Flowering prediction for flood-irrigated rice in the Midwest and North regions of Brazil

Justino, Ludmilla Ferreira; Honorio Filho, Gutemberg Resende; Matta, David Henriques da; Stone, Luís Fernando; Heinemann, Alexandre Bryan

doi:10.1590/0034-737X2024710007

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Physiology and morphology applied to agriculture • Rev. Ceres 71 • 2024 • https://doi.org/10.1590/0034-737X2024710007 copy

Flowering prediction for flood-irrigated rice in the Midwest and North regions of Brazil¹ 1 This article was extract from the second author’ Master Dissertation.

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

This study aimed to analyze the influence of climatic and geographic variables on the flowering process of flood-irrigated rice in the Midwest and North regions of Brazil. Agronomic data from the breeding program were related to the following variables: air temperature, relative humidity, global solar radiation, rainfall, degree days, latitude, longitude, and altitude. The analysis was performed using Multiple Linear Regression (MLR) and Generalized Additive (GAM) models. Cross-validation determined the most suitable model. The GAM model showed the best performance for both regions. In the Midwest and North of Brazil, flowering was strongly influenced by climate variables related to temperature. The rise in minimum temperatures tends to advance flowering. Higher minimum accumulated temperatures tend to delay flowering.

Keywords
phenology; predictive model; climate; Oryza sativa L.

Region	Genotypes
Midwest	BRS A704, BRS Alvorada, BRS Biguá, BRS Catiana, BRS Formoso, BRS Guará, BRS Jaburu, BRSMG Rubelita, BRS Pampeira, BRS Tropical, Cica 8, Epagri 108, Epagri 109, IRGA 430, IRGA 97-05, IRGA 97-10, Javaé, Marajó, Metica 1, Ourominas, PR380, Puitá Inta CL, Roraima, SCS 112, SCS 121 CL, SC138, SC173, SCS 114 Andosan, SCSBRS 113 Tio Taka, SCS 116 Satoru, SCSBRS Piracema.
North	BRS A701 CL, BRS A702 CL, BRS A704, BRS Alvorada, BRS Catiana, BRS Formoso, BRS Guará, BRS Jaburu, BRS Pampa, BRS Pampeira, BRS Sinuelo CL, Cica 8, H6, IAPAR 58, IRGA 417, IRGA 422 CL, IRGA 424, IRGA 426, IRGA 427, IRGA 430, Javaé, Marajó, Metica 1, Ourominas, PR380, PR498, Puitá Inta CL, SC138, SCSBRS 113 Tio Taka, SG11551.

Universidade Federal de Viçosa Av. Peter Henry Rolfs, s/n, 36570-000 Viçosa, Minas Gerais Brasil, Tel./Fax: (55 31) 3612-2078 - Viçosa - MG - Brazil
E-mail: ceres@ufv.br

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[1] * luis.stone@embrapa.br; alexandre.heinemann@embrapa.br

Brazil

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Flowering prediction for flood-irrigated rice in the Midwest and North regions of Brazil1 1 This article was extract from the second author’ Master Dissertation.

ABSTRACT

Flowering prediction for flood-irrigated rice in the Midwest and North regions of Brazil¹ 1 This article was extract from the second author’ Master Dissertation.