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Cited by 372Genetic Mapping and Diversity in Plants and AnimalsRice Cultivation and Yield ImprovementPlant Disease Resistance and Genetics

The DOI matches its Crossref record; 23 of the 24 references it cites were found in a registry or an index.

Marker-assisted selection to introgress rice QTLs controlling root traits into an Indian upland rice variety

Steele, K. A., Price, A. H., Shashidhar, H. E., Witcombe, J. R.·2006·Theoretical and Applied Genetics
DOI 10.1007/s00122-005-0110-4
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Abstract

A marker-assisted back-crossing (MABC) breeding programme was conducted to improve the root morphological traits, and thereby drought tolerance, of the Indian upland rice variety, Kalinga III. This variety, the recurrent parent in the MABC, had not previously been used for quantitative trait locus (QTL) mapping. The donor parent was Azucena, an upland japonica variety from Philippines. Five segments on different chromosomes were targeted for introgression; four segments carried QTLs for improved root morphological traits (root length and thickness) and the fifth carried a recessive QTL for aroma. Some selection was made at non-target regions for recurrent parent alleles. We describe the selection made in three backcross (BC) generations and two further crosses between BC3 lines to pyramid (stack) all five target segments. Pyramids with four root QTLs were obtained in eight generations, completed in 6 years using 3,000 marker assays in a total of 323 lines. Twenty-two near-isogenic lines (NILs) were evaluated for root traits in five field experiments in Bangalore, India. The target segment on chromosome 9 (RM242-RM201) significantly increased root length under both irrigated and drought stress treatments, confirming that this root length QTL from Azucena functions in a novel genetic background. No significant effects on root length were found at the other four targets. Azucena alleles at the locus RM248 (below the target root QTL on chromosome 7) delayed flowering. Selection for the recurrent parent allele at this locus produced early-flowering NILs that were suited for upland environments in eastern India.

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  1. Zhang J, Chandra Babu R, Pantuwan G, Kamoshita A, Blum A, Wade L, Sarkarung S, O’Toole JC, Nguyen HT (1999) Molecular dissection of drought tolerance in rice: from physiomorphological traits to field performance. In: Ito O, O’Toole J, Hardy B (eds) Genetic improvement of rice for water-limited environments. Proceedings of the workshop on genetic improvement of rice for water-limited environments, 1–3 December 1998, Los Banos,. Los Banos Philippines:International Rice Research Institute, pp 307–317

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Metadata

Authors
Steele, K. A., Price, A. H., Shashidhar, H. E., & Witcombe, J. R.
Affiliations
  • Bangor University (GB)
  • University of Aberdeen (GB)
  • University of Agricultural Sciences, Bangalore (IN)
Corresponding author
Steele, K. A.
ORCID
Venue
Theoretical and Applied Genetics
Publisher
Springer Science and Business Media LLC
Published
2005-10-06
Volume
112
Issue
2
Pages
208-221
ISSN
  • 0040-5752 (ISSN-L)
  • 1432-2242
DOI
10.1007/s00122-005-0110-4
OpenAlex
W2137677313
Cited by
370
References
24
Citations by year
2026: 6 · 2025: 5 · 2024: 9 · 2023: 10 · 2022: 15 · 2021: 14 · 2020: 36 · 2019: 10 · 2018: 21 · 2017: 17 · 2016: 20 · 2015: 25 · 2014: 20 · 2013: 30 · 2012: 23
FWCI
8.45
Type
journal article
Language
en
Open access
closed
Licence
www.springer.com/tdm (tdm)
Locations
  • Theoretical and Applied Genetics (publishedVersion)
  • PubMed (publishedVersion)
Funders
Department for International Development
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Mapping and Diversity in Plants and Animals
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Rice Cultivation and Yield Improvement
  • Life Sciences › Agricultural and Biological Sciences › Plant Science › Plant Disease Resistance and Genetics
Keywords
marker-assisted backcrossing, rice, upland rice, quantitative trait loci, root traits, drought tolerance, introgression, near-isogenic lines, root length, root thickness, flowering time, Azucena, chromosome 9
MeSH terms
Crosses, Genetic, Genetic Markers, Genotype, India, Phenotype, Oryza, Selection, Genetic, Plant Roots, Chromosomes, Plant, Quantitative Trait Loci

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