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Rayane Barcelos Bisi, Rafael Pio, Daniela da Hora Farias, Guilherme Locatelli, Caio Morais de Alcântara Barbosa, and Welison Andrade Pereira

define the compatibility level between cultivars, complementing and corroborating the results observed in the field ( Jacquemart, 2007 ). Self-incompatibility based on S-RNase occurs in Rosaceae species. Compatibility is controlled by the polymorphic S

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Júlia Halász, Attila Hegedűs, Zoltán Szabó, József Nyéki, and Andrzej Pedryc

et al. (1999) . Allele-specific primers were designed and used to analyze compatibility relationships among five cultivars. The aim of this study was to identify self-incompatibility alleles in commercially significant plum and pluot cultivars with

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Gaetano Distefano, Giuseppina Las Casas, Stefano La Malfa, Alessandra Gentile, Eugenio Tribulato, and Maria Herrero

empirically expected to be self-incompatible based on the fact that they produce seedless fruit when planted in solid blocks. In the present study, the pollen-pistil incompatibility is characterized, and the self- and intercultivar compatibilities in six

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Shirley Miller, Peter Alspach, Jessica Scalzo, and John Meekings

cross-pollination between cultivars is widely acknowledged by commercial growers, there is little information available on cultivar compatibility for home gardeners. Thus, when a new blueberry cultivar becomes available to the retail sector, one of the

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Irene E. Palmer, Thomas G. Ranney, Nathan P. Lynch, and Richard E. Bir

, to evaluate self-compatibility and crossability between species, to determine interploid crossability among R. hirta cultivars, and to assess reproductive pathways in triploid R. hirta to better facilitate future Rudbeckia breeding projects

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Hitomi Umemura, Katsuhiro Shiratake, Shogo Matsumoto, Tsutomu Maejima, and Hiromitsu Komatsu

. Sci. Biotechnol. 82 323 329 Matsumoto, S. Kitahara, K. 2000 Discovery of a new self-incompatibility allele in apple HortScience 35 1329 1332 Matsumoto, S. Komori, S. Kitahara, K. Imazu, S. Soejima, J. 1999a S-genotypes of 15 apple cultivars and self-compatibility

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Viviane de Oliveira Souza, Margarete Magalhães Souza, Alex-Alan Furtado de Almeida, Joedson Pinto Barroso, Alexandre Pio Viana, and Cláusio Antônio Ferreira de Melo

equal to 0.06. However, through self-pollination was verified fruit production, even in low percentage, indicating that species under study may present a certain degree of self-compatibility, once the fertilization rate was 25%. Species that present

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José Manuel Alonso and Rafael Socias i Company

Pollen tube growth after selfing was studied in four almond (Prunus amygdalus Batsch) families derived from crosses between self-compatible `Tuono' and self-incompatible `Ferragnès' and `Ferralise' in both directions, in order to ascertain the phenotypic expressions of the different genotypes. A differential expression of self-compatibility was observed in the seedlings of the different families. The genetic self-compatible offspring of `Ferralise' showed a lower percentage of pistils with pollen tubes at the style base and a lower number of pollen tubes at the pistil base after self-pollination than those observed in the self-compatible offspring of `Ferragnès'. This low level of self-compatibility expression observed in some `Ferralise' seedlings may be due to the inbreeding present in `Ferralise'. As a consequence, caution must be taken in almond breeding to avoid the increase of inbreeding by the utilization of related parents and to diversify the sources of self-compatibility, at present mostly limited to `Tuono.'

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Samantha Jay Forbes, Guiliana Mustiga, Alberto Romero, Tobin David Northfield, Smilja Lambert, and Juan Carlos Motamayor

artificial pollination of flowers (see previous section) was conducted between the paternal genotype PBC123 and the three maternal genotypes (M01, PBC123, and MCC02) ( Table 1 ). PBC123 was selected as the original pollen donor for its reported self-compatibility

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Nachida Ben-Njima

Group-author : R. Socias i Company

Pollen tube growth was studied in 10 almond [Prunus amygdalus Batsch, syn. P. dulcis (Mill.) D.A. Webb] selections of the Zaragoza breeding program, whose main objective is the development of self-compatible cultivars. Self-compatibility was evident in eight of the selections, as indicated by the fact that pollen tube growth was similar following self- and cross-pollination. In the other two selections, pollen tube growth differed following self- and cross-pollination, one showing self-incompatibility and the other an irregular progression of crossed pollen tubes. The importance of the style in sustaining pollen tube growth was evident, and pollen tube growth was influenced by style type.