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Thomas H. Boyle

Rhipsalidopsis (Easter cactus) and Schlumbergera (Thanksgiving and Christmas cactus) are two genera of epiphytic cacti endemic to southeastern Brazil. Rhipsalidopsis is comprised of two species (R. gaertneri and R. rosea) and Schlumbergera contains five species (S. opuntioides, S. obtusangula, S. orssichiana, S. russelliana, and S. truncata). There is considerable potential for the improvement of commercial cultivars in both genera. Flower color and form, plant habit, postharvest performance, and the responsiveness to floral induction treatments are selection criteria used in breeding of Rhipsalidopsis. The selection criteria used in breeding of Schlumbergera are flower color and form, growth rate, phylloclade size and shape, plant habit, and the critical daylength for flowering. Inbreeding depression, self-incompatibility, and a long generation time (1.5 to 3 years) are impediments to breeding in both genera. Interspecific hybridization has been performed in Rhipsalidopsis and Schlumbergera, and significant phenotypic variation has been observed within interspecific hybrid populations.

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Martha A. Mutschler, Jian Hua Xiong, Ahmed Wally, and Ricardo Lobato-Ortiz

Oral Session 4—Vegetable Breeding 1 Moderator: J. Brent Loy 18 July 2005, 4:00–5:30 p.m. Ballroom G

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Mark E. Herrington, Craig Hardner, Malcolm Wegener, Louella Woolcock, and Mark J. Dieters

The Queensland strawberry breeding program aims to sustainably increase profitability for the producer by selecting superior genotypes. To be effective and efficient, selection must account for several traits simultaneously and focus on: 1) the most

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Chengyan Yue, R. Karina Gallardo, Vicki A. McCracken, James Luby, James R. McFerson, Lan Liu, and Amy Iezzoni

backbone of numerous U.S. and Canadian rural communities. Rosaceous crop breeding programs have a long history of introducing cultivars with superior characteristics for production, pest and disease resistance, postharvest handling and storage, sensory

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Valdomiro A.B. de Souza, David H. Byrne, and Jeremy F. Taylor

1 Current address: EMBRAPA/CPAMN, Cx. Postal 1, Teresina, PL, Brazil. This paper represents a portion of a PhD dissertation in plant breeding submitted by the senior author. The cost of publishing this paper was defrayed in part by the payment of

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Bhimanagouda S. Patil, Kevin Crosby, David Byrne, and Kendal Hirschi

resistance. The improvement of food security to improve human health requires a paradigm shift in plant breeding to integrate nutrition ( DellaPenna, 1999 ). This will require coordination of scientists involved in plant breeding, human health, and

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Mirmahsud M. Mirzaev, Uri M. Djavacynce, David E. Zaurov, Joseph C. Goffreda, Thomas J. Orton, Edward G. Remmers, and C. Reed Funk

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N. Mutlu, D.P. Coyne, S.O. Park, and J.R. Steadman

91 POSTER SESSION 10 (Abstr. 050-084) Genetics/Breeding/Biotechnology Friday, 30 July, 1:00-2:00 p.m.

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Paul Lyrene

An Introduction to Plant Breeding . Jack Brown and Peter Caligari. 2008. Blackwell Publishing, 9600 Garsington Road, Oxford OX4 2DQ, UK. 209 p. $69.00, paperback. ISBN: 978-1-4051-3344-9. I really wanted to like this book. Well-written books

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Mengmeng Zhang, He Huang, Qing Wang, and Silan Dai

is an important breeding objective for multiflora chrysanthemum. Flowering time, an important adaptive trait that strongly influences planting area and productivity and the market price of cultivated plants, is affected by both endogenous and