[Effect of different treatments of corn styles on the production of hybrid corn seed]
1993
Aedo A, Angela Cecilia
A trial was conducted with two pure lines of corn (Zea mays L) in search of an adequate management of ear silk (styles) to increase pollination, fertility and seed yield. Lines used were identified with numbers 511 and 211. Six treatments were carried out at silking consisting of two types of cuttings at the tips of the ear husk (vertical and horizontal cuttings), each of them at three different silk growth stages (initial silking, 2.5 cm and 5.0 cm in silk length). These treatments were compared with an uncut check. In the two tested lines, all the treatments were statistically superior to their checks in the evaluations of seed number, rows, and total weight of seeds per ear as well as in the fertilization percentage and seed yield. In addition, it was observed that in both lines the ears with a smaller number of seed showed a greater amount of round and bigger-sized seeds. In the evaluations of the total weight of seed per ear and yield, values tended to increase as silk cutting was done when silks were shortest. As related to the cutting type, there was a different tendency between the lines. In the line 211 horizontal cutting proved mora efficient than vertical cutting, whereas in line 511 the responses to treatment for both cutting types were similar. To conclude, silk cutting in corn ears should be carried out in the first stages of silk development to obtain a greater seed yield in lines showing the silk balling problem
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