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Titolo:
CONSEQUENCES OF BREEDING ON BIOMASS, RADIATION INTERCEPTION AND RADIATION-USE EFFICIENCY IN WHEAT
Autore:
CALDERINI DF; DRECCER MF; SLAFER GA;
Indirizzi:
UNIV BUENOS AIRES,FAC AGRON,DEPT PROD VEGETAL,CATEDRA CEREALICULTURA,AV SAN MARTIN 4453 RA-1417 BUENOS AIRES DF ARGENTINA
Titolo Testata:
Field crops research
fascicolo: 3, volume: 52, anno: 1997,
pagine: 271 - 281
SICI:
0378-4290(1997)52:3<271:COBOBR>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
PHOTOSYNTHETICALLY ACTIVE RADIATION; MEDITERRANEAN-TYPE ENVIRONMENT; GENETIC-IMPROVEMENT; TRITICUM-AESTIVUM; WINTER-WHEAT; DRY-MATTER; PHYSIOLOGICAL ATTRIBUTES; GRAIN-YIELD; CULTIVARS; OLD;
Keywords:
BIOMASS PRODUCTION; EXTINCTION COEFFICIENT; CROP GROWTH RATE; GENETIC IMPROVEMENT; RADIATION-USE EFFICIENCY; TRITICUM AESTIVUM;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
34
Recensione:
Indirizzi per estratti:
Citazione:
D.F. Calderini et al., "CONSEQUENCES OF BREEDING ON BIOMASS, RADIATION INTERCEPTION AND RADIATION-USE EFFICIENCY IN WHEAT", Field crops research, 52(3), 1997, pp. 271-281

Abstract

Field experiments were conducted during 1991 and 1992 to identify theeffect of wheat breeding on crop biomass production and its physiological determinants, i.e. radiation interception and radiation-use efficiency. To address this objective, biomass accumulation and its physiological attributes of seven cultivars (including a commercial hybrid) released between 1920 and 1990 were compared in fertilised and irrigated plots. Weeds, pests, diseases and lodging were controlled or prevented. Crop radiation interception was calculated from measurements of incident and transmitted radiation at different times after sowing. Above-ground dry matter was determined at particular stages of developmentof the cultivars. Radiation-use efficiencies and crop growth rates were calculated for each cultivar for pre-anthesis (in both years) and post-anthesis (in 1992) periods. Biomass at anthesis tended to be less in most recently released cultivars than in older materials. Accumulated intercepted radiation at similar developmental stages also differedbetween cultivars. These differences, as well as the trend of biomassat anthesis, were caused by differences in the length of developmental phases between cultivars rather than by changes in the architecture of the canopies. The most recently released cultivars had shorter seedling emergence-anthesis periods than older cultivars. Moreover, all cultivars had similar canopy Light extinction coefficients (k), pre-anthesis radiation-use efficiencies, and crop growth rates. After anthesis, the two oldest cultivars accumulated the least biomass and their radiation-use efficiencies and crop growth rates were smaller than those of modem cultivars. Remarkably, modern cultivars maintained during post-anthesis almost the same levels of crop growth rates and radiation use efficiencies reached during the pre-anthesis period.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/11/20 alle ore 19:11:07