Cytogenetic studies on the F1 hybrid Solanum incanum L. x Solanum melongena L. variety ‘Giant of Banaras’
ABSTRACT This paper presents a morphological and cytogenetic account of Solanum incanum, S. melongena variety Giant of Banaras and their F1 hybrid. A close inter-relationship between the two species is recognized and hybrid vigour for height of plant and number of branches, flowers and fruits as well as for resistance against drought and fruit and shoot borers is demonstrated.
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- "The inconsistencies and misconceptions generated by these factors have made past attempts at taxonomically resolving the complexities associated with the genus difficult. The taxonomic uncertainties still persist in this genus largely because previous studies to address the taxonomic problem of vegetable Solanum have focused mainly on morphology (Karihaloo and Rai, 1995; Kumar et al., 2013), crossability and F1 fertility (Baksh, 1979; Hassan and Lester, 1990a; Lester and Hassan, 1991; Furini and Wunder, 2004) and anatomy (Hassan and Lester, 1990b). Establishing genetic affinities on such parameters are insufficient, as Solanum makes successful crosses with putative progenitors as well as distantly related species. "
ABSTRACT: Solanum L., the largest genus of the Solanaceae family, vary morphologically, is diverse in number and is ecogeographically distributed. In Nigeria, previous studies had focused mainly on chromosome morphology, genome description and medicinal values, which are insufficient for genetic affinities. This study used four highly polymorphic random amplified polymorphic DNA primers to describe both the genetic relatedness and variability among 25 accessions of eggplant from Southwestern Nigeria. At a truncated line of 65%, five clusters and two ungrouped samples are distinguishable from the dendrogram. The data reveals that Solanum dasyphyllum Schum. & Thonn. is more closely related to Solanum macrocarpon L. than to Solanum melongena L. The relatedness between Solanum incanum L. and Solanum melongena, a probability of being progenitors from a common ancestral lineage was also shown. Occurrence of Solanum scabrum L. and Solanum nigrum L. in the same clusters different from S. melongena, is an indication of distant relatedness to S. melongena but close relatedness between them. High level of polymorphism was observed in this study going by the coefficient of variation which exhibited a good separation from a conserved region of the genome. This study, therefore, reveals a wide and diverse genetic base in Nigerian eggplant Solanum. Key words: Eggplant, genome, synonymy, polymorphism, phylogenetic.International Journal of Genetics and Molecular Biology 01/2014; 6(1):1 - 7. DOI:10.5897/IJGMB2013.0089
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- "incanum have been frequently confused with the less closely related Scarlet eggplant Solanum aethiopicum L . , the Gboma eggplant Solanum macrocar - pon L have been established , considering mainly morphological features , crossability and F 1 fertility ( Baksh 1979 ; Lester and Hasan 1991 ) . These parameters are , however , insuf - ficient for establishing genetic affinities , because S . "
ABSTRACT: A total of 94 Solanum accessions, including eggplants and related species, were morphologically characterized based on greenhouse observations, and molecularly analysed by the AFLP technique. Morphological parameters were helpful in assessing similarities or differences among accessions, and molecular data were used to support morphological conclusions. A dendrogram was computed based on the Dice genetic distances using the neighbour-joining method. The analysis was efficient in the assignment of a species name for eight out of nine accessions that were not previously classified, and revealed that 14 further accessions were misnamed in the collection originally received. The results indicate that the taxonomy of Solanum sections and subgenera including several species should be reconsidered. The AFLP technique was revealed as an efficient tool in determining genetic relationships among species. In general, morphological observations were consistent with molecular data, indicating that both approaches complemented to define the phylogenetic status of a large genus like Solanum. In terms of eggplant breeding, the molecular analysis of the Melongena complex, and of the other sections of the subgenus Leptostemonum, establishes useful germplasm relationships in the gene pool available for the genetic improvement of the cultivated species. The results we have provided highlight an urgent necessity to include molecular parameters in handling and characterizing the genebank-deposited germplasm related to cultivated crops.Theoretical and Applied Genetics 02/2004; 108(2):197-208. DOI:10.1007/s00122-003-1439-1 · 3.51 Impact Factor