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Titolo:
Molecular mapping of genes conferring aluminum tolerance in rice (Oryza sativa L.)
Autore:
Nguyen, VT; Burow, MD; Nguyen, HT; Le, BT; Le, TD; Paterson, AH;
Indirizzi:
Univ Georgia, Appl Genet Technol Ctr, Dept Crop & Soil Sci, Dept Bot, Athens, GA 30602 USA Univ Georgia Athens GA USA 30602 Soil Sci, Dept Bot, Athens, GA 30602 USA Univ Georgia, Dept Genet, Athens, GA 30602 USA Univ Georgia Athens GA USA30602 eorgia, Dept Genet, Athens, GA 30602 USA Inst Biotechnol, Hanoi, Vietnam Inst Biotechnol Hanoi VietnamInst Biotechnol, Hanoi, Vietnam Texas A&M Univ, Plant Genome Mapping Lab, College Stn, TX 77843 USA Texas A&M Univ College Stn TX USA 77843 ng Lab, College Stn, TX 77843 USA Texas Tech Univ, Plant Mol Genet Lab, Lubbock, TX 79409 USA Texas Tech Univ Lubbock TX USA 79409 Mol Genet Lab, Lubbock, TX 79409 USA Natl Unvi Hanoi, Dept Genet, Hanoi, Vietnam Natl Unvi Hanoi Hanoi Vietnam tl Unvi Hanoi, Dept Genet, Hanoi, Vietnam
Titolo Testata:
THEORETICAL AND APPLIED GENETICS
fascicolo: 6-7, volume: 102, anno: 2001,
pagine: 1002 - 1010
SICI:
0040-5752(200105)102:6-7<1002:MMOGCA>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
TRITICUM-AESTIVUM L; SECALE-CEREALE L.; QUANTITATIVE TRAITS; MENDELIAN FACTORS; WHEAT CULTIVARS; AL-TOXICITY; ROOTS; MAIZE; ACID; POPULATION;
Keywords:
restriction fragment length polymorphism (RFLP); molecular-marker; rice; quantitative trait locus (QTL); abiotic stress tolerance;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
61
Recensione:
Indirizzi per estratti:
Indirizzo: Paterson, AH Univ Georgia, Appl Genet Technol Ctr, Dept Crop & Soil Sci, Dept Bot, Athens, GA 30602 USA Univ Georgia Athens GA USA 30602 t Bot, Athens, GA 30602 USA
Citazione:
V.T. Nguyen et al., "Molecular mapping of genes conferring aluminum tolerance in rice (Oryza sativa L.)", THEOR A GEN, 102(6-7), 2001, pp. 1002-1010

Abstract

Crop productivity on acid soil is restricted by multiple abiotic stress factors. Aluminum (Al) tolerance seems to be a key to productivity on soil with a pH below 5.0, but other factors such as Mn toxicity and the deficiencyof P, Ca and Mg also play a role. The development of Al-tolerant genotypesof rice is an urgent necessity for improving crop productivity in developing countries. Inhibition of root growth is a primary and early symptom of Al toxicity. The present study was conducted to identify genetic factors controlling the aluminum tolerance of rice. Several parameters related to Al tolerance, most importantly the relative root growth under Al stress versus non-stress conditions, were scored in 188 F-3 selfed families from a cross between an Al-tolerant Vietnamese local variety, Chiembau, and an AI-susceptible improved variety, Omon269-65. The two varieties are both Oryza sativassp. indica, but showed a relatively high level of DNA polymorphism, permitting the assembly of an RFLP map consisting of 164 loci spanning 1.715.8 cM, and covering most of the rice genome. A total of nine different genomic regions on eight chromosomes have been implicated in the genetic control, of root and shoot growth under aluminum stress. By far the greatest effects on aluminum tolerance were associated with the region near WG110 on chromosome 1. This region does not seem to correspond to most of the genes that have been mapped for aluminum tolerance in other species, nor do they correspond closely to one another. Most results, both from physiological studies and from molecular mapping studies, tend to suggest that. aluminum toleranceis a complex muIti-genic trait. The identification of DNA markers (such asWG110) that are diagnostic for aluminum tolerance in particular gene poolsprovides an important starting point for transferring and pyramiding genesthat may contribute to the sustainable improvement of crop productivity inaluminum-rich soils. The isolation of genes responsible for aluminum tolerance is likely to be necessary to gain a comprehensive understanding of this complex trait.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/06/20 alle ore 02:31:39