Kenaf

An experiment to study adaptability and stability of introduced kenaf (Hibiscus cannabinus) cultivars for fiber yield was undertaken at different environments of Ethiopia in the 2011 main cropping season. Seven kenaf commercial cultivars introduced from Israeli and USA along with one local check were grown in randomized complete block design with four replicates. The combined analysis of variance over environments showed kenaf fiber yield was significantly affected by environments (E), genotypes (G) and genotype x environment (GE) interactions. The first two principal components (PC1 and PC2) of the GGE explained 88.3% of the sum of squares using environment standardized model. GG-2 from Israeli and the local check had the highest mean fiber yield in that order. However, the local check was relatively most unstable compared with the rest of the genotypes. GG-2 showed both highest kenaf fiber mean yield and stability performance and also was the winner in four of the five test environments. Hence, it could be considered as most adaptable and stable cultivar. Test environments, Pawe and Awassa were the most discriminating of the genotypes and representative of all other test environments.

IOP Conference Series: Earth and Environmental Science, 2020

Stability and adaptability analysis is a very important tool for breeders to find out the potentiality of a genotype in various environments. Twenty kenaf genotypes were evaluated in 6 locations, namely Asembagus (Situbondo Regency), Muktiharjo (Pati Regency), Sumberrejo (Bojonegoro Regency), Laren (Lamongan Regency), Wanareja (Cilacap Regency), and Sukolilo (Pati Regency). For Asembagus, Muktiharjo, and Sumberrejo testing was carried out in 2013 for 2 seasons, namely longday and shortday period, while testing in Laren, Wanareja, and Sukolilo carried out in 2014 for one season on a longday period. The study is to determine the effect of the environment on the fiber yield of kenaf genotypes and their adaptation in various environments. The results of variance analysis showed that genotypes, environment, and genotype by environment interactions had a very significant effect on the fiber yield of kenaf. The average fiber yield of kenaf ranges from 0.846 to 3.758 tons per ha. Regression coefficients and mean square of deviation from regressions differ from each other indicating that there are variations in stability and adaptability between genotypes tested.

The study was conducted to investigate the genetic basis of kenaf fiber yield and quality. Two sets of generations derived from 1X51 x Ghana07 and Gregg x Ghana07 crosses. Analysis of generation means using weighted least squares procedure was performed on stalk dry weight, bast percentage, days to flowering, plant height, and basal stalk diameter. Analysis of generation means revealed that bast percentage was mainly controlled by dominance effects whereas stalk dry weight was mainly controlled by additive effects. Estimates of heterosis based on mid-parental values were generally high and ranged from 10 to 55% for stalk dry weight and bast percentage. Estimates of inbreeding depression, calculated from F 1 and F 2 generation means, were 55% for stalk dry weight in Population 1 and 1.43% in Population 2. Estimates of inbreeding depression for bast percentage were 5% in Population 1 and 15% in Population 2. The results of this study indicated that, the portion of phenotypic variation...

Genotype x environment interaction and stability analysis for growth and yield performances of kenaf (Hibiscus cannabinus L.) were carried out by growing ten varieties of kenaf (a newly developed kenaf variety; Ife Ken DI 400 alongside with other two improved varieties developed in Nigeria, two exotic improved varieties, four lines and one local). The trials were conducted in the three research stations of the Institute of Agricultural Research and Training, Obafemi Awolowo University, Moor Plantation Ibadan. The research stations are located at Ikenne (high rain forest agro-ecology), Ibadan (transitional rain forest agro-ecology) and Ilora (derive savanna agro-ecology) in 2007 and 2008. Combined analysis of variance showed that there were significant (P < 0.05) differences among the cultivars, locations, cultivar x year and year x location interactions for the traits investigated. Influence of year and cultivar x location and cultivar x location x year were not significant. There were significant differences in plant height, basal diameter, fiber yield and core yield among the cultivars, significant differences among locations in fiber yield and core yield and there were significant cultivar x year and year x location interactions for fiber yield and core yield. For stability analysis, the most stable cultivars in fiber yield and core yield were the improved varieties. For the fiber yield and core yield the most stable variety among the improved varieties was Ife Ken DI 400, followed by Ife Ken 400 and Ife Ken 100, while the fourth ranked stabled variety was Cuba 108. The most unstable improved variety was Tainung-1. Among the lines, AC 313-293 was most stable; it ranked seventh, while G 45-2 was regarded as most unstable cultivar followed by Local 35 and 2QQ 17 4 that ranked eighth, ninth and tenth respectively.

