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Surawit Wannakrairoj and Haruyuki Kamemoto

A scheme for the genetic control of purple spathes in Anthurium is proposed. The recessive allele p modifies the color of anthocyanins controlled by the M and O loci. A spathe is purple when the genotype is M-O-pp. If the P locus is dominant, M-O- is red, while mmO - is orange. The p allele has no effect on the -00 (white) genotype.

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Jake Uretsky and J. Brent Loy

seed, and moreover, F 1 plants often produced normal looking fruit with the aid of a pollen donor strain. Interspecific hybrid plants have been described as vigorous and highly gynoecious, with leaf shape intermediate to parental lines, vines

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Mariem Bouhadida, Juan P. Martín, Gennady Eremin, Jorge Pinochet, María Á. Moreno, and Yolanda Gogorcena

in P. spinosa and P. avium ( Mohanty et al., 2000 , 2001 , 2002 ). Current trends in breeding stone fruit rootstocks are based on the production of interspecific hybrids, aiming at putting together favorable traits that appear in different

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Elliot H. Norden, Paul M. Lyrene, and Jose X. Chaparro

A progeny of 55 blueberry seedlings produced by pollinating 4301 flowers of tetraploid highbush blueberry cultivars with pollen from 19 different diploid Vaccinium elliottii plants was studied to determine hybridity and ploidy. Of the 21 seedlings whose phenotypes were intermediate between parental types, indicating hybridity, 18 were triploid and three were tetraploid. Pollen of the triploids, when viewed at ×250, was almost all shrunken and aborted, although some triploid hybrids produced a few large, plump microspores in dyads or monads. Triploids produced no seed when pollinated with pollen from 4x highbush or 2x V. elliottii or when open-pollinated outside the greenhouse in the presence of fertile diploid and tetraploid blueberries. Tetraploid hybrids produced large populations of vigorous seedlings when intercrossed. Both triploid and tetraploid F1 hybrids were intermediate between the parents in leaf size and flower size. The triploids produced no berries; the tetraploids were intermediate between the parents in berry size but averaged lower in Brix and berry firmness than either parent. Seven additional F1 hybrids from reciprocal crosses were obtained by pollinating 2309 flowers of 2x V. elliottii with pollen from tetraploid highbush cultivars. Although five V. elliottii clones served as female parents in these crosses, only one produced any seedlings. Six of the seven hybrids flowered and were fertile tetraploids; one was a sterile triploid.

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Avner Cohen and Amalia Barzilay

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Wenjing Guan, Dean Haseman, and Dennis Nowaskie

al., 2008 ; Sakata et al., 2008 ). Multiple species were found to be grafting compatible with cucumbers; they are Cucurbita moschata , Cucurbita maxima , figleaf gourd ( Cucurbita ficifolia ), squash interspecific hybrid ( C. maxima × C. moschata

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Qijing Zhang and Dajun Gu

markers. This article reports the first breeding and validation of an interspecific hybrid between P. tomentosa and P. salicina . Materials and Methods Breeding process. The hybrid was selected from a group of seedlings from a controlled cross between

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Xinwang Wang, Phillip A. Wadl, Cecil Pounders, Robert N. Trigiano, Raul I. Cabrera, Brian E. Scheffler, Margaret Pooler, and Timothy A. Rinehart

37 interspecific hybrid cultivars were used in this study ( Table 1 ). Lagerstroemia limii and L. subscostata were included as outgroups for phenetic analyses. To guard against plant mislabeling, leaf samples were collected from multiple sources

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Ebrahiem M. Babiker, Stephen J. Stringer, Barbara J. Smith, and Hamidou F. Sakhanokho

addition, 15 southern highbush accessions ( 2n = 4x = 48) from different blueberry breeding programs and two interspecific hybrids, ( V. corymbosum cv. Rubel × V. pallidum accession B0100) and ( V. elliottii accession B0230 × V. pallidum accession

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Kevin Lombard, Bernd Maier, Franklin J. Thomas, Mick O’Neill, Samuel Allen, and Rob Heyduck

(e.g., ‘Concord’)], muscadine ( Vitis rotundifolia ), and North American and French-American interspecific hybrid grape cultivars (A.E. Stewart, E.J. Gregory, and J.G. Karas, unpublished data). Blowing sand, which removed buds on young vines, zinc