Contribution of genes related to grain number (Gn1a and WFP) introgressed into NERICA 1 to grain yield under tropical highland conditions in central Kenya
ABSTRACTIn Kenya and many other African countries, improving rice productivity is vital for future food security. To improve rice productivity in Kenya, near-isogenic lines (NIL) were developed by introducing Gn1a and WFP, genes that function to increase grain number per panicle by increasing second...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2023-07-01
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| Series: | Plant Production Science |
| Subjects: | |
| Online Access: | https://www.tandfonline.com/doi/10.1080/1343943X.2023.2245127 |
| _version_ | 1797745050154696704 |
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| author | Mayumi Kikuta Daniel Makori Menge Emily Waringa Gichuhi Hiroaki Samejima Rena Tomita John Munji Kimani Ruth Nzisa Musila Kazuyuki Doi Motoyuki Ashikari Rosalyn Angeles-Shim Kshirod Kumar Jena Daigo Makihara |
| author_facet | Mayumi Kikuta Daniel Makori Menge Emily Waringa Gichuhi Hiroaki Samejima Rena Tomita John Munji Kimani Ruth Nzisa Musila Kazuyuki Doi Motoyuki Ashikari Rosalyn Angeles-Shim Kshirod Kumar Jena Daigo Makihara |
| author_sort | Mayumi Kikuta |
| collection | DOAJ |
| description | ABSTRACTIn Kenya and many other African countries, improving rice productivity is vital for future food security. To improve rice productivity in Kenya, near-isogenic lines (NIL) were developed by introducing Gn1a and WFP, genes that function to increase grain number per panicle by increasing secondary and primary rachis-branches, into NERICA 1, a registered variety in Kenya. The aim of this study was to determine whether the introduction of these genes has the potential to improve rice productivity under tropical highland conditions in central Kenya. Field experiments were conducted in 2016 and 2017 at a lowland rice field in Mwea, Kenya, under different nitrogen fertilization conditions using three lines of NERICA 1 introgressed with Gn1a and/or WFP (NIL-Gn1a, NIL-WFP, and NIL-Gn1a+WFP) and their recurrent parents, NERICA 1. Two years of field experiments revealed that the introgression lines enhanced grain yield by increasing the number of primary and secondary rachis-branches and the number of grains per panicle. Gn1a and WFP showed additive effects and the introgression of both genes alleviated the negative effects on yield components observed in the introgressed lines, resulting in higher grain yield. Sufficient nitrogen fertilization was required to increase yield in the single-gene introgression lines. However, the line with both Gn1a and WFP achieved reasonable yields even under low fertilizer conditions in Mwea, Kenya. As these introgression lines have similar growing characteristics to their parent variety, they are expected to contribute to increased rice production in Kenya and similar environments in sub-Saharan Africa. |
| first_indexed | 2024-03-12T15:17:56Z |
| format | Article |
| id | doaj.art-61927c438b3544f0a6a47cbb58847cbe |
| institution | Directory Open Access Journal |
| issn | 1343-943X 1349-1008 |
| language | English |
| last_indexed | 2024-03-12T15:17:56Z |
| publishDate | 2023-07-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Plant Production Science |
| spelling | doaj.art-61927c438b3544f0a6a47cbb58847cbe2023-08-11T11:04:43ZengTaylor & Francis GroupPlant Production Science1343-943X1349-10082023-07-0126330931910.1080/1343943X.2023.2245127Contribution of genes related to grain number (Gn1a and WFP) introgressed into NERICA 1 to grain yield under tropical highland conditions in central KenyaMayumi Kikuta0Daniel Makori Menge1Emily Waringa Gichuhi2Hiroaki Samejima3Rena Tomita4John Munji Kimani5Ruth Nzisa Musila6Kazuyuki Doi7Motoyuki Ashikari8Rosalyn Angeles-Shim9Kshirod Kumar Jena10Daigo Makihara11Graduate School of Integrated Sciences for Life, Hiroshima University, Higashihiroshima, JapanIndustrial Crops Research Center-Mwea, Kenya Agricultural and Livestock Research Organization, Kerugoya, KenyaIndustrial Crops Research Center-Mwea, Kenya Agricultural and Livestock Research Organization, Kerugoya, KenyaInternational Center for Research and Education in Agriculture, Nagoya University, Nagoya, JapanGraduate School of Bioagricultural