International Journal of Agricultural Technology, 2024

Significant variation of Kenaf (Hibiscus Cannabinus L.) was found to be genotypes, environments and genotype × environment existed in flowering, plant height, stem diameters and fibre yields. Accessions SAU75-414, GS14-52 and AEHC-3 had bast fibre yields higher than the mean value while SAU75-414 and GS14-52 had the highest core fibre yields. Accessions GS14-52, SAU75-414, AU75-452, IFEKEN DI-400, AEHC-3 and IFEKEN 400 had high quality ratios greater than 60%. Thus high fibre yielding SAU75-414, GS14-52 and AEHC-3 are promised both in agronomic performance and fibre quality. Plant height had positive significantly correlated with both types of fibre yields and e-modulus (0.721**). Tensile strength also had positive significant correlations with bast (0.534*) and core (0.606*) fibres, thus the tensile strength can be determined during the plant growth using plant height. Emodulus positively correlated with plant height, base diameter, fibres yields and tensile strength. Based on this, the tensile strength and e-modulus corroborate as versatile selection tools. Accessions SAU75-414, GS14-52 and AEHC-3 combined high fibre yield with high bast fibre and yarn quality. In view of the properties, they are recommended for further experimentation for improvement on fibre yield and quality for use of the farmers and industrialists.

Industrial Crops and Products, 2009

Kenaf is an important fiber crop worldwide. It was recently introduced to South Africa as a commercial fiber crop. The aim of this study was to determine how different environments and seasons influence stalk yield. Nine kenaf cultivars from various countries were analysed in two environments, over two consecutive seasons, where one location was irrigated and the other not. Data were recorded for total fresh yield, defoliated stalk yield and dry stalk yield. Yield stability was analysed with four different statistical models. The dry stalk yield varied from 15.33 to 17.78 ton/ha. El Salvador and Tainung 2 had high dry stalk yields in the favourable environments, but Tainung 2 did not have stable yield across all trials. Everglades 41 and El Salvador were the most stable of the varieties across both environments and seasons. El Salvador was the cultivar that had the highest and most stable dry stalk yield in the two seasons and two locations in South Africa, and should perform well in commercial production.

BioMed Research International, 2022

Kenaf (Hibiscus cannabinus L.) is a natural fibre crop that can be used for a variety of purposes and has various applications in industry. Despite this, its potential has not been fully exploited because of low yields and a narrow genetic base, limiting hybrids' development. Based on this background, eight kenaf mutants and one commercial cultivar were selected and crossed in a half-diallel for general and specific combining abilities (GCA and SCA) to get the desired results done in this investigation. The 36 hybrid offspring and their parental lines were tested in the field over two environments. Diallel results based on Griffing B method 2 indicated significant differences for all characters studied except for GCA in top diameter and plant height and top diameter SCA, indicating the existence of both additive and nonadditive gene actions for the inheritance of the traits. The amplitude of GCA variation was much higher than that of SCA variation for all parameters except top diameter and node number, showing the additive gene's prevalence and the likelihood of genetic advancement through selection. In both conditions, Hayman and Jinks graphical studies demonstrated that partial dominance controlled various fibre yield component parameters such as plant height, middle diameter, stick weight, and fibre weight. On the other hand, fibre yield and the majority of physical features indicated either dominance or overdominance gene action. Plant height, base diameter, core diameter, middle diameter, fresh stem weight, and stick weight all strongly positively correlated with fibre yield. These traits also had a higher proportion of additive effects, a moderate narrow-sense heritability, and a higher baker ratio, indicating successful indirect selection for fibre yield. The parents P 1 , P 3 , and P 4 had the most dominant alleles for most of the features, while the parents P 2 , P 7 , and P 9 had the most recessive alleles. The hybrids P

