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I.L. Goldman

Plant Breeding and Whole-system Crop Physiology. Improving Adaptation, Maturity, and Yield. D.H. Wallace and W. Yan. 1998. CAB International. Available from Oxford University Press, 198 Madison Ave., New York, NY 10016. 390 p. $100

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Richard E. Veilleux

Anther culture has been one of the most successful techniques for generating haploid plants over a wide range of species. It is a reasonably simple procedure that can be accomplished successfully without sophisticated laboratory facilities; yet, the plants generated through anther culture can be used to demonstrate the application of many modern methods that have direct applicability to plant breeding. Anthers of diploid potato clones that have been selected for competence in anther culture can be cultured in a simple medium to yield androgenic embryos after 5 weeks. Plant regeneration requires an additional 3 to 4 weeks. Regenerated plants should be large enough 2 weeks after transfer to basal medium for ploidy determination by any of three methods depending on available facilities: chromosome counts in root tips; chloroplast counts in stomatal guard cells; or flow cytometry of nuclei released from in vitro plantlets. DNA can be extracted from anther-derived plantlets using a rapid extraction procedure to demonstrate segregation of PCR (polymerase chain reaction)-based markers such as RAPD (randomly amplified polymorphic DNA), RAMPs (randomly amplified microsatellite polymorphisms), or microsatellites. Microsatellite markers that were heterozygous in the anther donor can be used to verify haploidy in anther-derived plants. If an anther culture laboratory is scheduled early in a semester, such molecular analysis can be planned for late in the same semester.

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Robert O.M. Mwanga, Charles Niringiye, Agnes Alajo, Benjamin Kigozi, Joweria Namukula, Isaac Mpembe, Silver Tumwegamire, Richard W. Gibson, and G. Craig Yencho

The sweetpotato [ Ipomoea batatas (L.) Lam.] cultivar NASPOT 11 (Namulonge Sweetpotato 11) was approved for release by the Ugandan Plant Variety Release Committee in Apr. 2010 ( Mwanga et al., 2010 ). This is the fifth time the sweetpotato breeding

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Laura C. Merrick

Collections of crop genetic resources have been assembled and evaluated as part of plant breeding efforts and in that capacity have served as the foundation for genetic improvement of crops. Most of these collections have been held at public sector institutions, including both federal and state agricultural experiment stations. However, recent changes have occurred in government agricultural research policies and funding structure which have lead to a decline in public sector breeding programs. Breeders retire and are not replaced or, for other reasons, programs are discontinued. The loss of the breeding programs maybe adversely affecting the status of the associated germplasm, if no means are provided for continued conservation of the collections. The results of a nationwide survey to assess the number and status of crop germplasm collections associated with public sector plant breeding programs and the relationship of those collections to the National Plant Germplasm System will be discussed. Recommendations will be made in regard to coordination of activities to ensure conservation of the germplasm held in plant breeders' collections.

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Laura C. Merrick

Collections of crop genetic resources have been assembled and evaluated as part of plant breeding efforts and in that capacity have served as the foundation for genetic improvement of crops. Most of these collections have been held at public sector institutions, including both federal and state agricultural experiment stations. However, recent changes have occurred in government agricultural research policies and funding structure which have lead to a decline in public sector breeding programs. Breeders retire and are not replaced or, for other reasons, programs are discontinued. The loss of the breeding programs maybe adversely affecting the status of the associated germplasm, if no means are provided for continued conservation of the collections. The results of a nationwide survey to assess the number and status of crop germplasm collections associated with public sector plant breeding programs and the relationship of those collections to the National Plant Germplasm System will be discussed. Recommendations will be made in regard to coordination of activities to ensure conservation of the germplasm held in plant breeders' collections.

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R.J. Hutton

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Kathy Zuzek, David Zlesak, Vance Whitaker, Steve McNamara, and Stan C. Hokanson

.] is also a limiting factor. Foliar diseases defoliate plants and reduce the ornamental value, vigor, and winter survival of susceptible cultivars. A breeding program was initiated at the University of Minnesota in 1990 to develop cold-hardy, repeat

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David Jesús Gil-Ariza, Iraida Amaya, José Manuel López-Aranda, José Federico Sánchez-Sevilla, Miguel Ángel Botella, and Victoriano Valpuesta

discrimination among strawberry cultivars. The genetic diversity and organization of a representative sample of the strawberry collection was evaluated. To determine the impact of plant breeding on the available diversity for further strawberry improvement

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P. Stephen Baenziger

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James D. McCreight