Improving salt tolerance of lowland rice cultivar ‘Rassi’ through marker-aided backcross breeding in West Africa

Bimpong, Isaac Kofi; Manneh, Baboucarr; Sock, Mamadou; Diaw, Faty; Amoah, Nana Kofi Abaka; Ismail, Abdelbagi M.; Gregorio, Glenn B.; Singh, Rakesh Kumar; Wopereis, M.C.S.

doi:10.1016/j.plantsci.2015.09.020

Cited by 64 publications

(38 citation statements)

References 31 publications

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“…Various kinds of genes and QTLs have been shown to contribute to resisting salt stress under experimental conditions. However, few of them work in practice to improve the salt tolerance of rice in the field, and there remains a need to explore QTLs and genes that might make a greater contribution under saline conditions [28,29].…”

Section: Discussionmentioning

confidence: 99%

Identification and Validation a Major QTL from “Sea Rice 86” Seedlings Conferred Salt Tolerance

Yang

et al. 2020

Agronomy

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Saline stress severely affects rice (Oryza sativa L.) growth and development and reduces crop yield. Therefore, developing salt-tolerant and high-yielding rice using quantitative trait loci (QTLs) and linkage markers is a priority for molecular breeding. Here, the indica rice Sea Rice 86 (SR86) seedlings showed higher tolerance than ordinary rice varieties in saline soil, and a dominant effect on salinity sensitivity was demonstrated by genetic analysis. We constructed bulked segregant analysis pools using F 2 populations from parents Dianjingyou 1 as the recipient and SR86 as the donor. We identified a 2.78 Mb region on chromosome 1 as the candidate region. Using simple sequence repeat markers and substitution analysis, we mapped the target region within 5.49 cM in the vicinity of markers RM8904-RM493. We speculated that this QTL, named qST1.1, might contribute significantly to the salt tolerance of SR86. The high salt tolerance of introgression lines obtained by marker assistant selection (MAS) confirmed that the qST1.1 region was associated with salinity tolerance. This newly-discovered QTL will be helpful for the analysis of the salt-tolerant mechanism of rice and breeding high-quality rice varieties using MAS.

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Section: Discussionmentioning

confidence: 99%

Identification and Validation a Major QTL from “Sea Rice 86” Seedlings Conferred Salt Tolerance

Yang

et al. 2020

Agronomy

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“…Rice is more salt‐sensitive during seedling and early reproductive stages, with concentrations as low as 30 mM NaCl (~3 dS/m) being able to significantly inhibit seedling growth and affect yield components (Akbar, Yabuno, & Nakao, ; Lutts, Kinet, & Bouharmont, ; Zeng & Shannon, ). Improving salt tolerance has become an urgent need in rice breeding programmes, especially in saline and coastal areas (Bimpong et al, ; Flowers, ).…”

Section: Introductionmentioning

confidence: 99%

“…Improving salt tolerance has become an urgent need in rice breeding programmes, especially in saline and coastal areas (Bimpong et al, 2016;Flowers, 2004).…”

Section: Introductionmentioning

confidence: 99%

Identification of new QTL for salt tolerance from rice variety Pokkali

Chen

Yingguo

Chen

et al. 2020

J Agronomy Crop Science

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Salt stress is an ever‐present threat to rice production worldwide. Rice salinity tolerance is complex, both genetically and physiologically. The success and effectiveness in selecting salt‐tolerant rice variety require the identification of QTL for the tolerance and closely linked molecular markers. In the present study, a RIL population consisting of 148 lines, derived from a cross between IR29 (salt‐sensitive) and Pokkali (salt‐tolerant), was used to identify new QTL for salt tolerance and investigate the relationships between salt stress caused injury and the changes in different physiological and morphological traits at the seedling stage. 14,470 high‐quality SNP markers generated by the Rice 56K SNP array were converted to 1,467 bin markers for linkage mapping. A high‐density genetic linkage map covering 1,680.9 cM was constructed, with the physical to genetic distance ratio being 222 Kb/cM. In total, 23 QTL for different salt tolerance indices were identified, including the previously reported Saltol which is currently used in breeding programmes. Three QTL for salt injury score (SIS) were located on chromosomes 1, 4 and 12, all being closely related to the long‐distant Na+ transport from roots to shoots. These QTL showed additive effects, thus can be effectively used in breeding programme to pyramid various tolerance genes.

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“…Therefore, developing drought-and salt-tolerant cultivars is an important strategy to reduce risk and increase rice productivity (Blumwald and Grover 2006). Over the past decade, extensive efforts have been devoted to developing drought-and/or salt-tolerant rice cultivars (Ali et al 2006;Bernier et al 2008;Kumar et al 2008;Swamy et al 2011Swamy et al , 2017Chai et al 2013;Swamy and Kumar 2013;Wang et al 2013;Bimpong et al 2016;Ali et al 2017). These cultivars were mostly developed through conventional cross-pedigree breeding and marker-assisted backcross breeding approaches to enhance the ability of modern rice varieties to tolerate drought and salinity stresses by using diverse rice accessions.…”

Section: Introductionmentioning

confidence: 99%

Recurrent selection breeding by dominant male sterility for multiple abiotic stresses tolerant rice cultivars

et al. 2017

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Recurrent selection has not been extensively applied in rice breeding practices due to lack of male sterility genes. Recently, a male sterile line (named as 'Jiabuyu') controlled by a novel single dominant gene was found, which provides an ideal tool for rice recurrent selection breeding. Here, two different kinds of recurrent selection populations facilitated for outcrossing by the dominant male sterile line 'Jiabuyu' were developed, that included one population using 31 abiotic stress tolerance introgression lines with common recipient parent as founders, and the other one using 25 popular restorers lines applied in hybrid breeding as founders. After two cycles of recurrent selection through natural outcrossing, the seeds from male fertile progeny plants were screened for higher grain yield under normal irrigated, drought, and salt-stressed natural field conditions. Finally, we identified 11 promising high-yielding lines under irrigated conditions, 12 drought-tolerant and 12 salt-tolerant lines. Among them, one line gave higher grain yield across all three conditions, three lines yielded high in both irrigated and drought conditions and another three lines gave high yields in both drought and salt-stressed conditions. The present study was a commendable attempt at utilizing recurrent selection population facilitated by dominant male sterile line to improve rice complex traits, which provided valuable lessons for other rice breeders. The developed lines are promising to be rice varieties with high yield, drought and/or salinity tolerances.Yunlong Pang, Kai Chen, and Xiaoqian Wang have contributed equally to this work.

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Improving salt tolerance of lowland rice cultivar ‘Rassi’ through marker-aided backcross breeding in West Africa

Cited by 64 publications

References 31 publications

Identification and Validation a Major QTL from “Sea Rice 86” Seedlings Conferred Salt Tolerance

Identification and Validation a Major QTL from “Sea Rice 86” Seedlings Conferred Salt Tolerance

Identification of new QTL for salt tolerance from rice variety Pokkali

Recurrent selection breeding by dominant male sterility for multiple abiotic stresses tolerant rice cultivars

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