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Mark K. Ehlenfeldt and Nicholi Vorsa

inheritance of this trait and an evaluation of its potential for development. Materials and Methods A parthenocarpic variant, G-176, was discovered in highbush blueberry ( Vaccinium corymbosum L.) (2n = 4x = 48) in a family of the pedigree G-105 × E-204

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Les D. Padley Jr, Eileen A. Kabelka and Pamela D. Roberts

study was to characterize the inheritance of resistance to crown rot caused by P. capsici within the Cucurbita breeding line #394-1-27-12. Materials and Methods Plant material. The Cucurbita breeding line #394-1-27-12, resistant to crown rot caused

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Winston Elibox and Pathmanathan Umaharan

mutants ( Collette, 2002 ; Collette et al., 2004 ). The objective of the study is to determine the inheritance of spathe colors based on a large number of broad-based crosses. Materials and Methods Hybridization. Seventy-seven crosses

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Naofumi Hiehata, Yoshihiko Sato, Shinji Fukuda, Yukiko Tominaga, Osamu Terai and Hirohisa Nesumi

); most of the others have undesirable fruit characteristics. In addition, the mode of inheritance of resistance to Group C has not been elucidated until now. For these reasons, progress in breeding for resistance to Group C has lagged behind that for

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Hongwen Huang, Fenny Dane, Zhongzen Wang, Zhengwan Jiang, Rehuang Huang and Shengmei Wang

Isozyme inheritance and variation in Actinidia was investigated using 23 enzyme systems. Ten isozyme loci from six enzyme systems, Acp-2, Est, Prx-1, Prx-2, Prx-4, Prx-5, Pgi-2, Pgm-2, and Tpi, were found to be inherited as single Mendelian genes in families of two interspecific crosses. Disomic inheritance detected at ten loci in progenies of a cross between the hexaploid A. deliciosa × diploid A. chinensis, provided convincing evidence that A. deliciosa is an allohexaploid. Allelic segregation for tetrasomic inheritance at ten isozyme loci was demonstrated in the progenies of a cross between the tetraploid A. chinesis × diploid A. eriantha, a result suggesting the autotetraploid origin of the tetraploid A. chinensis which apparently originated from its diploid ancestor A. chinensis. A high level of isozyme variation and heterozygosity were observed in the 22 cultivars and 56 plants of 28 Actinidia taxa. Allozyme phenotype can be used effectively for cultivar identification.

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Thomas G. Ranney, Tracy H. Thomasson, Kristin Neill, Nathan P. Lynch and Mark Weathington

specific information on ploidy of specific cultivars and clones, and information on the mode of inheritance of specific traits, would provide valuable information to better enable plant breeding programs. The objectives of this study were to determine

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Richard L. Bell

Lamb (1973) concluded that resistance was heritable and dominant. The only other published study of the inheritance of resistance to this pest confirmed the multigenic nature of genetic control and identified one quantitative trait locus (QTL) that

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Chunxian Chen, Paul Cancalon, Carl Haun and Fred Gmitter Jr.

juice quality. Development of grapefruit cultivars with low or free of FCs is a genetic improvement priority and an ultimate solution to the GJE issue. Identification of such cultivars and understanding the FC inheritance are essential for marketing and

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Norio Takada, Sogo Nishio, Masahiko Yamada, Yutaka Sawamura, Akihiko Sato, Toshio Hirabayashi and Toshihiro Saito

the mode of inheritance of the easy-peeling pellicle trait of ‘Porotan’; and 2) to trace the origin of the gene(s) controlling the trait. Tree-fruit and nut crops such as chestnuts are large trees, and the seedlings do not bear fruit or nuts for

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Jaemin Lee and Lowell C. Ewart

Most seed produced impatiens today are F1 hybrids. The seed of F1 hybrids is produced by hand-emasculation of the seed parent or the use of some types of male sterility system. The male sterility systems used in impatiens breeding have never been reported, and is proprietary information of seed companies. The objective of this study was to investigate the types of male sterility involved in impatiens. Eighteen inbreds and 14 hybrids were investigated. One sterile inbred line was selected and crossed with several inbred fertile lines for inheritance analysis. The F1 progenies were all fertile, and backcrossed to the sterile parent. The F2 and backcross populations indicate that the inheritance is controlled by a single recessive ms gene. Information concerning with a possibility of cytoplasmic-nuclear gene interaction will be discussed.