Asian Journal of Plant Sciences1682-39741812-5697Asian Network for Scientific Information10.3923/ajps.2009.425.432KesornkeawP. LertratK. SuriharnB. 6200986Four cycles of modified mass selection for prolificacy
in Tein Luang Nong Bua population of small ear waxy corn at low and high
population densities (62,500 and 125,000 plants ha-1) were
completed in 2006. The initial population and eight improved populations
were evaluated at two planting densities. The objectives were to evaluate
the responses of these populations to population density and to estimate
selection responses of improved populations for agronomic characters and
ear traits. Number of ears per plant increased from 1.75 at cycle 0 to
1.84 at cycle 4 with average rates of gain per cycle of 0.03 ears per
plants at low planting density. At high planting density, the average
ears per plant increased from 1.75 at cycle 0 to 1.99 at cycles 4 with
average rates of gain per cycle of 0.05 ears per plants. Mass selection
at high population density resulted in higher response than the one at
low population density (increased by 0.07 vs. 0.05 and 0.03 vs. 0.02 ears
per plant cycle-1 for low and high planting densities, respectively).
Correlated response to selection was observed in both low and high planting
densities for plant high (2.9** and 2.8**), ear height (b = 2.3 * and
2.5*), days to tasseling (b = 0.48* and 0.53*) and days to silking (0.53*
and 0.41*). It could be concluded that mass selection under both high
and low plant densities could increase number of ears and selection under
high plant density was more effective than under low plant density.]]>Ali, E.S. and G.B. Saleh,2003Zea mays L. saccharata) populations.]]>26570Bento, D.A.V., M.A.P. Ramalho and J.C. Joao,200327887Coors, J.G. and M.C. Mardones,198929262266De Leon, N. and J.G. Coors,200242325333Department of Agriculture,1996pp: 143pp: 143Gomez, K.A. and A.A. Gomez,19842nd Edn.,Ipsilandis, C.G. and B.N. Vafias,200543139Jampatong, S., L.L. Darrah, G.F. Krause and B.D. Barry,200040605611Maita, R. and J.G. Coors,19963615271532Martin, M.W. and J.L. Lindquist,20079910661072Onenanyoli, A.H.A. and A.C. Fasoulas,1989404348Singh, M., A.S. Khehra and B.S. Dhillon,198626275278Tian, M., G. Tan, Y. Liu, T. Rong and Y. Huang,2009Globulin-1 gene.]]>56247255Uhr, D.V. and M.M. Goodman,199535785790Varga, B., Z. Svecnjak, M. Knezevic and D. Grbesa,200490203212