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Longzhou Liu, Youyuan Chen, Zhenghong Su, Hui Zhang and Weiming Zhu

data were subjected to χ 2 analysis to ascertain the goodness of fit between the expected and observed segregation ratios for a single dominant gene and for the phenotypic data, analysis between the SCAR markers, and the CPM resistance locus. The SCAR

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Y. Aron, S. Gazit, H. Czosnek and C. Degani

The segregation pattern of individuals originating from selfing of several monoembryonic cultivars and one polyembryonic line indicated that polyembryony in mango was of genetic nature. All the plants originating from monoembryonic cultivars bore monoembryonic fruits. A one-monoembryonic to three-polyembryonic segregation pattern was observed among individuals originated from the polyembryonic line, indicating that polyembryony in mango is under the control of a single dominant gene.

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Elzbieta U. Kozik and Todd C. Wehner

An experiment was conducted to determine the genetics of chilling resistance in cucumber (Cucumis sativus L.) inbred NC-76 that was developed from PI 246930, an accession from the U.S. Department of Agriculture germplasm collection. NC-76 was crossed with ‘Chipper’ and breeding line Gy 14 to produce F1, F1 reciprocal, F2, and BC1 generations for evaluation. Cucumber seedlings at the first true leaf stage were placed in growth chambers set at 4 °C for 7 h and a photosynthetic photon flux of 500 μmol·m−2·s−1. Segregation in the F2 fit a 3 : 1 inheritance pattern, with resistance being dominant. The backcross of the F1 to the susceptible parent produced a 1 : 1 ratio, confirming that chilling resistance was from a single gene. The single dominant gene controlling chilling resistance in NC-76 was given the symbol Ch.

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Joseph N. Wolukau, Xiao-Hui Zhou, Ying Li, Yong-Bin Zhang and Jin-Feng Chen

introduction 420145) × plant introduction 420145 segregated one resistant to zero susceptible, further suggesting a single dominant gene is involved. Overall, the data indicate that resistance to GSB in accession plant introduction 420145 is conditioned by a

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Luisa Santamaria, Emmalea G. Ernest, Nancy F. Gregory and Thomas A. Evans

1958, released ‘Thaxter’, its first cultivar with downy mildew resistance ( Wester and Cetas, 1959 ). The resistance in ‘Thaxter’ was conferred by a single dominant gene derived from the P. lunatus landrace PI 164155. A new race of P. phaseoli

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Thierry Pascal, Fred Pfeiffer and Jocelyne Kervella

shape of foliar glands in peach has been reported to be associated with very high susceptibility to this fungus ( Watkin and Brown, 1956 ). This has led peach breeders to select only glandular cultivars. Among glandular cultivars, a single dominant gene

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María S. Alessandro and Claudio R. Galmarini

distribution of flowered and nonflowered plants in segregating generations supported the hypothesis that a single dominant gene controlled the early-flowering habit ( Fig. 4 and Table 3 ). Segregation ratios in the F 2 and BC 1 families were not

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Dario J. Chavez and José X. Chaparro

stable polyploids, and generation of large progenies for selection are some of the constraints that a breeder has to overcome using current methods and techniques for seedless citrus improvement. The seedless trait inherited as a single dominant gene has

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Guojing Li, Yonghua Liu, Jeffrey D. Ehlers, Zhujun Zhu, Xiaohua Wu, Baogeng Wang and Zhongfu Lu

single dominant gene in all four of the possible biparental crosses. Molecular marker-assisted selection (MAS), where molecular markers linked to the target gene facilitate the indirect selection of the linked gene in breeding populations, can

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Caihong Wang, Yike Tian, Emily J. Buck, Susan E. Gardiner, Hongyi Dai and Yanli Jia

fitted a 1:1 ratio ( P > 0.05), indicating a monogenic inheritance. This means the dwarf character from ‘Aihuali’ is highly likely to be controlled by a single dominant gene, which was designated as PcDw . ‘Aihuali’ is heterozygous for the PcDw gene