Meta-analysis of grain yield QTL identified during agricultural drought in grasses showed consensus
In the last few years, efforts have been made to identify large effect QTL for grain yield under drought in rice. However, identification of most precise and consistent QTL across the environments and genetics backgrounds is essential for their successful use in Marker-assisted Selection. In this st...
| Autores principales: | , , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
Springer
2011
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/165886 |
| _version_ | 1855532460465455104 |
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| author | Swamy, B.P. Mallikarjuna Vikram, Prashant Dixit, Shalabh Ahmed, H.U. Kumar, Arvind |
| author_browse | Ahmed, H.U. Dixit, Shalabh Kumar, Arvind Swamy, B.P. Mallikarjuna Vikram, Prashant |
| author_facet | Swamy, B.P. Mallikarjuna Vikram, Prashant Dixit, Shalabh Ahmed, H.U. Kumar, Arvind |
| author_sort | Swamy, B.P. Mallikarjuna |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | In the last few years, efforts have been made to identify large effect QTL for grain yield under drought in rice. However, identification of most precise and consistent QTL across the environments and genetics backgrounds is essential for their successful use in Marker-assisted Selection. In this study, an attempt was made to locate consistent QTL regions associated with yield increase under drought by applying a genome-wide QTL meta-analysis approach.The integration of 15 maps resulted in a consensus map with 531 markers and a total map length of 1821 cM. Fifty-three yield QTL reported in 15 studies were projected on a consensus map and meta-analysis was performed. Fourteen meta-QTL were obtained on seven chromosomes. MQTL1.2, MQTL1.3, MQTL1.4, and MQTL12.1 were around 700 kb and corresponded to a reasonably small genetic distance of 1.8 to 5 cM and they are suitable for use in marker-assisted selection (MAS). The meta-QTL for grain yield under drought coincided with at least one of the meta-QTL identified for root and leaf morphology traits under drought in earlier reports. Validation of major-effect QTL on a panel of random drought-tolerant lines revealed the presence of at least one major QTL in each line. DTY 12.1 was present in 85% of the lines, followed by DTY 4.1 in 79% and DTY 1.1 in 64% of the lines. Comparative genomics of meta-QTL with other cereals revealed that the homologous regions of MQTL1.4 and MQTL3.2 had QTL for grain yield under drought in maize, wheat, and barley respectively. The genes in the meta-QTL regions were analyzed by a comparative genomics approach and candidate genes were deduced for grain yield under drought. Three groups of genes such as stress-inducible genes, growth and development-related genes, and sugar transport-related genes were found in clusters in most of the meta-QTL.Meta-QTL with small genetic and physical intervals could be useful in Marker-assisted selection individually and in combinations. Validation and comparative genomics of the major-effect QTL confirmed their consistency within and across the species. The shortlisted candidate genes can be cloned to unravel the molecular mechanism regulating grain yield under drought. |
| format | Journal Article |
| id | CGSpace165886 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2011 |
| publishDateRange | 2011 |
| publishDateSort | 2011 |
| publisher | Springer |
| publisherStr | Springer |
| record_format | dspace |
| spelling | CGSpace1658862025-05-14T10:24:19Z Meta-analysis of grain yield QTL identified during agricultural drought in grasses showed consensus Swamy, B.P. Mallikarjuna Vikram, Prashant Dixit, Shalabh Ahmed, H.U. Kumar, Arvind chromosome mapping chromosomes comparative genomics drought drought resistance drought stress genes genetic distance genotypes grain yield maize plant water relations quantitative trait loci wheat In the last few years, efforts have been made to identify large effect QTL for grain yield under drought in rice. However, identification of most precise and consistent QTL across the environments and genetics backgrounds is essential for their successful use in Marker-assisted Selection. In this study, an attempt was made to locate consistent QTL regions associated with yield increase under drought by applying a genome-wide QTL meta-analysis approach.The integration of 15 maps resulted in a consensus map with 531 markers and a total map length of 1821 cM. Fifty-three yield QTL reported in 15 studies were projected on a consensus map and meta-analysis was performed. Fourteen meta-QTL were obtained on seven chromosomes. MQTL1.2, MQTL1.3, MQTL1.4, and MQTL12.1 were around 700 kb and corresponded to a reasonably small genetic distance of 1.8 to 5 cM and they are suitable for use in marker-assisted selection (MAS). The meta-QTL for grain yield under drought coincided with at least one of the meta-QTL identified for root and leaf morphology traits under drought in earlier reports. Validation of major-effect QTL on a panel of random drought-tolerant lines revealed the presence of at least one major QTL in each line. DTY 12.1 was present in 85% of the lines, followed by DTY 4.1 in 79% and DTY 1.1 in 64% of the lines. Comparative genomics of meta-QTL with other cereals revealed that the homologous regions of MQTL1.4 and MQTL3.2 had QTL for grain yield under drought in maize, wheat, and barley respectively. The genes in the meta-QTL regions were analyzed by a comparative genomics approach and candidate genes were deduced for grain yield under drought. Three groups of genes such as stress-inducible genes, growth and development-related genes, and sugar transport-related genes were found in clusters in most of the meta-QTL.Meta-QTL with small genetic and physical intervals could be useful in Marker-assisted selection individually and in combinations. Validation and comparative genomics of the major-effect QTL confirmed their consistency within and across the species. The shortlisted candidate genes can be cloned to unravel the molecular mechanism regulating grain yield under drought. 2011-12 2024-12-19T12:55:36Z 2024-12-19T12:55:36Z Journal Article https://hdl.handle.net/10568/165886 en Springer Swamy, BP Mallikarjuna; Vikram, Prashant; Dixit, Shalabh; Ahmed, HU and Kumar, Arvind. 2011. Meta-analysis of grain yield QTL identified during agricultural drought in grasses showed consensus. BMC Genomics, Volume 12, no. 1 |
| spellingShingle | chromosome mapping chromosomes comparative genomics drought drought resistance drought stress genes genetic distance genotypes grain yield maize plant water relations quantitative trait loci wheat Swamy, B.P. Mallikarjuna Vikram, Prashant Dixit, Shalabh Ahmed, H.U. Kumar, Arvind Meta-analysis of grain yield QTL identified during agricultural drought in grasses showed consensus |
| title | Meta-analysis of grain yield QTL identified during agricultural drought in grasses showed consensus |
| title_full | Meta-analysis of grain yield QTL identified during agricultural drought in grasses showed consensus |
| title_fullStr | Meta-analysis of grain yield QTL identified during agricultural drought in grasses showed consensus |
| title_full_unstemmed | Meta-analysis of grain yield QTL identified during agricultural drought in grasses showed consensus |
| title_short | Meta-analysis of grain yield QTL identified during agricultural drought in grasses showed consensus |
| title_sort | meta analysis of grain yield qtl identified during agricultural drought in grasses showed consensus |
| topic | chromosome mapping chromosomes comparative genomics drought drought resistance drought stress genes genetic distance genotypes grain yield maize plant water relations quantitative trait loci wheat |
| url | https://hdl.handle.net/10568/165886 |
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