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Year Vol.
(Issue) Pages Author(s) Title

1980 3(2) 65-68 R. J. Henny, Eleanor M. Rasmussen Growing and breeding Dieffenbachia (Buy)
ABSTRACT: At the Agricultural Research Center - Apopka we have been studying the breeding potential within the genus Dieffenbachia. One goal of this program is the development of new and better varieties of Dieffenbachia for commercial production in Florida. Another important objective is to study the reproductive mechanisms of fJieffenbachia and learn more of their biology and how it relates to all tropical plants in general and other aroids in particular. Such studies include research into factors affecting plant growth, flowering, pollen and seed production and storage and inheritance of various plant characteristics (leaf and petiole variegation, growth habit, etc.).

1980 3(3) 94-95 R. J. Henny, Eleanor M. Rasmussen Producing Dieffenbachia from seeds
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ABSTRACT: Although the flower structure and pollination method are known (1), difficulty in obtaining seed from selected crosses is a major reason that few hybrid Dieffenbachia exist. However, recent studies at the Agricultural Research Center - Apopka concerned with environmental factors affecting seed production in Dieffenbachia have led to greatly improved seed yields and made hybrid production easier.

1980 3(3) 96-97 R. J. Henny, Eleanor M. Rasmussen Stimulation of flowers in Dieffenbachia
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ABSTRACT: Dieffenbachia breeding has been hindered by sporadic flowering and the small number of inflorexcences per plant. In attempting to surmount this problem we initiated experments to see if it would be possible to control flowering using the plant hormone gibberellic acid (GA3,. The study was conducted on full-sized plants of Dieffenbachia maculata 'Perfection' grown in 6-inch pots. Treated plants were sprayed on their upper and lower leaf surfaces until runoff with either 250, 500 or 1000 parts per million GA3 while control plants were sprayed with water only. Ten plants were tested at each of the four GA3 levels and plants were maintained in a greenhouse held at 65-90oF temperature range. GA 3 was tested because it had previously been shown to induce flowering in many crops as well as some aroids (1,2,3,4).

1982 5(4) 99-100 R. J. Henny Breeding guidelines in the genus Aglaonema
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ABSTRACT: The purpose of this report is to describe the techniques of Aglaonema hybridization at ARCApopka and hopefully encourage other people to attempt crosses on their own. A list of aglaonemas useful for breeding is also included (Table 1).

1982 5(4) 107-109 R. J. Henny Dieffenbachia breeding: Transmission of foliar variegation to hybrids
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ABSTRACT: Although Dieffenbachia hybrids have been reported from the late 1900s (1), nothing has been published concerning the inheritance of foliar variegation. Recent information concerning growth (2), control of flowering (4), and inducement of maximum seed set (3) has made Dieffenbachia breeding much more feasible.

1982 5(4) 110-111 R. J. Henny Dieffenbachia breeding: Presence of fertility and sterility in parents and their hybrids
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ABSTRACT: The single remaining barrier to hybridization involves sterility in collected stock plants or in naturally and artificially produced hybrids. Knowledge of the fertility or sterility of parental plants to be used in a breeding program, as well as their subsequent hybrids, is critical to anyone interested in pursuing Dieffenbachia breeding. This paper is a summary of results obtained at the Agricultural Research Center-Apopka regarding fertility and sterility of 34 breeding lines of Dieffenbachia and their hybrids.

1983 6(3) 71-72 R. J. Henny Stimulation of flowering in Aglaonema with gibberellic acid (GA3)
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ABSTRACT: Recent discoveries of new types of Aglaonema with unusual foliar variegation patterns and petiole colorations have increased the breeding potential for this genus. Potential for development of exciting new hybrids has never been greater. For such promise to be realized, however, it is necessary to be able to induce simultaneous flowering of different Aglaonema species and cultivars.

1983 6(4) 135-136 R. J. Henny, W. C. Fooshee Flowering of Aglaonema with gibberellic acid (GA3) A follow up report
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ABSTRACT: As a routine part of our foliage breeding program, we treated several plants with 250 ppm GA3 (our normal rate) on November 10, 1982. The results were phenomenal! Treated plants had open flowers in mid-April and continued to produce new blossoms into July_ Some plants, growing in 8-inch pots with 3-4 stems produced upwards of 50 inflorescences during this t ime (Figures 1 [, 2). As in previous studies, flowers were normal in appearance and fertile. In addition, unrelated species and cultivars again flowered simultaneously enabling cross pollination attempts.

1984 7(1) 9-11 R. J. Henny Aglaonema Breeding: Transmission of foliar variegation from three species to their hybrids
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ABSTRACT: Aglaonema possess several unique patterns of foliar variegation which makes them ideal for breeding and genetic studies. This article presents information concerning inheritance of foliar variegation from three Aglaonema species. Aglaonema commutatum Schott var. picturatum 'Treubii,' A. crispum (Hort. Pitcher & Manda) Nicols. 'Chartreuse Halo'; and A. nitidum (Jack) Kunth 'Curtisii' were thecultivars used in this study.

1988 11(2) 15-22 R. J. Henny Aglaonema Breeding (Buy)
ABSTRACT: Historically, the origin of Aglaonema cultivars has depended upon introduction of species collected in the wild or selection of mutations of commonly grown species observed by collectors or nurserymen. BreedingÂ· has played a small role in new cultivar development, although four important commercial cultivars have resulted from hybridization.