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Titolo:
Comparison of a set of allelic QTL-NILs for chromosome 4 of tomato: Deductions about natural variation and implications for germplasm utilization
Autore:
Monforte, AJ; Friedman, E; Zamir, D; Tanksley, SD;
Indirizzi:
Cornell Univ, Dept Plant Breeding, Ithaca, NY 14853 USA Cornell Univ Ithaca NY USA 14853 ept Plant Breeding, Ithaca, NY 14853 USA Cornell Univ, Dept Plant Biol, Ithaca, NY 14853 USA Cornell Univ Ithaca NY USA 14853 v, Dept Plant Biol, Ithaca, NY 14853 USA Hebrew Univ Jerusalem, Fac Agr, Dept Agr Vegetables & Genet, IL-76100 Rehovot, Israel Hebrew Univ Jerusalem Rehovot Israel IL-76100 , IL-76100 Rehovot, Israel
Titolo Testata:
THEORETICAL AND APPLIED GENETICS
fascicolo: 4, volume: 102, anno: 2001,
pagine: 572 - 590
SICI:
0040-5752(200103)102:4<572:COASOA>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
QUANTITATIVE TRAIT LOCI; ADVANCED BACKCROSS; LYCOPERSICON-ESCULENTUM; CULTIVATED TOMATO; CAROTENOID BIOSYNTHESIS; MENDELIAN FACTORS; LINE POPULATION; MAIZE; IDENTIFICATION; LINKAGE;
Keywords:
QTL; fine-mapping; epistasis; pleiotropy; breeding;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
47
Recensione:
Indirizzi per estratti:
Indirizzo: Tanksley, SD Cornell Univ, Dept Plant Breeding, 252 Emerson Hall, Ithaca, NY 14853 USA Cornell Univ 252 Emerson Hall Ithaca NY USA 14853 Y 14853 USA
Citazione:
A.J. Monforte et al., "Comparison of a set of allelic QTL-NILs for chromosome 4 of tomato: Deductions about natural variation and implications for germplasm utilization", THEOR A GEN, 102(4), 2001, pp. 572-590

Abstract

Quantitative Trait Locus (QTL) allelic variation was studied by analyzing near-isogenic lines (NILs) carrying homologous introgressions on chromosome4 from three green-fruited wild tomato species. The NILs affect agronomic (yield, brix, fruit weight) and fruit (fruit shape, color, epidermal reticulation) traits in a similar manner. However, significant differences were detected in the magnitudes of the effects, the dominance deviations and epistatic interactions, indicating that those species carry different alleles for the QTL. As the QTL did not show any interaction across environments, genetic backgrounds or other QTLs, it can be used to introduce novel genetic variation into a broad range of cultivars. Analysis of new recombinant NILsshowed that fruit traits are controlled by several linked genetic loci, whereas multiple genetic loci control the agronomic traits within the original introgression. The hypothesis that QTLs may be composed of multiple linked genes can not be rejected prior to implement projects for QTL isolation and cloning. Loci involved in color enhancement could not be related to any known gene involved in the carotenoid biosynthesis pathway, therefore it ishypothesized that the function of those loci must be related to the genetic regulation of the carotenoid biosynthetic pathway.

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Documento generato il 09/04/20 alle ore 00:14:48