Plasmons and male sterility types in Solanum verrucosum and its interspecific hybrid derivatives

Abstract

Solanum verrucosum (2n = 24) is easily crossablewithmanydiploidspeciesandhaploids, but usually as a female partner only . All interspecific hybrids studied appeared male sterile due to interaction of S .verrucosum plasmons with genes from male parents . Seven male sterility types have been discovered in the investigations made on 21 S. verrucosum introductions and their interspecific hybrid derivatives . These are briefly discussed . S . verrucosum proves to possess at least four plasmons denoted as [Trs], [Ps'], [Svs] and fns'] . Each produces a diagnostic type of male sterility in the presence of the specific plasmon-sensitive genes which are widely spread . The role of hybrid sterility as a barrier to gene exchange between populations is discussed .

Substitutes for genome differentiation in tuber-bearing Solanum: interspecific pollen-pistil incompatibility, nuclear-cytoplasmic male sterility, and endosperm

“…Two of these interact with nuclear recessive alleles, a third with dominant ones. Similar results were reported by Abdalla and Hermsen (1972), who detected seven malesterility types in accessions of S. verrucosum and their interspecific hybrid derivatives. They proposed that this species possesses at least four plasmons, each of which produces a diagnostic type of male sterility in the presence of the specific plasmon-sensitive genes, which are widely present.…”

“…In the past, several authors observed male sterility in F 1 hybrids derived from matings involving various wild and cultivated species. In particular, male sterility has been reported to be a result of interactions between S. tuberosum cytoplasm and nuclear genetic factors in the wild species S. sanctae-rosae, S. infundibuliforme, S. raphanifolium, S. curtilobum, S. acaule, S. commersonii, S. chacoense, S. spegazzini, and S. stoloniferum (Lamm 1941(Lamm , 1953Brown 1984;Hermunstad and Peloquin 1985;Tucci et al 1996;Santini et al 2000;Carputo et al 2003b) and in other cultivated potatoes (Ross et al 1964;Grun 1973;Hanneman and Peloquin 1981), in S. verrucosum cytoplasm and nuclear genes of S. phureja, S. chacoense, and S. tuberosum (Buck 1960;Abdalla and Hermsen 1972), and in S. demissum cytoplasm and nuclear genes of S. tuberosum (Dionne 1961).…”

An evaluation of Solanum verrucosum Schlechtd. For its possible use in potato breeding

“…In these two cases pollen stainability was determined for only three plants from each population; if more plants had been checked, the stainability percentage would probably have been different. Certain types of male sterility were discovered in S. verru- cosum; these were reported by ABDALLA (1970) and ABDALLA and HERMSEN (1972b). The variability of seed set in S. verrucosum was greater than that of pollen stainability.…”

SvSv-lines is an effective tool for involvement of the valuable genepool of 1 EBN diploid potato species into breeding

“…Мужская стерильность межвидовых гибридов, полученных при использовании S. verrucosum в качестве материнских форм, является их характер ной особенностью (Abdalla, Hermsen, 1972. Она считается результатом взаимодействия специфического плазмона S. verrucosum и плазмончувствительных ядер ных генов многих видов картофеля.…”

“…Большинство растений межвидовых гибридов мужски стерильны по причине взаимодействия чувствительной цитоплазмы S. verrucosum с ядерными генами видов картофеля, которые используют в качестве опылителей (Abdalla, Hermsen, 1972). Мужски фертильные гибриды сложно вовлечь в скрещивания с культурным картофелем изза односторонней межвидовой несовместимости.…”