Genetic interrelationship among quantitative traits and path analysis of some West African okra (Abelmoschus caillei) genotypes

P.M. Jonah, Y.M. Kwaga

Department of Crop Science, Adamawa State University, PMB 25, Mubi, Nigeria

(Manuscript received 5 July 2018; accepted for publication 30 November 2018)

Abstract. Thirty-six entries of a half diallel cross were evaluated at the Teaching and Research Farm, Adamawa State University, Mubi in 2012 and 2013 under rain fed conditions. The investigation was conducted to study inter-character correlations and path coefficient analyses of yield related traits in West African okra. Fresh pod yield exhibited highly significant (P≤0.01) positive correlation with pods/plant, pod length, branches/plant, pod diameter and leaves/plant. Pod length recorded a highly significant positive correlation with plant height, pod diameter, number of leaves/plant, branches/plant and pods/plant. Similarly, pod diameter had a highly significant positive correlation with plant height, number of leaves, branches and pods/plant. Furthermore, number of pods/plant and branches/plant recorded highly significant positive correlation among yield related traits except plant height. The path coefficient analysis of fresh pod yield and yield related traits showed that number of pods/plant gave the highest direct contribution and percentage yield contribution of 47.83%, followed by pod diameter which contributed 4.58%. Also the highest combined contribution of 14.43% came from pods/plant and pod diameter. Residual percentage contribution was 30.64% revealing that pod yield attributes in this study explained 69.36%. This investigation suggests that pods/plant and pod diameter can be considered as selection criteria for the improvement of West African okra genotypes.

Productivity and adaptability of new genotypes field pea (Pisum sativum L.) cultivated under environmental condition of Southern Romania

R. Sturzu*, A. M. Ene, Cr. Melucă, J. M. Cojocaru

Agricultural Research and Development Station Teleorman, Drăgănești Vlașca, 147135 Teleorman, Romania (Manuscript received 11 October 2016; accepted for publication 19 January 2017)

Abstract. The purpose of the paper was to identify new peas genotypes, created in Agricultural Research and Development Station, Teleorman, South Romania, with improved productivity and adaptability to the environmental conditions of that region. The study was carried out with 25 field pea varieties for a period of three years (2013-2015). The experiment was conducted in randomized complete blocks design in three replications. The results of variance analysis showed that there was significant difference among pea genotypes by grain yield. The average yield over three years showed that lines M 1357, M 1410, M 1418 and M 720 achieved higher yield levels compared with the control genotype Vedea and with the average yield of all tested genotypes. Yields stability was estimated by coefficient of variability. Correlation analysis showed that the strongest relations there are between productivity elements: number of pods and seeds per plant (r = 0.905), number of pods and seeds weight per plant (r = 0.655), number of seeds per plant and seeds weight (r = 0.815), plant height and first pod insertion height (r = 0.921). There are significant negative correlations between 1000 seeds weight and number of grains per plant (r = – 0.229), number of pods per plant and 1000 seeds weight (r = -0.346), the first pod insertion height and number of pods per plant (r = -0.530), and the number of grains per plant (r = -0.412). The results obtained in this study suggest that, the new field pea genotypes are suitable for spreading and cultivating in Southern Romania.

Determination of some macro and micro elements in grain of winter barley genotypes

N. Markova Ruzdik1*, Lj. Mihajlov1, V. Ilieva1, S. Ivanovska2, D. Valcheva3, B. Balabanova1, M.Ilievski1

1Faculty of Agriculture, “Goce Delchev” University, 2000 Shtip, Republic of Macedonia
2Faculty of Agricultural Sciences and Food, “Ss. Cyril and Methodius” University, 1000 Skopje, Republic of Macedonia 3Institute of Agriculture, 8400 Karnobat, Republic of Bulgaria

(Manuscript received 27 January 2016; accepted for publication 1 March 2016)

