurrent selection; and to compare intra- and inter population recurrent selection. Testcross half-sib recurrent selection (TCHSRS) is for hybrid breeding programs, improvement of population crosses as well as the populations per se should be as efficient as possible, because their rates of improvement are approximately the same as for as the derived hybrids and inbred lines per se, respectively. The use of TCHSRS rather then RRS or HSRS would be the suitable strategy to accomplish the requirements of hybrid breeding programs. .http://scindeks-clanci.ceon.rs/data/pdf/0354-5881/2004/0354-58810404005Z.pdfmaizeheterosisrecurrent selectiontestcross half-sib recurrent selection |
| spellingShingle | Živanović Tomislav Šurlan-Momirović Gordana Krstanović Saša Methods of recurrent selection and exploitation of heterosis in maize Selekcija i Semenarstvo maize heterosis recurrent selection testcross half-sib recurrent selection |
| title | Methods of recurrent selection and exploitation of heterosis in maize |
| title_full | Methods of recurrent selection and exploitation of heterosis in maize |
| title_fullStr | Methods of recurrent selection and exploitation of heterosis in maize |
| title_full_unstemmed | Methods of recurrent selection and exploitation of heterosis in maize |
| title_short | Methods of recurrent selection and exploitation of heterosis in maize |
| title_sort | methods of recurrent selection and exploitation of heterosis in maize |
| topic | maize heterosis recurrent selection testcross half-sib recurrent selection |
| url | http://scindeks-clanci.ceon.rs/data/pdf/0354-5881/2004/0354-58810404005Z.pdf |
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