Sciences, Nagoya University, Nagoya, JapanIndustrial Crops Research Center-Mwea, Kenya Agricultural and Livestock Research Organization, Kerugoya, KenyaIndustrial Crops Research Center-Mwea, Kenya Agricultural and Livestock Research Organization, Kerugoya, KenyaGraduate School of Bioagricultural Sciences, Nagoya University, Nagoya, JapanBioscience and Biotechnology Center, Nagoya University, Nagoya, JapanBioscience and Biotechnology Center, Nagoya University, Nagoya, JapanNovel Gene Resources Laboratory, Plant Breeding Division, International Rice Research Institute, Los Baños, PhilippinesInternational Center for Research and Education in Agriculture, Nagoya University, Nagoya, JapanABSTRACTIn Kenya and many other African countries, improving rice productivity is vital for future food security. To improve rice productivity in Kenya, near-isogenic lines (NIL) were developed by introducing Gn1a and WFP, genes that function to increase grain number per panicle by increasing secondary and primary rachis-branches, into NERICA 1, a registered variety in Kenya. The aim of this study was to determine whether the introduction of these genes has the potential to improve rice productivity under tropical highland conditions in central Kenya. Field experiments were conducted in 2016 and 2017 at a lowland rice field in Mwea, Kenya, under different nitrogen fertilization conditions using three lines of NERICA 1 introgressed with Gn1a and/or WFP (NIL-Gn1a, NIL-WFP, and NIL-Gn1a+WFP) and their recurrent parents, NERICA 1. Two years of field experiments revealed that the introgression lines enhanced grain yield by increasing the number of primary and secondary rachis-branches and the number of grains per panicle. Gn1a and WFP showed additive effects and the introgression of both genes alleviated the negative effects on yield components observed in the introgressed lines, resulting in higher grain yield. Sufficient nitrogen fertilization was required to increase yield in the single-gene introgression lines. However, the line with both Gn1a and WFP achieved reasonable yields even under low fertilizer conditions in Mwea, Kenya. As these introgression lines have similar growing characteristics to their parent variety, they are expected to contribute to increased rice production in Kenya and similar environments in sub-Saharan Africa.https://www.tandfonline.com/doi/10.1080/1343943X.2023.2245127New Rice for Africa (NERICA)tropical highlandsub-Saharan Africanear-isogenic linegrain numbergrain yield |
| spellingShingle | Mayumi Kikuta Daniel Makori Menge Emily Waringa Gichuhi Hiroaki Samejima Rena Tomita John Munji Kimani Ruth Nzisa Musila Kazuyuki Doi Motoyuki Ashikari Rosalyn Angeles-Shim Kshirod Kumar Jena Daigo Makihara Contribution of genes related to grain number (Gn1a and WFP) introgressed into NERICA 1 to grain yield under tropical highland conditions in central Kenya Plant Production Science New Rice for Africa (NERICA) tropical highland sub-Saharan Africa near-isogenic line grain number grain yield |
| title | Contribution of genes related to grain number (Gn1a and WFP) introgressed into NERICA 1 to grain yield under tropical highland conditions in central Kenya |
| title_full | Contribution of genes related to grain number (Gn1a and WFP) introgressed into NERICA 1 to grain yield under tropical highland conditions in central Kenya |
| title_fullStr | Contribution of genes related to grain number (Gn1a and WFP) introgressed into NERICA 1 to grain yield under tropical highland conditions in central Kenya |
| title_full_unstemmed | Contribution of genes related to grain number (Gn1a and WFP) introgressed into NERICA 1 to grain yield under tropical highland conditions in central Kenya |
| title_short | Contribution of genes related to grain number (Gn1a and WFP) introgressed into NERICA 1 to grain yield under tropical highland conditions in central Kenya |
| title_sort | contribution of genes related to grain number gn1a and wfp introgressed into nerica 1 to grain yield under tropical highland conditions in central kenya |
| topic | New Rice for Africa (NERICA) tropical highland sub-Saharan Africa near-isogenic line grain number grain yield |
| url | https://www.tandfonline.com/doi/10.1080/1343943X.2023.2245127 |
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