Philippine Science Letters
vol. 6 | no. 1 | 2013
published online March 8, 2013


ARTICLE


Development of hibiscus hybrids ‘Women in Public Service Series II’ and propagation studies on Hibiscus rosa-sinensis ‘Cynthia A. Villar’


by Pablito M. Magdalita1* and Reynold B. Pimentel2

1Crop Science Cluster and Institute of Plant Breeding, College of Agriculture,
University of the Philippines Los Baños, 4031 College, Laguna, Philippines
2Del Monte Philippines Inc., Camp Phillips, Bukidnon





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The breeding and selection of hibiscus have been conducted since 1995 at the breeding nursery of the Institute of Plant Breeding (IPB), Crop Science Cluster (CSC), University of the Philippines Los Baños (UPLB), to continuously develop new hybrids. Seven hybrids with unique and new flower traits plus suitable plant growth habit were selected. The seven hybrids, collectively called the ‘Women in Public Series II’, were named after outstanding and dedicated Filipina public servants. These hybrids are: i) Hibiscus rosa-sinensis ‘Domini M. Torevillas’, a dark orange (RHCC 28 A) flower with dark red eye zone and light red blushes radiating to the petals; ii) H. rosa-sinensis ‘Cynthia A. Villar’, an orange (RHCC 28B) flower with red eye zone (RHCC 45B) surrounded by pinkish halo; iii) H. rosa-sinensis ‘Marilyn D. Marañon’, a lemon yellow (RHCC 8 A) flower with white eye zone (RHCC 25 A) surrounded by pinkish halo; iv) H. rosa-sinensis ‘Maria Rosario O. Montejo’, a red orange (RHCC 45 B) flower with pinkish red eye surrounded by yellow edges; v) H. rosa-sinensis ‘Arlene B. Arcillas’, a carmine rose (RHCC 52C) flower with cardinal red eye (RHCC 53C); vi) H. rosa-sinensis ‘Connie S. Angeles’, an orpiment orange (RHCC 25 A) flower with cardinal red eye (RHCC 53 A) surrounded by pinkish halo; and vii) H. rosa-sinensis ‘Sylvia P. Lina’, a neyron rose (RHCC 56A) flower with magenta eye (RHCC 66A). These hibiscus hybrids have been registered with the Germplasm and Technology Release and Registration Office (GTRRO) of the IPB-CSC. Propagation studies on Hibiscus rosa-sinensis ‘Cynthia A. Villar’ were conducted to explore the use of techniques that could enhance rapid propagation of the new variety. Among the three hibiscus varieties tested, the var. ‘Wilcox’ had significantly the highest percent success for use as rootstock in comparison to var. ‘Reddy or Not’ and ‘Petite Peach’. Among the three propagation methods used, marcotting had significantly the highest percentage (95.83%) of success in producing asexually propagated plants compared to cleft-grafting and budding. In addition, marcots treated with Biospark Trichoderma significantly produced a higher number of adventitious roots than marcots treated with the rooting hormone or the combination of rooting hormone and Biospark Trichoderma.


*Corresponding author
Email Address: magdalitapm@yahoo.com
Submitted: August 10, 2012
Revised: January 10, 2013
Accepted: January 12, 2013
Published: March 8, 2013
Editor-in-charge: Eduardo A. Padlan
Reviewers:
Susan C. Aquino-Ong
Cecilia B. Pascual