D Malathi, P Gomathinayagam, C R Ananda Kumar, and S Gurumurthy
Posters: Agrotechnol
The investigation was carried out under aerobic condition using the line x testers mating design and studied for yield and its components traits. The objective of this study was carried out to identify the best combining parents and their hybrids suitable for aerobic cultivation. All the thirty hybrids, along with parents of five lines and six testers were sown in non-puddled and non flooded aerobic soil in randomized block design with three replications. Among the hybrids, ADT 47 x Nootripathu recorded significant standard heterosis for ten traits days to 50 per cent flowering, plant height, panicle length, number of grains per panicle, spikelet fertility, root length, root dry weight, root:shoot ratio, chlorophyll stability index, and grain yield per plant; the hybrid ASD 16 x N 22 which showed significant standard heterosis for nine traits productive tillers per plant, panicle length, number of grains per panicle, spikelet fertility, 100 grain weight, root : shoot ratio, chlorophyll stability index, relative water content and grain yield per plant and the hybrid ADT 36 x Nootripathu registered significant standard heterosis for nine traits days to 50 per cent flowering, panicle length, number of grains per panicle, spikelet fertility, root length, root dry weight, chlorophyll stability index, relative water content and grain yield per plant. Out of thirty hybrids, three hybrids viz., ADT 47 x Nootripathu, ASD 16 x N 22 and ADT 36 x Nootripathu advocated for commercial exploitation since grain yield with its contributing characters manifested significantly for standard heterosis under aerobic condition. Therefore these hybrids as well as parents could serve as basic materials for developing high yielding hybrids suitable for water limited conditions.