Cercetari Agronomice in Moldova, 2018

Multiple models have been used to examine stability in many crops, but little of such exits for kenaf. Relationship of stability estimates of various models reveals the importance of one or more estimates for reliable predictions of cultivar behaviour and stability. This study evaluated 33 kenaf genotypes across six location for core and bast fibre yield stability using four models. Kenaf were grown in a four row plot, 5 m each, at 0.2 m within row and 0.5 m between rows in the trial laid out in randomized complete block design with three replications. Twenty plants were randomly harvested per plot at 12 weeks after planting and processed to fibres. Dry core fibre weight (CFW) and bast fibre weight (BFW) were taken. Data collected were pooled across locations and subjected to analysis of variance. Genotypes stability were estimated using Finlay-Wilkinson, Wricke's ecovalence (Wi), Kang's rank sum and superiority index models. Correlations among the weights and stability models were performed. Significant differences existed in the genotypes (G) (p< 0.01), environments (E) and G×E for CFW and BFW. Partitioning the G×E showed that genotypes linear response and deviation from the mean were significant for CFW and BFW. Significant and positive correlation existed between Finlay-Wilkinson and Kang's rank sum (0.570 ***), Wi (0.615 ***) and superiority index (0.582 ***) for CFW. Significant correlations also existed between the efficacy of Kang's rank sum and Wi (0.569 ***), and with superiority index (0.779 ***). Kang's rank sum correlated with Finlay-Wilkinson (0.345 **), while Wi model had correlation with Finlay-Wilkinson (0.538 **) and Kang's rank sum (0.318 **) for the BFW. All the models correlated with one another. Any of the models is sufficient to select stable genotypes in kenaf fibre yield breeding programmes.

Journal of Agricultural Sciences, 2019

Kenaf (Hibiscus cannabinus L.) is an economically important and multipurpose natural fibre crop with several industrial applications. However, its potentials have not been fully maximised due to poor yield and its narrow genetic base which limited the available hybrids. The low yield is attributed to high photoperiod sensitivity of most kenaf accessions because it reduces the vegetative growth. This study attempts to understand the genetic architecture of days to anthesis of kenaf towards the development of a photo-insensitive kenaf hybrid. Two early maturing Nigerian kenaf accessions: NHC (12)1 and NHC (3)2, and two late maturing accessions (NHC [9]2 and NHC 15) were crossed to generate F 1 population. The F 1 hybrid together with its parents and its reciprocals were planted in a randomised complete block experiment design with three replicates. Data were collected on days to anthesis (DTA), plant height (HAH), basal stem girth (GAH), base diameter (BDAH) and weight at harvest (WAH) for analysis. The mean squares were significant for DTA, HAH, DBAH, GAH and WAH. DTA exhibited the highest broad-sense heritability value (0.98) among other traits. The GCA: SCA ratio for DTA and BDAH signifies that the effect of non-additive genes was prevalent because it was lower than a unity while the additive gene action was predominant in HAH. The negative GCA estimates for NHC (12)1 and NHC (9)2 indicated a poor combining ability. Only NHC (3)2 x NHC (9)2 showed good specific combining ability (-5.75, 0.33, 0.85, 91.46) for DTA, GAH, BDAH and WAH respectively. NHC (12)1 x NHC (9)2, NHC (3)2 x NHC (9)2, NHC (3)2 x NHC 15, NHC (9)2 x 3NHC (3)2, NHC (9)2 x NHC 15, NHC 15 x NHC (3)2, NHC 15 x NHC (9)2 showed negative significant percent of F 1 heterosis above the mid-parent in days to anthesis and could be employed to breed photo-insensitive early maturing kenaf.

Field trials were conducted in 2003 and 2004 at the Institute of Agricultural Research and Training, Ibadan (7°38&#39;N 3° 84&#39;E), Nigeria to determine the influence of some agronomic practices on yield and profitability in kenaf bast fibre production. Three kenaf varieties, Cuba 108, Ifeken 400 and Ibadan local, were subjected to three agronomic practices in a split-plot experiment. The agronomic practices include the farmers&#39; practice where no input was used and two levels of improved management practices (IMP) where the influence of pests and soil nutrition were ameliorated. The results showed that total dry matter, fibre and core yields increased by 150 - 170%, incidence of nematode reduced by 50% and severity scores of insects attack on foliage reduced by 83% in the improved management practice (IMP). The three kenaf varieties differ significantly in their leaf biomass, reaction to nematode and foliage pests attack. In the control treatment, Ibadan local had more leaf bi...