Seed germination and dormancy of red rice ecotypes

被引：7

作者：

Schwanke, A. M. L. ^{[1
]}

Andres, A. ^{[2
]}

Noldin, J. A. ^{[3
]}

Concenco, G. ^{[4
]}

Procopio, S. O. ^{[5
]}

机构：

[1] Fitossanidade FAEM UFPel, Porto Alegre, RS, Brazil

[2] Area Herbol Embrapa Clima Temperado, Pelotas, RS, Brazil

[3] Area Plantas Daninhas, Itajai, SC, Brazil

[4] Univ Fed Vicosa, Vicosa, MG, Brazil

[5] Embrapa Tabuleiros Costeiros, BR-49025040 Aracaju, SE, Brazil

来源：

PLANTA DANINHA | 2008年 / 26卷 / 03期

关键词：

irrigated rice; weedy rice; and seed viability;

D O I：

10.1590/S0100-83582008000300004

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

The objective of this work was to evaluate aspects related to the phenotypic characterization of red rice ecotypes collected in the states of Rio Grande do Sul and Santa Catarina. The ecotypes were studied and compared to the commercial rice cultivars BR-IRGA 409, BR-IRGA 4 10, IRGA 417, and El Paso L 144. In the laboratory experiment, seed biometry, 1000 seed-weight and seed germination and dormancy 30, 60, 90, 120, and 150 days after harvesting Were evaluated. The red rice ecotypes from the rice fields evaluated showed wide variability in seed characteristics and dormancy intensity and duration. Some ecotypes showed dormancy period above 150 days after harvesting. The results of this study confirm that red rice populations infesting rice fields are quite diverse, and appropriate control of red rice is only achieved when growers adopt not only isolated control measures, but also several management practices to reduce red rice yield losses.

引用

页码：497 / 505

页数：9

共 19 条

[1]

[Anonymous], ARROZ IRRIGADO BRASI

[2]

Avila L. A. D., 2000, CIENCIA RURAL, V30, P773, DOI [10.1590/S0103-84782000000500005, DOI 10.1590/S0103-84782000000500005]

[3]

Bewley J.D., 1985, SEEDS PHYSL DEV GERM

[4]

*BRAS MIN AGR REF, 1992, REGR AN SEM

[5] DORMANCY IN RED RICE .4. RESPONSE OF UNIMBIBED AND IMBIBING SEEDS TO NITROGEN-DIOXIDE [J].

COHN, MA ;

CASTLE, L .

PHYSIOLOGIA PLANTARUM, 1984, 60 (04) :552-556

[6] SEED DORMANCY IN RED RICE .7. STRUCTURE-ACTIVITY STUDIES OF GERMINATION STIMULANTS [J].

COHN, MA ;

JONES, KL ;

CHILES, LA ;

CHURCH, DF .

PLANT PHYSIOLOGY, 1989, 89 (03) :879-882

[7]

GOSS W. L., 1940, JOUR AMER SOC AGRON, V32, P974

[8]

GOSS W. L., 1939, JOUR AMER SOC AGRON, V31, P633

[9]

*IRRI, 1980, DESCR RIC OR SAT L

[10]

LARINDE MA, 1979, THESIS MISSISSIPPI S

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