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Revista Brasileira de Sementes

versão impressa ISSN 0101-3122

Resumo

MELO, Paulo Trajano Burck Santos; SCHUCH, Luis Osmar Braga; ASSIS, Francisco Neto de  e  CONCENCO, Germani. Individual behavior of rice plants from different physiological quality seeds in rice populations. Rev. bras. sementes [online]. 2006, vol.28, n.2, pp.84-94. ISSN 0101-3122.  http://dx.doi.org/10.1590/S0101-31222006000200011.

With the objective of to evaluate the individual behaviour of rice plants from high and low physiological quality seeds in populations of rice (Oryza sativa L.) under different combinations along the sowing line, this study was conducted. The treatments were composed of different mixes of rice, cv. BR-IRGA 410, seeds of low and high vigor, sowed under controlled environment and transplanted to the field, in order to maintain homogeneous stand and arrangement of seedlings. Height, dry mass and branches number were evaluated at 60, 102 and 134 days after transplanting and grain yield, harvest index and number of panicles per plant were evaluated at the end of the cycle. Plants originated from high physiological quality seeds were superior in all parameters evaluated, with no significance of plant position along the line. Plants from high vigor seeds showed grain yield increasing when compared to plants from low vigor seeds, and did not show a dominating behaviour over the plants originated from low vigor seeds.

Palavras-chave : Oryza sativa; vigor; grain yield.

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