Abstract. The objective of this study was to determine the content of some macro and micro elements in grain of winter barley genotypes, as well as, to identify the relationships between those elements and grain yield. The experiment was carried out during the period of 2012/2013 and 2013/2014 on the research fields of the Faculty of Agriculture, “Goce Delchev” – University, in two locations in the Republic of Macedonia, Ovche Pole and Strumica. The total 21 genotypes were used as an experimental material, of which 5 were Macedonian, 2 were Croatian, 2 were Serbian and 12 genotypes originate from Bulgaria. The trial was arranged as randomized complete block design with three replications for each genotype and location. Microwave digestion method was used to destroy the organic matrix to determine the content of Na, Mg, P, Ca, Fe, Cu and Zn. The content of all elements was carried out by mass spectrometry with inductively coupled plasma (ICP-MS). During the period of study, the concentration of all examined elements was higher in genotypes grown in Strumica locality compare to Ovche Pole. In both locations, for all analyzed properties were found significant differences between examined barley genotypes. In Ovche Pole locality, the genotype Line 2 was the richer with macro and micro elements, while in Strumica locality the genotypes Izvor and NS 565 2R. Generally in both locations, barley genotypes were poor with macro and micro elements. In both locations, was not found significant correlation between content of macro and micro elements and grain yield. Using PCA analysis, two main components were extracted for the study conducted in Ovche Pole and three components in Strumica locality.

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Application of path coefficient analysis in assessing the relationship between growth-related traits in indigenous Nigerian sheep (Ovis aries) of Niger State, Nigeria

S. Egena*, D. Tsado, P. Kolo, A. Banjo, M. Adisa-Shehu-Adisa

Department of Animal Production, Federal University of Technology, P.M.B 65, Minna, Niger State, Nigeria

Abstract. Indigenous Nigerian sheep raised under extensive management were evaluated with the aim of assessing variability among body weight and body measurement traits thereby deducing components that best describe the relationship using path coefficient analysis. The parameters measured were body weight (BW), body length (BL), head length (HL), head width (HW), height at withers (HAW), chest depth (CD), chest girth (CG) and shin circumference (SC). Pair wise correlation between body weight and body measurements were positive and significant (r = 0.475 – 0.655 in males, 0.262 – 0.449 in females, and 0.336 – 0.509 in the combined population, P<0.01). Path analysis showed that shin circumference and chest depth had the greatest direct effect on body weight in male, female and the combined population (path coefficient = 0.250, 0.252 and 0.250, respectively) while the least direct effect was observed for head width (in male and female with path coefficient = 0.007 and -0.017, respectively), and height at withers in the combined population (path coefficient = -0.020). Percentage direct contribution to body weight was 6.25, 6.35 and 6.25% from shin circumference (male), chest depth (in female and the combined population respectively). The optimum linear regression models with coefficient of determination (R2) value of 0.45, 0.31 and 0.37 included forecast indices such as chest depth and shin circumference in males, body length, head length and chest depth in females and the combined population, respectively.

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Correlation between qualitative-technological traits and grain yield in two-row barley varieties

N. Markova Ruzdik1*, D.Valcheva2, D.Vulchev2, Lj. Mihajlov1, I. Karov1, V. Ilieva1

1Faculty of Agriculture, “Goce Delchev” University, 2000 Shtip, Republic of Macedonia 2Institute of Agriculture, 8400 Karnobat, Bulgaria

