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To investigate the genetic factors underlying constitutive and adaptive morphological traits of roots under different water-supply conditions, a recombinant inbred line (RIL) population derived from a cross between the lowland rice variety IR1552 and the upland rice variety Azucena with 249 molecular markers, was used in cylindrical-pot experiments. Eighteen QTLs were detected for seminal root length (SRL), adventitious root number (ARN), and lateral root length (LRL) and lateral root number (LRN) on the seminal root at a soil depth of from 3 to 6 cm under flooding and upland conditions. One identical QTL was detected under both flooding and upland conditions. The relative parameters under the two water-supply conditions were also used for QTL analysis. Five QTLs for upland induced variations in the traits were detected with the positive alleles from Azucena. A comparative analysis was performed for the QTLs detected in this study and those reported from two other populations with Azucena as a parent. Several identical QTLs for root elongation were found across the three populations with positive alleles from Azucena. Candidate genes were screened from ESTs and cDNA-AFLP clones for comparative mapping with the detected QTLs. Two genes for cell expansion, OsEXP2 and endo-1,4-β-D-glucanase EGase, and four cDNA-AFLP clones from root tissues of Azucena, were mapped on the intervals carrying the QTLs for SRL and LRL under upland conditions, respectively.

Titel:	Mapping QTLs and candidate genes for rice root traits under different water-supply conditions and comparative analysis across three populations
Autor/in / Beteiligte Person:	ZHENG, B. S ; YANG, L ; ZHANG, W. P ; MAO, C. Z ; WU, Y. R ; YI, K. K ; LIU, F. Y ; WU, P
Link:	Full Text Finder (Volltext) E-Journal im Bestand der UB Hagen? View record from PASCAL Archive
Zeitschrift:	Theoretical and Applied Genetics, Jg. 107 (2003), Heft 8, S. 1505-1515
Veröffentlichung:	Berlin; Heidelberg: Springer, 2003
Medientyp:	academicJournal
Umfang:	print, 38 ref
ISSN:	0040-5752 (print)
Schlagwort:	Asie Asia Chine China Agronomy, agriculture, phytopathology Agronomie, agriculture, phytopathologie Genetics Génétique Sciences biologiques et medicales Biological and medical sciences Sciences biologiques fondamentales et appliquees. Psychologie Fundamental and applied biological sciences. Psychology Genetique des eucaryotes. Evolution biologique et moleculaire Genetics of eukaryotes. Biological and molecular evolution Génétique classique, génétique quantitative, hybrides Classical genetics, quantitative genetics, hybrids Végétaux Vegetals Pteridophyta, spermatophyta Agronomie. Sciences du sol et productions vegetales Agronomy. Soil science and plant productions Génétique et amélioration des plantes d'intérêt économique Genetics and breeding of economic plants Sélection variétale. Amélioration spéciale, objectifs d'amélioration Varietal selection. Specialized plant breeding, plant breeding aims Adaptation au milieu et aux conditions de culture Adaptation to environment and cultivation conditions Angiospermae Culture pluviale Rainfed agriculture Cultivo pluvial Eau Water Agua Gramineae Marqueur génétique Genetic marker Marcador genético Monocotyledones Plante céréalière Cereal crop Planta cerealista Spermatophyta Adaptation Adaptación Caractère agronomique Agronomic character Carácter agronómico Caractère quantitatif Quantitative character Carácter cuantitativo Carte génétique Genetic mapping Mapa genético Comparaison intraspécifique Intraspecific comparison Comparación intraespecífica Engorgement sol Waterlogging (soil) Anegamiento suelo Locus quantitatif Quantitative trait loci Locus cuantitativo Marqueur AFLP Amplified fragment length polymorphism marker Marcador AFLP Morphologie Morphology Morfología Oryza sativa Racine Root Raíz Sélection génétique Genetic selection Selección genética Séquence répétée Repeated sequence Secuencia repetida Eau utile Available water Riziculture pluviale Upland rice growing Cultivo arroz de secano Candidate genes Flooding conditions QTLs Rice (Oryza sativa L.) Root morphology Upland conditions Subject Geographic: Asie Asia Chine China
Sonstiges:	Nachgewiesen in: PASCAL Archive Sprachen: English Original Material: INIST-CNRS Document Type: Article File Description: text Language: English Author Affiliations: The State Key laboratory of Plant Physiology and Biochemistry, College of Life Science, Zhejiang University, 310029 Hanezhou, China ; College of Life Science, Zhejiang Forestry University, 311300 Lin An, China Rights: Copyright 2004 INIST-CNRS ; CC BY 4.0 ; Sauf mention contraire ci-dessus, le contenu de cette notice bibliographique peut être utilisé dans le cadre d’une licence CC BY 4.0 Inist-CNRS / Unless otherwise stated above, the content of this bibliographic record may be used under a CC BY 4.0 licence by Inist-CNRS / A menos que se haya señalado antes, el contenido de este registro bibliográfico puede ser utilizado al amparo de una licencia CC BY 4.0 Inist-CNRS Notes: Agronomy. Soil sciences and vegetal productions ; Eukaryotes genetics. Biological and molecular evolution

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Mapping QTLs and candidate genes for rice root traits under different water-supply conditions and comparative analysis across three populations