Document Detail


Estimation of genetic parameters of a DH wheat population grown at different N stress levels characterized by probe genotypes.
MedLine Citation:
PMID:  16432739     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Low market prices and environmental concerns in Europe favor lower input wheat production systems. To efficiently breed for new varieties adapted to low input management while maintaining high yield levels, our objective was to characterize the heritability and its components for yield and nitrogen traits under different nitrogen levels. Two hundred and twenty-two doubled-haploid (DH) lines from the cross between Arche (tolerant) and Récital (sensitive) were tested in France at four locations in 2000, and three in 2001, under high (N+) and low (N-) nitrogen supplies. The response of yield to the environment of four probe genotypes, the parents and two controls, were tested and used as descriptors of these environments. Grain yield (GY), its components, and grain and straw nitrogen, called nitrogen traits, were studied. A factorial regression was performed to assess the sensitivity (slope) of the DH lines to nitrogen stress and their performance to low nitrogen supply. An index based on the nitrogen nutrition index at flowering of the probe genotype Récital was the best descriptor of the environment stress. Heritabilities of yield and nitrogen traits for both nitrogen supplies were always above 0.6. When nitrogen stress increased, heritabilities decreased and genotype x nitrogen interaction variances increased. The decrease in heritability was mainly explained by a decrease in genetic variance. Genetic variation for sensitivity to nitrogen stress and performance under low nitrogen supply were shown in the population. GY decreased from 278 to 760 g/m2 per unit of nitrogen stress index increase and GY under moderate nitrogen stress varied from 340 to 613 g/m2. Those contrasted reactions revealed specific lines to include in breeding programs for improving GY under low nitrogen supply.
Authors:
Anne Laperche; Maryse Brancourt-Hulmel; Emmanuel Heumez; Olivier Gardet; Jacques Le Gouis
Related Documents :
11410559 - Response of the qt interval to mental and physical stress in types lqt1 and lqt2 of the...
3688169 - Use of leisure time by cardiac patients.
11511309 - Stress-induced changes in skin barrier function in healthy women.
8150019 - The prevention of cataract caused by oxidative stress in cultured rat lenses. ii. early...
10877099 - Interalveolar septal changes with pasteurella haemolytica-induced pneumonia in exertion...
16917019 - Possible inhibitory role of prolactin-releasing peptide for acth release associated wit...
11542619 - Spaceflight experiments with arabidopsis starch-deficient mutants support a statolith-b...
16799819 - Adaptations to endurance training in the healthy elderly: arm cranking versus leg cycling.
22064719 - Severe physical exertion, oxidative stress, and acute lung injury.
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2006-01-24
Journal Detail:
Title:  TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik     Volume:  112     ISSN:  0040-5752     ISO Abbreviation:  Theor. Appl. Genet.     Publication Date:  2006 Mar 
Date Detail:
Created Date:  2006-03-03     Completed Date:  2006-10-18     Revised Date:  2008-02-15    
Medline Journal Info:
Nlm Unique ID:  0145600     Medline TA:  Theor Appl Genet     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  797-807     Citation Subset:  IM    
Affiliation:
INRA, Unité de Génétique et d'Amélioration des Plantes, Estrées-Mons , BP 50136, 80203 Péronne Cedex, France.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Breeding
Environment*
Genotype
Nitrogen / chemistry,  metabolism*
Regression Analysis
Triticum / anatomy & histology,  genetics*,  physiology
Chemical
Reg. No./Substance:
7727-37-9/Nitrogen

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  A microcolinearity study at the earliness per se gene Eps-A(m)1 region reveals an ancient duplicatio...
Next Document:  Efficacy of opioid analgesia at the superior cervical ganglion in neuropathic head and facial pain