Okra [
Abelmoschus esculentus
(L.) Moench] is a widespread traditional vegetable in Burkina Faso, whose fruits are rich in trace elements, vitamins, fiber, and mucilage. Despite favorable soil and climatic conditions, production remains low due to socio-cultural constraints and a lack of high-performing, adapted varieties. To identify okra lines with superior agromorphologique performance and potential for varietal selection, eight lines seven from Burkina Faso (V1, V2, V3, V4, V5, V6 and V8) and one from Mali (V7) were characterized using a randomized complete block design (RCBD) with three replications. Data were collected on nine qualitative and sixteen quantitative traits. The results showed variability in stem, fruit, and seed characteristics. Indeed, the most significant variations in phenotypic traits were observed in stem and fruit coloration, seed weight per plant, immature fruit weight, and seed yield. Lines V3, V5, V7, and V8 exhibited desirable traits, notably earliness, large leaf size, fruit coloration, a high number of seeds per fruit, high seed weight, and high yield and could be used in a hybridization program to develop okra varieties that combine a maximum of desired characteristics. Seed yield (SY) showed the highest heritability associated with the most significant genetic gain. This combination indicates strong additive gene action, suggesting that direct selection of the best lines based on field performance will allow for rapid and significant improvement in okra productivity.
Hamadoun Sidibé, Brahime Tingueri, V. Kabre et al.· International Journal of App...· 0 citations
Rice yellow mottle virus (RYMV) is one of the most destructive viral diseases limiting rice production in Africa. Identifying genotypes that combine resistance with superior agronomic performance is essential for developing improved cultivars. This study evaluated 61 aromatic rice lines and three reference genotypes differing in RYMV resistance under greenhouse conditions using healthy and mechanically inoculated plants. Agronomic and disease-related traits were analysed by two-way analysis of variance (ANOVA), principal component analysis (PCA), hierarchical clustering on principal components (HCPC), and the Multi-trait Genotype–Ideotype Distance Index (MGIDI). RYMV infection significantly affected all measured traits (P < 0.001), reducing grain yield (65.3%), above-ground biomass (23.6%), plant height (13.6%), panicle length (11.2%), panicle number (13.3%), and thousand-grain weight (16.2%), while increasing spikelet sterility by 208.0%. Significant genotype × health interactions revealed contrasting responses among genotypes. PCA explained 59.0% of the total phenotypic variation and showed that yield-related traits were negatively associated with spikelet sterility and disease severity. HCPC grouped the genotypes into four distinct clusters according to their agronomic performance and disease response. MGIDI identified ten superior genotypes (Remar2, Remar4, Remar11, Remar13, Remar28, RemarGT, K20-26, K20-Germ13, Basmati370, and the highly resistant control TOG5681) that combined high yield potential with reduced disease impact. These genotypes constitute valuable genetic resources for breeding high-yielding, RYMV-resistant aromatic rice cultivars.
Lucien Kaboré, V. Traoré, Aboubié Elisabeth Zongo et al.· Journal of Experimental Agri...· 0 citations
Onion (
Allium cepa
L.) is the second most commonly produced and consumed vegetable worldwide. In West Africa, high heat and moisture are key constraints for onion productivity during the rainy-season. This study aimed to assess the combining ability, heterosis, and genetic variability of five onion genotypes and 10 F
1
hybrids generated through a half diallel mating design to identify superior parental lines and hybrids adapted to heat and moisture conditions.
The experiment involved five parents: Prema 178, EW001, Violet d’Abéché, Violet de Galmi and AC980. The trials were implemented on station at the World Vegetable Center in Samanko by using a randomized complete block design. Twelve morphological, physiological, and agronomic traits were evaluated.
Analysis of variance showed substantial genetic variability. Significant general combining ability (GCA) and specific combining ability (SCA) effects indicated that both additive and non-additive gene actions influence key traits. The best general combiner was Parent P1 (Prema 178), which had the best positive GCA effects on plant survival rate (5 and 4.98), plant height (2.36 and 2.53), number of bulbs (5.82 and 3.38), and bulb yield (2.09 and 2.44). The hybrids P4×P5 (Violet de Galmi x AC980) and P1xP5 (Prema 178×AC980) had the most positive SCA effects and the best heterosis values over the midparent (105.26%) and better parent (94.56%) for bulb yield, as well as strong vigor and root growth.
These results demonstrate that the hybrids P4×P5, P1×P5, and P3×P5 are good candidates for multilocation testing in high heat and high moisture prone conditions.
A. Traore, J. Tignégré, Z. Kiébré et al.· Frontiers in Horticulture· 0 citations