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2006, 2007, and 2008 using standard horticultural practices. Forty-three interspecific crosses were completed in a greenhouse with at least four pollinated inflorescences per cross. The greenhouse was screened to exclude insect pollinators. All

success in obtaining the interspecific hybrids without further pursuit. In this study, we made interspecific crosses between tall-erect J. curcas and dwarf-spreading J. integerrima and obtained several F 1 , F 2 , BC 1 F 1 , and BC 1 F 2 plants. The

‘Myrobalan’ seeds. In this work, we describe a procedure for the in vitro culturing of ‘Myrobalan’ embryos to facilitate plant recovery from interspecific crosses. For this purpose, we performed different experiments with three ‘Myrobalan’ genotypes to

). However, hybridization readily occurs between species of Baptisia ( Alston and Turner, 1963 ; Baetcke and Alston, 1968 ; Dement and Mabry, 1975 ; Larisey, 1940 ; Leebens-Mack and Milligan, 1998 ). In the genus Baptisia , interspecific crosses have

University of Puerto Rico, Mayagüez (Dec. 2002). In Florida, Ferwerda (2001) evaluated BGYMV resistance in the interspecific cross G35172 × ICA Pijao. He reported that a recessive gene conferred resistance to leaf chlorosis and presented evidence of

interspecific crosses in cases in which parents varied substantially in genome size ( Fig. 2 ). Hybrids between species in the subgenera Syncarpea and Cynoxylon were readily apparent based on intermediate genome sizes including: C. capitata × C. florida

, breeding lines, and genetic stocks are preserved at 5 locations in the U.S. ( Anonymous, 2004 ). These resources offer valuable germplasm for improvement of all types of lettuce. Use of interspecific crosses of L. sativa with other related lettuce species

per hybrid and parent and the mean number of fluorescent grains calculated for each genotype. Results and Discussion Pollinations. Viable seeds were produced from interspecific crosses, but only when H. macrophylla was used as the female and H

pollination and population development Hand pollination was performed on these parental plants from June to Aug. 2007 to make interspecific crosses and produce interspecific F 1 seed ( Fig. 1 ). In the meantime, hand pollination was done to make intraspecific