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Estimation of soybean genetic progress in the South of Brazil using multi-environmental yield trials Scientia Agricola
Lange,Cláudia Erna; Federizzi,Luiz Carlos.
The success of a genetic breeding program in a certain period can be assessed by the genetic gain observed. Genetic progress can be estimated from the multi environmental trials (MET) data which are routinely carried out by annual species breeding programs for the assessment of new commercial cultivars. A data set of 20 years of MET of advanced soybean lines derived from four breeding programs was used to estimate and to compare the genetic gains obtained for three soybean maturity groups (early, medium and late) in four cropping regions of the State of Rio Grande do Sul. The estimated yield gains ranged from 0.0 to 71.5 kg ha-1 year-1 (3.49% per year), depending on the maturity group and region, which suggests that the genetic breeding effort does not...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Glycine max (L.) Merrill; Genetic gain; Maturity groups; Advanced lines.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000300005
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Long-term changes in rice development in Southern Brazil, during the last ten decades. Repositório Alice
STRECK, N. A.; UHLMANN, L. O.; GABRIEL, L. F..
The objective of this work was to test long‑term trends in the duration of rice development phases in Santa Maria, RS, Brazil. The duration from emergence to V3 (EM‑V3), emergence to panicle differentiation (EM‑R1), emergence to anthesis (EM‑R4), and emergence to all grains with brown hull (EM‑R9) was calculated using leaf appearance and developmental models for four rice cultivars (IRGA 421, IRGA 417, EPAGRI 109, and EEA 406), for the period from 1912 to 2011, considering three emergence dates (early, mid, and late). The trend of the time series was tested with the non‑parametric Mann‑Kendall test, and the magnitude of the trend was estimated with simple linear regression. Rice...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Região sul; Taxa de crescimento; Arroz; Fenologia; Oryza sativa; Global warming; Growing season; Maturity groups; Phenology.
Ano: 2012 URL: http://www.alice.cnptia.embrapa.br/handle/doc/930290
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