TY  - PRO
AU  - Ouanklin,T.
AU  - Samphantharak,K.
AU  - Srinivasan,G.|Zaidi,P.H.|Prasanna,B.M.|Gonzalez,F.|Lesnick,K.
ED  - Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico, DF (Mexico)
ED  - Proceedings of the Asian Regional Maize Workshop
TI  - Screening methods for high yielding corn inbreads in honeycomb design and performances of their hybrid combinations
SN  - 970-648-116-8
PY  - 2004///
CY  - Mexico, DF (Mexico)
PB  - CIMMYT
KW  - Crop yield
KW  - AGROVOC
KW  - Heritability
KW  - Honeycombs
KW  - Inbred lines
KW  - Maize
KW  - Hybrids
KW  - CIMMYT
N2  - Selection under plant densities have been an issue of discussion but inconclusive. Troyer and Rosenbrook (1983) and Russell (1991) suggested that selection should be conducted under higher plant densities than normal growing condition to enhance grain yield in maize. Higher plant densities provide greater stress on the progenies and thus selected progenies were able to withstand stress. On the contrary, Fasoula and Fasoula (1997a) and Fasoulas and Fasoula (1995) proposed selection under isolation environment in honeycomb designs to avoid plant to plant competition, minimize soil heterogeneity, promote highest expression of genetic potential, enhance differentiation among lines and thus facilitate line selection. This study designed to compare moving circle selection, prediction criterion pc = x(x s - x] I S2p as proposed by Fasoula and Fasoula (1997b) and conventional visual grid selection (selection 1 plant out of each 19 plants in the same row). Grouped replicated R-49 honeycomb design and 40 replicated plants was used to screen 49 S7 inbreds. Moving circle selection identified highest number of diverse and good combine lines followed by PC and visual grid selection when tested in conventional plant spacing, 0.75 X 0.25 m. Top seven hybrids were derived from top-5 inbreds from moving circle selection while only 3 and 1 hybrids of PC and visual selection were included in top-7 hybrids
ER  -