Fernández i Martí Angel, Hanada Toshio, Alonso José M, Yamane Hisayo, Tao Ryutaro, Socias i Company Rafel
Unidad de Fruticultura, Centro de Investigación y Tecnología Agroalimentaria de Aragón (CITA), Zaragoza, Spain.
Sex Plant Reprod. 2009 Sep;22(3):179-86. doi: 10.1007/s00497-009-0102-7. Epub 2009 Jun 17.
Self-compatibility has become the primary objective of most almond (Prunus amygdalus Batsch) breeding programmes in order to avoid the problems related to the gametophytic self-incompatibility system present in almond. The progeny of the cross 'Vivot' (S(23)S(fa)) x 'Blanquerna' (S(8)S(fi)) was studied because both cultivars share the same S(f) allele but have a different phenotypic expression: active (S(fa)) in 'Vivot' and inactive (S(fi)) in 'Blanquerna'. In addition, the microscopic observation of pollen tube growth after self-pollination over several years showed an unexpected self-incompatible behaviour in most seedlings of this cross. The genotypes of this progeny showed that the S(fi) pollen from 'Blanquerna' was not able to grow down the pistils of 'Vivot' harbouring the S(fa) allele, confirming the active function of this allele against the inactive form of the same allele, S(fi). As self-compatibility was observed in some S(8)S(23) and S(8)S(fa) individuals of this progeny, the S(f) haplotype may not always be linked to the expression and transmission of self-compatibility in almond, suggesting that a modifier locus may be involved in the mechanism of self-incompatibility in plants.
自交亲和性已成为大多数杏仁（扁桃）育种计划的主要目标，以避免与杏仁中存在的配子体自交不亲和系统相关的问题。对杂交组合‘Vivot’（S(23)S(fa)）בBlanquerna’（S(8)S(fi)）的后代进行了研究，因为这两个品种都共享相同的S(f)等位基因，但具有不同的表型表达：‘Vivot’中为活性（S(fa)），‘Blanquerna’中为非活性（S(fi)）。此外，多年来对自花授粉后花粉管生长的显微镜观察表明，该杂交组合的大多数幼苗表现出意想不到的自交不亲和行为。该后代的基因型表明，‘Blanquerna’的S(fi)花粉无法在携带S(fa)等位基因的‘Vivot’雌蕊中生长，证实了该等位基因对同一等位基因的非活性形式S(fi)具有活性功能。由于在该后代的一些S(8)S(23)和S(8)S(fa)个体中观察到了自交亲和性，S(f)单倍型可能并不总是与杏仁中自交亲和性的表达和传递相关联，这表明一个修饰基因座可能参与了植物自交不亲和的机制。