Abstract. The aim of this paper was to determine the correlation between qualitative-technological traits and grain yield, as well as, the variability of these properties in two-row barley varieties. The experiment was conducted during the period of 2012/2013 and 2013/2014 on the research fields of the Faculty of Agriculture, in two different locations in the Republic of Macedonia, Ovche Pole and Strumica. The total numbers of 21 genotypes were used as research material, of which 5 were Macedonian, 2 were Croatian, 2 were Serbian and 12 genotypes originate from Bulgaria. The following qualitative-technological traits were analyzed: protein content, uniformity of I class grains, weight of 1 000 grains, hectoliter mass, water sensitivity and soaking degree. In both experimental years, the average values for grain yield for tested genotypes in Strumica location were higher, compared with genotypes examined in Ovche Pole location. In both locations significant and positive correlation was established between the grain yield and weight of 1 000 grains. Using the principle component analysis, it was determined that as far as qualitative traits and grain yield were concerned, two main components with cumulative percent of variation of 69.63% were identified for genotypes analyzed in Ovche Pole. Also for tested genotypes grown in Strumica were obtained two main components with cumulative percent of variation of 59.75%. The most suitable for growing in Ovche Pole location were the genotypes: Perun, Lardeya, Asparuh, Sajra and Odisej and for Strumica location genotypes: Hit, Line 1, Lardeya, Kuber, Sajra and Devinija.

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Correlation between grain yield and yield components in winter barley varieties

N. Markova Ruzdik1*, D.Valcheva2, D.Vulchev2, Lj. Mihajlov1, I. Karov1, V. Ilieva1

1Faculty of Agriculture, “Goce Delchev” University, 2000 Stip, Macedonia 2Institute of Agriculture, 8400 Karnobat, Bulgaria

Abstract. The objective of this study was to determine the correlation between yield and its components and their direct and indirect effects on grain yield in two-row winter barley varieties. The experimental work was conducted during the period of 2012-2014 on the research fields of the Faculty of Agriculture, in two different areas in the Republic of Macedonia, Ovche Pole and Strumica. As far as material is concerned, 21 genotypes were used with Macedonian, Serbian, Croatian and Bulgarian origin. Significant and positive coefficient of correlations were obtained between grain yield and number of spike per m2, number of productive tillers per plant and grain weight per plant, number of grain per spike and grain weight per spike, grain weight per spike and 1000 grains weight in both localities. The highest direct effect to grain yield was obtained by number of spikes per m2 in both localities. Therefore, this trait can be used as a criterion in breeding to improve the yield of barley varieties.

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Correlations between grain yield and yield related traits in barley mutant lines

B. Dyulgerova

Abstract. The present study was undertaken with the objective to determine the association between yield and its component characters and their direct and indirect effects on grain yield in winter barley (Hordeum vulgare L.) mutant lines. The study was conducted at the Institute of Agriculture, Karnobat, during the period 2009–2011 and included 19 lines, developed by mutant treatment with sodium azide of cultivar Veslets. Phenotypic correlations of grain yield were highly significant and positive with number of grains in spike, weight of grains in a spike and weight of grains in a plant. The maximum direct contribution to grain yield was made by weight of grains in a plant and number of grains in spike. Therefore, these traits can be used as selection criteria to high-yielding winter feed barley mutants.

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Correlation between soil characteristics and zinc content in the aboveground biomass of Virginia tobacco

L. Dospatliev

Abstract. The study was conducted on alluvial-meadow, maroon-forest soils and vertisols with Virginia tobacco. The total content of zinc is measured through decomposition by HF, HClO , and HNO acids. A solution of 0.005 M diethylentriaminepentaacetic acid + 0.1 M triethanolamine, pH 7.3 was used for extraction 4 3 of the elements’ mobile forms from soils. The preparation of plant samples was made by means of dry ashing and dissolution in 3 M HCl. An atomic absorption spectrometer “Spektra AA 220” of the Australian company Varian was used for determination of Zn content in the soil and plant samples. Certified reference materials (three soils and tobacco leaves) were also analyzed for the verification of the accuracy of Zn determination.A correlation/regression analysis was conducted between pH, humus content, total and mobile forms of zinc in the soil, and the concentration of these elements in the aboveground biomass of Virginia tobacco. It was established that there are no statistically significant dependencies determined between soil pH, humus content and zinc concentration in the plant organs of Virginia tobacco. Regressional dependencies of great significance were determined between the total and mobile zinc in the soil, and the element concentration in the leaves of the three harvesting zones.

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