Barriers to hybridization of Solanum bulbocastanumDun. and S. VerrucosumSchlechtd. and structural hybridity in their F1 plants

  title={Barriers to hybridization of Solanum bulbocastanumDun. and S. VerrucosumSchlechtd. and structural hybridity in their F1 plants},
  author={John G. Th. Hermsen and Munikote S. Ramanna},
SummaryResults of reciprocal crosses between Solanum verrucosum (2n=2x=24) and S. bulbocastanum (2n=2x=24) are described in terms of pollen tube behaviour in styles, of berry and seed set, of fertility and of meiotic behaviour of the F1 hybrids. Pollen tube growth of S. verrucosum is strongly inhibited in styles of S. bulbocastanum, whereas no inhibition is observed in the reciprocal cross. Therefore S. bulbocastanum x S. verrucosum fails to set berries or seeds, whereas the reciprocal cross… 
Production of Hybrids Between the 2EBN Bridge Species Solanum verrucosum and 1EBN diploid Potato Species
The objective of this study was to develop an efficient technique for using 1EBN species in breeding by crossing to 2EBN bridge species S. verrucosum, and to produce plants with the distinctive phenotypic characteristics and molecular markers specific to their1EBN parents.
Successful hybridization of non-tuberous Solanum etuberosumLind. and tuberbearing S. pinnatisectumDun.
It is suggested that this hybrid together with those between the tomato, Lycopersicon esculentum, and S, pennellii and S. lycopersicoides constitute piers of a bridge between tomato and potato species which in the future might enable gene transfer between these two crops via their wild relatives.
Introgression of resistance to late blight (Phytophthora infestans) from Solanum pinnatisectum into S. tuberosum using embryo rescue and double pollination
The view that transfer of valuable characters from S. pinnatisectum to S. tuberosum is feasible is supported; however, aneuploidy and the presence of univalents may inhibit this effort.
Re-evaluation of Monohaploid Solanum verrucosum and S. bulbocastanum (2n = x = 12) and Dihaploid S. stoloniferum and S. acaule (2n = 2x = 24), All Derived from Anther Culture
Each of these haploid-plant genomes is homozygous and is suitable for whole-genome sequencing, suggesting that the alleles are fixed in homoeologous loci.
Overcoming unilateral incompatibility in crosses with wild allotetraploid potato species Solanum stoloniferum Schldtl. & Bouchet
The germplasm of valuable for breeding wild allotetraploid potato species Solanum stoloniferum is rarely used because of pre- and postzygotic reproductive barriers with cultivated potatoes and one of the factors that complicate crosses is unilateral incompatibility (UI).
The introgression of 2× 1EBN Solanum species into the cultivated potato using Solanum verrucosum as a bridge
Wild diploid Solanum species with an endosperm balance number (EBN) of one are a rich source of disease resistance, pest resistance, and tuber quality traits. They are not sexually compatible with 4×
Unilateral and bilateral hybridization barriers in inter-series crosses of 4x 2EBN Solanum stoloniferum, S. pinnatisectum, S. cardiophyllum, and 2x 2EBN S. tuberosum haploids and haploid-species hybrids
It is found that pre- and post-zygotic barriers prevented seed formation in crosses involving S. stoloniferum, and the presence of functional and nonfunctional S-alleles may explain interspecific incompatibility in intra- and inter-ploidy crosses.
Novel inter-series hybrids in Solanum, section Petota
Based on the analysis of post-zygotic reproductive barriers among isolated species of section Petota, strategies to overcome such incompatibilities are proposed.
Production of male fertile interspecific hybrides between cultivated potatoes and valuable for breeding allotetraploid species Solanum stoloniferum
  • A. Levy, A. S. Ageeva
  • Biology
    Proceedings of the National Academy of Sciences of Belarus, Biological Series
  • 2019
The results of application of original SvSv-lines for overcoming UI in crosses with S. stoloniferum and of generating male fertile hybrids derived from this species are presented.
Variation for 2n pollen production and male fertility in wildSolanum germplasm resistant toPhytophthora infestans (Mont.) de Bary (US-8)
Wild potato species possess genetic variability for valuable traits including resistance toPhytophthora infestans, the causal agent for potato late blight disease. Breeding schemes using 2n gametes


Crossability, fertility and cytogenetic studies in Solanum acaule × Solanum bulbocastanum
Evidence is presented that the 4x-F1's originated from unreduced gametes produced by two bulbocastanum accessions, and the genomic constitutions of the F1's adequately accounted for these fertility relations.
Double-bridge hybrids of Solanum bulbocastanum and cultivars of Solanum tuberosum
The quadruple hybrids (‘double-bridge’ hybrids) appear good starting material for breeding programmes aimed at introducing genes from S. bulbocastanum into S. tuberosum cultivars.
Experimental self- and cross-pollinations showed that the species is highly self-steriles and consists of cross-sterile and crossfertile individuals, which may be due to the presence of incompatibility factors or to triploidy.
Meiosis in different F1-hybrids of Solanum acauleBitt. x S. bulbocastanumDun. and its bearing on genome relationship, fertility and breeding behaviour
SummaryMeiosis was studied in some triploid, tetraploid and hexaploid F1-hybrids from Solanum acaule x S. bulbocastanum and in a triploid F1-hybrid from S. acaule x S. tuberosum-haploid.The only
Unilateral ‘eclipse sterility’ in reciprocal crosses between Solanum verrucosumSchlechtd. and diploid S. Tuberosum L.
A critical cytological study revealed that meiosis in pollen mother cells is completely normal, and when eclipse sterility is involved, the nucleus in the young microspore does not divide any more after meiosis and some kind of plasmolytic process occurs in themicrospore leading to the characteristic eclipselike appearance.
Summary The results are given of crossing fifteen Central and South American wild Solanum species included in the series Conicibaccata, Demissa, Longipedicellata and Piurana. Nearly all the 210
Studies on the use of Solanum acaule as a bridge between Solanum tuberosum and species in the series Bulbocastana, Cardiophylla and Pinnatisecta
Preliminary results have indicated that Solanum acaule can serve as an intermediate for gene transfer from Solanum species in the Mexican series Bulbocastana, Cardiophylla and Pinnatisecta to Solanum
Somatic chromosome elimination and meiotic chromosome pairing in the triple hybrid 6x-(Solanum acaule × S. bulbocastanum) × 2×-S. phureja
The results support the view, that the transfer of valuable characters from S. bulbocastanum to S. tuberosum cultivars is feasible even when these characters are polygenically controlled.
Inheritance of resistance to Phytophthora infestans in two diploid Mexican solanum species
Inheritance of resistance to Phytophthora infestans in the diploid Mexican species S. bulbocastanum and S. verrucosum appears to be quantitative and sibbing or selfing apparently improves the degree of resistance in the progeny over that of the parents.
Somatoplastic Sterility as a Cause of Seed Failure after Interspecific Hybridization.
The histological changes leading to failure of fertile ovules of this kind are described and it is shown that essentially the same changes attend seed failure following certain interspecific and intergeneric matings.