CHESTNUT HILL, MASSACHUSETTS
Boston College
Regeneration of plantlets in diploid maize
--Ting, YC, Tran, L

In the summer of 1998, about 10 diploid maize plants were grown in the field. This maize strain came from Corn-Nuts Inc., California as a gift of Dr. D. L. Shaver. It grew in the Boston area as a semiperennial because it failed to regrow from the previous root stock in the second year. During most of the growth period, all of these plants grew vigorously. However, in the middle of September, it was noticed that one of the plants was shorter than the rest. The short plant was apparently slow in growth, with shortened internodes and thick leaf laminae. At the end of September, a male inflorescence developed normally, but only a few antheses appeared. Shortly afterward, some plantlets generated from the spikelets. In the second week of October, five of the plantlets were removed and planted in the greenhouse. They stayed green and alive for nearly two months. Then they discontinued growth. In 1946, Singleton (J. Hered. 37:61-64) reported plantlet generations of a diploid sweet corn. His attempt to grow the plantlets upon removal from the original plant was unsuccessful. He further found that the characteristic of plantlet generation was possibly attributed to a recessive gene, id. The reversion of floral meristem to juvenile shoot meristem as was observed in the present study may also be due to a recessive gene. For developmental genetics, it may be a valuable material of investigation.


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