Inter-relations of growth and disease expression in pepper using principal component analysis (PCA)

Field reactions of 12 indigenous pepper lines (UNS2, UNS3, NSKY-LP, Atanukwu yola, Sombe, NSKY-SE, Tarugu, Tartasi, Dangarawa, Oshosho, NSKY-RW and a Hybrid between Sombe and NSKY-RW) for resistance to pepper veinal mottle virus (PVMV) were determined with principal component analysis (PCA). Genetically related genotypes tend to cluster, indicating that there is a significant genetic component to the underlying patterns of variations in growth and disease attributes. The PCA showedthat the vegetative trait had high PRIN 1 value, thereby suggesting that the trait could be used to assign pepper genotypes into different agronomic groups. Similarly, the disease characters were the main determinants of PRIN 2 thus, implicating them as additional useful traits for classification of pepperline

Location Effects On The Growth, Yield And Flavour Expression Of Nsukka Aromatic Yellow Pepper

A two-locational trial comprising four varieties of the Nsukka aromatic yellow pepper was carried out in Umudike and Nsukka in 1999. The main objective was to investigate the influence of the environmental differences on growth, yield, aroma and susceptibility of the crop to the pepper leaf curl geminivirus. Except for aroma, significant (

Heritable relationships and variability of yield and yield components in vegetables cowpea

No Abstract

Inheritance of fruit size in lycopersicon species

No Abstract. Agro-Science Vol. 3(1) 2002: 13-1

Population performance of F3 progenies obtained from interspecific 1 crosses between the wild and cultivated tomatoes

Large populations of four F3 families namely: Wild x Roma, Wild x Local, Wild x Tropical were evaluated for growth, yield and yield components under rained conditions of the derived savannah ecology of Nigeria. The results showed that the progenies did not cultivate tomatoes, Local x Tropical was taller than the progenies with the wild parentage. The reverse was however, the case with respect to the number of branches, trusses and fruits per plant as the offsprings with the wild parentage performed better than the hybrids obtained from the two cultivated tomatoes. The existence of transgressive segregants in all the families is a positive indication that selection would be effective in the improvement of the metric traits.Bio-Research Vol. 3(1) 2005: 1-

Breeding progress in tomato with pedigree selection and first generation hybrids

No Abstract. Discovery and Innovation Vol. 17(3&4) 2005: 198-20

Homogeneity test of anthocyanin genes among segregating cowpea families

No Abstract.Nigerian Journal of Genetics Vol. 15 2000: pp. 41-4

Juvenile morphological markers for maleness in fluted pumpkin (telfairia occidentalis hook f.)

Six hundred seeds extracted from nine pods of fluted pumpkin (Telfairia occidentalis Hook F.) were sown in the field in 2004 and 2005 to determine the juvenile morphological markers for maleness. The result showed a significant difference (

Hybrid vigour and gene action for two quantitative traits of castor plant (Ricinus communis L.)

Five homozygous lines of castor plant, namely RS1-Om, RN1-Om, RTl-2m, RSl- Owm, and RNl- Omb, were crossed to raise F1, F2, BC1, and BC2 generations. The hybrids were tested for hybrid vigour for two metric traits, viz; number of pods per plant and seed yield per plant. Highly significant hybrid vigour was detected for both traits in all the crosses. The contributions of additive and non-additive gene effects to both traits were also investigated. Additive gene effects were more relevant in the inheritance of number of pods per plant. The effects of the digenic interactions, coupled with the highly significant additive gene effects on number of pods per plant in most of the crosses, tend to suggest that improvement of the character can be enhanced by the use of breeding methods such as the reciprocal recurrent selection that would encourage the concentration of genes involved in the inheritance of the trait. The contributions of dominance gene effects to the total genetic variance were positive and highly significant in both pod and seed yield per plant in all the hybrids. This would tend to favour hybridization and the use of first generation hybrids as an effective means of improving both traits in castor plant. Thus, reciprocal recurrent selection and the use of hybrid programmes are the breeding strategies suggested for the improvement of pod and seed yield in castor plant. Ghana Jnl agric. Sci. Vol.31(1) 1998: 81-8

Expression of heterosis in floral traits and fruit size in tomato (Solanum lycopersicum) hybrids

The present research was prompted by lack of improved tomato cultivars adapted to the humid tropical. Tomato hybrids were developed by crossing wild and cultivated tomato varieties. The average fruit size of the tomato hybrids generated did not meet the level of acceptability in the local market. A modified three way cross between the advanced generation of the tomato hybrids and an exotic variety with giant fruit size was initiated. The resulting hybrids were evaluated to determine the magnitude of heterosis in floral traits and fruit size. Highly significant differences were observed among the genotypes in all the traits studied. Highly significant heteroses were found for flower length which ranged from 2.7 to 13.4% and 7.2 to 21.9%, style length 2.6 to 14.5% and 6.8 to 43%, fruit length 1.9 to 5.1% and 4.6 to 27.4% over the better and mid parents, respectively. Similarly, a significant positive heterosis was recorded for ovary area which ranged from 1.2 to 6.2%, ovary perimeter 1.6 to 6.2%, ovary length 4.8 to 15.3%, fruit diameter 5.7 to 6.5% and number of fruits per plant 14.56 to 55.195% over mid parents only.Key words: Heterosis, floral traits, modified three way cross, tomato, Solanum sp