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Titolo:
Has yield stability changed with genetic improvement of wheat yield?
Autore:
Calderini, DF; Slafer, GA;
Indirizzi:
UnivArgentinaires, Fac Agron, Dept Prod Vegetal, RA-1417 Buenos Aires, DF,Univ Buenos Aires Buenos Aires DF Argentina RA-1417 417 Buenos Aires, DF,
Titolo Testata:
EUPHYTICA
fascicolo: 1, volume: 107, anno: 1999,
pagine: 51 - 59
SICI:
0014-2336(1999)107:1<51:HYSCWG>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
MEDITERRANEAN-TYPE ENVIRONMENT; WINTER-WHEAT; SPRING WHEAT; PHYSIOLOGICAL ATTRIBUTES; TRITICUM-AESTIVUM; GRAIN-YIELD; DRY-MATTER; RADIATION INTERCEPTION; NORTHWEST MEXICO; CULTIVARS;
Keywords:
wheat; plant breeding; yield stability; environmental index;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
42
Recensione:
Indirizzi per estratti:
Indirizzo: Calderini, DF Univ7Buenos Aires, Fac Agron, Dept Prod Vegetal, Av San Martin 4453, RA-141 Univ Buenos Aires Av San Martin 4453 Buenos Aires DF Argentina RA-1417
Citazione:
D.F. Calderini e G.A. Slafer, "Has yield stability changed with genetic improvement of wheat yield?", EUPHYTICA, 107(1), 1999, pp. 51-59

Abstract

The effect of plant breeding on yield and their physiological determinantshas been widely studied in wheat. However, it is poorly understood how, and to what extent, yield stability has been modified. To attempt a direct analysis of changes in absolute and relative yield stability, data of yield of cultivars released in different eras in different environments were obtained from records from our lab and from the literature. Depending on the availability of data, effects of plant breeding on yield stability of cultivars released in Argentina, Australia, Italy and the United Kingdom were evaluated using a quantitative approach. In this paper it was assumed that the slope of yield vs, environmental index estimates the instability of the cultivars. In addition, a more qualitative approach for Mexico, and the former USSR complemented this analysis. There was a clear decrease in yield stability assessed in absolute terms as a consequence of wheat breeding. In Argentina, Australia, Italy and the UK this decrease was related to the magnitude of yield increases. However, the decrease in yield stability in Argentina and Australia was less than forItaly and the UK, particularly so during the last 30 years. Modern cultivars released in Argentina and Australia showed a trend to maintain yield stability as a percentage of their yield similar to that of their predecessors, while the two European countries analysed tended to a slight decrease in yield stability even in relative terms. The complementary, less quantitative evaluation of Mexico and the former USSR appeared to confirm the quantitative trends described for the other countries, i.e. a general decrease in yield stability (assessed in absolute terms) with genetic gains in yield potential.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/11/20 alle ore 17:56:09