Interchromosomal connections and metaphase 1 clumping in meiosis of two ,i>Capsicum Linn. species in Nigeria

The occurrence of interchromosomal connections in two species of Capsicum; Capsicum annuum L. and Capsicum frutescence L., from Nigeria is reported. Clumping of metaphase 1 chromosomes is also reported for these two species. The degrees of incidence of the interchromosomal connections and metaphase 1 chromosomes clumping have been determined. The probable relationship between the chromosomal connections and metaphase 1 clumping and the possibility of their being a useful ecological adaptation are discussed

Inheritance of characters in kenaf (Hibiscus cannabinus)

This investigation was carried out to study the inheritance pattern in intraspecific crosses involving two local varieties of Hibiscus cannabinus L. One variety has pink flowers and resistance to root knotnematode, while the other variety has light yellow flowers but susceptible to root knot nematode. Results show that the inheritance of pink flowers and resistance to root knot nematode was controlled by two independently assorting genes with both dominant alleles ‘P’ and ‘R’ producing plants having pink flowers and resistant to root knot nematode, while their recessive alleles ‘p’ and ‘r’ produced plants having light-yellow flowers and susceptible to root knot nematode, respectively

Segregation of genes controlling seed colour in sesame (Sesamum indicum linn.) from Nigeria

Genetic analysis of seed colour was carried out on crosses involving nine accessions of Sesame (Sesamum indicum L.) from Nigeria. Inheritance studies showed that different gene actions were responsible for the expression of this important character. In three of the crosses, single gene action was observed, while in two others, the trait was under the control of two genes. In the sixth cross, involving white and black parents, an array of white, black, brownish white and brown colours were observed in the F2. The variation in gene systems controlling seed colour expression observed in this study revealed the complex nature of the expression of this trait. Results also indicated that plants with the same seed colour might be under different genotype constitution

Intra and interspecific hybridization in the genus "capsicum"

No Abstract

Meitoic and pollen studies on some F1 hybrids between Sesamum inndicum and Sesamum radiatum

No Abstract.Nigerian Journal of Genetics Vol. 18 2003: pp. 59-6

Further observations on the hybrids of Sesamum indicum and Cerathotheca sesamoides

No Abstract.Nigeria Agricultural Journal Vol. 38 2007: pp. 135-14

Chromosome studies in Sesamum indicum

No Abstract.Nigerian Journal of Genetics Vol. 20 2006: pp. 61-6

Interspecific Hybridization between Sesamum indicum L. and Ceratotheca sesamoides Endl

Sesamum indicum L. (2n = 26) and Ceratotheca sesamoides Endl. (2n = 32) were crossed to investigate their genomic relations and feasibility of gene exchange. Results showed that crossability between the two species was low. Pollen viability was drastically reduced in the F1 hybrids. This was attributed to meiotic abnormalities such as univalent and multivalent associations, non-disjunction bridges, and presence of fragments and micronuclei. Findings from this study also imply that gene exchange between Sesamum indicum L. and Ceratotheca sesamoides Endl. is possible. The implications of these results in the species evolution are discussed

Inheritance of Hairiness of Stem and Petiole in a Selection from Local (Nigeria) Germoplasm of Sesame

Character differences were studied in inter specific crosses involving Sesamum indicum L. and Ceratotheca sesamoides Endl. Results show that inheritance of many hairs on stem and petiole was controlled by two independently assorting genes with both dominant alleles S- and P- producing many hairs in stem and petiole respectively. Only the genotypes sspp homozygous for both recessive alleles were plants with few hairs. The implications of these findings in the species evolution are discussed

Phenotypic variations among newly selected roselle (Hibiscus sabdariffa Linn.) genotypes in Nigeria

Phenotypic investigation was conducted on twenty newly selected genotypes of Nigerian Roselle (Hibiscus sabdariffa L) using visual character markers. These markers include: stem colours, stem hairiness, leaf colour, leaf hairiness, leaf shape, petiole colour, petiole hairiness, calyx colour, calyx hairiness and epicalyx colour. The experiment was conducted in the 2013 and 2014 growing seasons to ascertain the consistencies of the traits. Distinct variations were obtained among the new Roselle genotypes in terms of the parameters studied. Consistencies were observed in all the visual markers used except the flower colour; these consistencies indicate that the variations are not caused by environmental factors, such variations are good for selection and improvement. Whereas, the inconsistency in the flower morphology might be due to environmental influences. It is therefore concluded that Nigerian Roselle genotypes differ in some of their phenotypic (visual) characters which could be used for the improvement of the crop. Therefore, a scientific agro-metrical and molecular characterization is necessary to ascertain the genetic diversity that exist among these new selected Roselle genotypes in Nigeria. This will enhance the selection for improvement of the crop in the future.Keywords: Visual Characters, Leaf shape, Calyx Colour, Selection, Improvemen