Comparing rice germplasm groups for growth, grain yield and weed-suppressive ability under aerobic soil conditions

Vista sencilla de ítem
dc.creatorZhao, D.L.
dc.creatorAtlin, G.N.
dc.creatorBastiaans, L.
dc.creatorSpiertz, J. H. J.
dc.date2006-12
dc.date2024-12-19T12:56:22Z
dc.date2024-12-19T12:56:22Z
dc.date.accessioned2026-06-27T04:11:37Z
dc.descriptionGermplasm and cultivars need to be selected as parents for breeding weed‐competitive aerobic rice in the tropics. Forty rice (Oryza sativa) cultivars belonging to the aus, indica and tropical japonica germplasm groups, or derived from crosses among them, were evaluated in adjacent weed‐free and weedy trials in aerobic soil conditions during the wet seasons of 2001–2003. The objectives of this study were to assess vegetative growth, grain yield under weed‐free (YF) and weedy (YW) conditions, and weed‐suppressive ability (WSA) of different germplasm groups. In the first 4 weeks after sowing, indica cultivars had faster growth in height, tillering and crop biomass than other groups. They also had high YF, YW and strong WSA. Aus cultivars were similar to the indica types in early growth and WSA, but were poor in YF. Tropical japonica groups and the group derived from indica/tropical japonica crosses were generally inferior to aus and indica groups in early growth and WSA. Both of their YF and YW were lower than that of the indica group. Therefore, indica germplasm seemed to be most suitable for breeding high‐yielding and weed‐suppressive aerobic rice for the tropics. The relationship of WSA with various traits within tropical japonica germplasm revealed that fast early growth, rather than plant erectness, is crucial to WSA.
dc.identifierhttps://hdl.handle.net/10568/166530
dc.identifier.urihttp://hdl.handle.net/123456789/24625
dc.languageen
dc.publisherWiley
dc.sourceZHAO, D L; ATLIN, G N; BASTIAANS, L and SPIERTZ, J H J. 2006. Comparing rice germplasm groups for growth, grain yield and weed-suppressive ability under aerobic soil conditions. Weed Research, Volume 46 no. 6 p. 444-452
dc.subjectaerobic conditions
dc.subjectcompetitive ability
dc.subjectcrop yield
dc.subjectgermplasm
dc.subjectgrowth
dc.subjectplant height
dc.subjecttillering
dc.subjectweeds
dc.subjectweed control
dc.subjectphilippines
dc.titleComparing rice germplasm groups for growth, grain yield and weed-suppressive ability under aerobic soil conditions
dc.typeJournal Article

Archivos

Colecciones

Instituto Internacional de Investigación del Arroz (IRRI)