Abstract
Seven baby corn inbreds were crossed in a complete diallel scheme. The single-cross hybrids obtained were assessed at the Sao Manuel Experimental Station, in Sao Paulo State, Brazil. The experiment was set up in a randomized complete block design with three replications, including one commercial control. The experimental plots consisted of a single row, 5 m long, with 25 plants. The traits assessed were: number of ears/plot, weight, length and diameter of husked and dehusked ears, plant height and ear height. General and specific combining ability effects (GCA and SCA) were determined. There was genetic variability among hybrids and the best hybrid (27Ax31B) was superior to the control for number of ears/plot and weight of ears dehusked. Inbreds 27 and 29 showed the best GCA effects for number of ears/plot, weight of husked and dehusked ears. The magnitude of GCA showed that the additive effects were dominant in most traits evaluated. The existence of dominance effects was also found.
Highlights
Baby corn (Zea mays L.) is a young flowering corn ear harvested two days before silking and three days after silking, depending upon the developmental conditions of the plant and size of the ear shoot size,denominated cob (Bar-Zur and Saadi, 1990)
The best experimental precision was obtained for number of ears/plot (5.8%), followed by length of husked ears (6.2%), diameter of dehusked ears (6.3%) and diameter of husked ears (7.3%)
It should be emphasized that the parental lines came from popcorn and the high prolificity is a common characteristic in popcorn populations (Gama et al, 1990)
Summary
Baby corn (Zea mays L.) is a young flowering corn ear harvested two days before silking and three days after silking, depending upon the developmental conditions of the plant and size of the ear shoot size ,denominated cob (Bar-Zur and Saadi, 1990). Seven male-sterile lines of baby corn were crossed with their respective maintainer lines, in a complete diallel design, to estimate their general and specific combining ability to select superior inbreds for several traits. General combining ability was significant for all traits, except for length and diameter of dehusked ears.
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