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Titolo:
MAIZE PHYSIOLOGICAL TRAITS RELATED TO GRAIN-YIELD AND HARVEST MOISTURE IN MID-SEASON TO SHORT-SEASON ENVIRONMENTS
Autore:
DWYER LM; MA BL; EVENSON L; HAMILTON RI;
Indirizzi:
AGR CANADA,CTR LAND & BIOL RESOURCES RES,RES BRANCH,CENT EXPTL FARM OTTAWA K1A 0C6 ON CANADA AGR CANADA,PLANT RES CTR,RES BRANCH,CENT EXPTL FARM OTTAWA K1A 0C6 ONCANADA
Titolo Testata:
Crop science
fascicolo: 4, volume: 34, anno: 1994,
pagine: 985 - 992
SICI:
0011-183X(1994)34:4<985:MPTRTG>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
CORN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
12
Recensione:
Indirizzi per estratti:
Citazione:
L.M. Dwyer et al., "MAIZE PHYSIOLOGICAL TRAITS RELATED TO GRAIN-YIELD AND HARVEST MOISTURE IN MID-SEASON TO SHORT-SEASON ENVIRONMENTS", Crop science, 34(4), 1994, pp. 985-992

Abstract

Identification of easily measured physiological traits contributing to yield under specified environmental conditions would benefit genotypic selection for maize (Zea mays L.). A field experiment was conductedto determine relationships between grain yield, harvest moisture, theratio yield/moisture (Y/M), and 10 maize physiological traits relatedto development time, vegetative growth, and partitioning to the grain. Nine commercial hybrids, representing three maturity classes from 75to 95 d, were planted at three sites with zonations, based on corn heat units (CHU), corresponding to the three maturity classes within 100km of Ottawa, Canada (45 degrees 22' N, 75 degrees 43' W), in 1988, 1989, and 1990. Grain yield and harvest moisture were related to hybridmaturity; i.e., late maturity hybrids produced high yields with high grain moisture, but traits related to development time alone did not predict yield and moisture. Traits most highly correlated with grain yield and Y/M for the three maturity classes at the three sites were harvest index, vegetative dry matter (at tasselling), time to develop between silking and maturity (TFILL), and time to develop to silking (TSILK). Traits most highly correlated with harvest moisture were time to develop to maturity, TSILK, and TFILL. Models to estimate grain yield had higher coefficients of determination than those for harvest moisture and models for Y/M had intermediate coefficients. Results suggest that selection for high yielding low moisture hybrids in mid- to short-season production areas should aim to increase (i) the grainfilling period (TFILL); (ii) vegetative dry matter; and (iii) harvest index.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/09/20 alle ore 15:43:14