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Ossama Kodad, Rafel Socias i Company, Ana Sánchez, and M. Margarida Oliveira

The pistil (S-RNase) and the pollen [S-haplotype-specific F-box protein (SFB)] components of the Sf allele, presumably conferring self-compatibility in almond {Prunus amygdalus Batsch [syn. P. dulcis (Mill.) D.A. Webb]}, were identified and sequenced in ‘Ponç’, a local Spanish almond cultivar, confirming their identity with the published sequences of these components. Despite the presence of the Sf allele, the ‘Ponç’ phenotype was self-incompatible as confirmed by different pollination tests, including self pollen tube growth, fruit set after self-pollination, and fruit set in bagged branches. However, the pistil and the pollen of ‘Ponç’ were fully viable when pollinated by a cross-compatible pollen or used on a cross-compatible pistil. The fact that ‘Ponç’ presents two different S-proteins with RNase activity may indicate an active function of its Sf-RNase, whereas in the self-compatible almond cultivars thus far studied, the Sf-RNase has been inactive. This activation indicates that the presence of the Sf allele may not be the exclusive source of self-compatibility in almond, and other factors may also be involved in the expression of almond self-compatibility.

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Rafel Socias i Company, Àngel Fernández i Martí, Ossama Kodad, and José M. Alonso

Channuntapipat, C. Sedgley, M. Collins, G. 2001 Sequences of the cDNAs and genomic DNAs encoding the S1, S7, S8 and Sf alleles from almond, Prunus dulcis Theor. Appl. Genet. 103 1115 1122 Channuntapipat, C

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Shogo Matsumoto, Kentaro Kitahara, Sadao Komori, and Junichi Soejima

S-allele genotypes of nine apple (Malus ×domestica Borkh.) cultivars were identified using S-allele–specific polymerase chain reaction (PCR)–restriction fragmentlength polymorphism (RFLP) analysis. A new S-allele, Sg, was proposed to be present in `American Summer Pearmain', `Indo', `Kitanosachi', and `Meku 10'. This allele is very similar to Sf at the nucleotide sequence (92%) and deduced amino acid sequence (94%) levels.

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Doron Holland, Irit Bar-Ya'akov, Kamel Hatib, and Reuven Birger

drawbacks raised the need for new good-quality self-pollinating Israeli cultivars that contain the dominant Sf allele ( Lὁpez et al., 2001 ). Here, we describe the characteristics of ‘Matan’, a newly bred cultivar, with self-compatibility producing high

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Keiko Sekido, Yusaku Hayashi, Kunio Yamada, Katsuhiro Shiratake, Shogo Matsumoto, Tsutomu Maejima, and Hiromitsu Komatsu

. Komori, S. Soejima, J. 1999b A new S -allele in apple ‘ Sg ’, and its similarity to the ‘ Sfallele from Fuji HortScience 34 708 710 Matsumoto, S. Kitahara, K. Soejima, J. Komatsu, H

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

-compatibility of ‘Megumi’ J. Jpn. Soc. Hort. Sci. 68 236 241 Matsumoto, S. Kitahara, K. Komori, S. Soejima, J. 1999b A new S -allele in apple ‘ Sg ’, and its similarity to the ‘ Sfallele from Fuji HortScience 34 708 710 Matsumoto, S. Kitahara, K. Komatsu, H

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Toshio Hanada, Kyoko Fukuta, Hisayo Yamane, Tomoya Esumi, Ryutaro Tao, Thomas M. Gradziel, Abhaya M. Dandekar, Ángel Fernández i Martí, José M. Alonso, and Rafel Socias i Company

Channuntapipat, C. Sedgley, M. Collins, G. 2001 Sequences of the cDNAs and genomic DNAs encoding the S1, S7, S8 , and Sf alleles from almond, Prunus dulcis Theor. Appl. Genet. 103 1115 1122 de Nettancourt, D. 2001 Incompatibility and incongruity in wild and

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Hatsuhiko Okada, Yoshitaka Ohashi, Mamoru Sato, Hideyuki Matsuno, Toshiya Yamamoto, Hoytaek Kim, Tatsuro Tukuni, and Sadao Komori

. Kitahara, K. Komori, S. Soejima, J. 1999 A new S -allele in apple, ‘ Sg ,’ and its similarity to the ‘ Sfallele from ‘Fuji’ HortScience 34 708 710 Matsuno, H. Sakuma, N. Yamaga, H