scholarly journals Prediction of expected genetic gain in progeny test of Samama [Anthocephalus macrophyllus (Roxb.) Havil.] in West Seram District, Maluku Province, Indonesia

2021 ◽  
Vol 2 (1) ◽  
pp. 25-32
Author(s):  
Ambar Dwi Suseno ◽  
Yossa Istiadi ◽  
Sata Yoshida Srie Rahayu

The research objective is to find out genetic variation, estimated heritability value and the expected genetic gain of Samama [Anthocephalus macrophyllus (Roxb.) Havil.] on variation in  stem diameter and plant height as superior seed producers. The research was conducted in Uraur Village, West Seram Regency, Maluku Province. The trials consisted of 80 families. All of the trials were laid out in randomized complete block designs (RCBD), 4-trees plots with 4 replications (blocks) at spacing of 5m×2m. Data collection was carried out for 2 months (February to March 2020) and was focused on observing growth variations and genetic parameters in the progeny trial block at 4 years of age including plant height and diameter at breast height. The results of this study indicate that there are variations in growth, where the Anova test results show very significant differences in the plant height parameters namely Family (F = 3.417 p 0.01), Block (F = 437.465 p 0.01) and Family and Block Interactions (F = 3.351 p 0.01). The stem diameter parameters also showed very significant differences, namely Family (F = 2.785 p 0.01), Block (F = 353.095 p 0.01) and Family and Block Interaction (F = 2.611 p 0.01). The value of family heritability and individual heritability on plant height characters belonged to a high category with a family heritability value of 0.7213 and individual heritability value of 0.8811, while the stem diameter character for individual heritability was high with a value of 0.4406 but family heritability was moderate with value of 0.5204. The value of genetic correlation was high and positive and generally shows a greater value than the phenotypic correlation. Genetic correlation values ranged from 0.967 while phenotypic correlation values ranged from 0.8944. The highest selection priority was found in the height of the stem with a weight constant of 0.239. Predicted expected genetic gain was 3.0% for diameter parameter and 3.2% for height parameter.Objektif dari penelitian ini adalah menemukan variasi genetik, taksiran nilai heritabilitas serta peluang perolehan expected genetic gain tanaman Samama [Anthocephalus macrophyllus (Roxb.) Havil.] pada variasi diameter dan tinggi pohon sebagai penghasil benih unggul.  Penelitian dilakukan di Desa Uraur Kabupaten Seram Bagian Barat Provinsi Maluku. Percobaan ini menggunakan 80 famili. Penelitian ini dibangun dengan desain randomized completely block design (RCBD), jarak tanam 5 x 2 m, 4 ulangan (blok) dan 4 treesplot. Pengumpulan data dilakukan selama 2 bulan (Februari sampai dengan bulan Maret 2020) memfokuskan pada pengamatan variasi pertumbuhan dan parameter genetik yang berada di blok uji keturunan pada umur 4 tahun meliputi tinggi dan diameter setinggi dada. Hasil Penelitian ini menunjukkan bahwa terdapat variasi pertumbuhan, dimana dari hasil uji Anova menunjukkan perbedaan sangat nyata pada parameter tinggi yaitu Famili (F=3,417 p0,01), Blok (F=437,465 p0,01) dan Interaksi Famili dan Blok (F=3,351 p0,01). Pada parameter diameter juga menunjukkan perbedaan sangat nyata yaitu Famili (F=2,785 p0,01), Blok (F=353,095 p0,01) dan Interaksi Famili dan Blok (F=2,611 p0,01). Nilai heritabilitas famili dan heritabilitas individu pada karakter tinggi tanaman memiliki kategori tinggi dengan nilai heritabilitas famili 0,7213 dan nilai heritabilitas individu 0,8811, sedangkan pada karakter diameter tanaman untuk heritabilitas individu tergolong tinggi dengan nilai sebesar 0,4406 namun heritabilitas famili tergolong sedang dengan nilai 0,5204. Nilai korelasi genetik bernilai tinggi dan positif serta secara umum menunjukkan nilai yang lebih besar dibandingkan dengan korelasi fenotipik. Nilai korelasi genetik berkisar 0,967 sedangkan nilai korelasi fenotipiknya berkisar 0,8944. Prioritas seleksi tertinggi ditemukan pada tinggi batang dengan nilai konstanta bobot sebesar 0,239. Prediksi expected genetic gain diperoleh 3,0 % untuk parameter diameter dan 3,2 % untuk parameter tinggi. 

2017 ◽  
Vol 52 (12) ◽  
pp. 1167-1177 ◽  
Author(s):  
Tamiris Pereira da Silva ◽  
Francisco das Chagas Vidal Neto ◽  
Júlio César Do Vale

Abstract: The objective of this work was to predict the genetic gains with selection of superior individuals within papaya (Carica papaya) progenies using the REML/Blup analysis. Thirty-six S2 progenies, originated from the Calimosa and Tainung 1 hybrids, and two commercial control checks were evaluated in a randomized complete block design, with four replicates. The following traits were evaluated: heights of plants and first fruit; stem diameter at 12 and 18 months; number of days required for fruiting; number, mass, and average mass of commercial fruit; and number and mass of carpelloid and pentandric fruit. The magnitudes of the genetic parameters indicated that the variability present in most of the characters allows greater genetic gain if the selection is made at the progeny level, and not in individual plants. For selection among progenies, PROT-268, PROT-74, PROT-55, and PROT-22 were the most promising, with the greatest genetic gain for the studied characters. In the selection among and within progenies, the prediction of the gains is higher for the increase in the expression of the number of commercial fruit and for the decrease in the expression of pentandric fruit.


Jurnal Wasian ◽  
2015 ◽  
Vol 2 (2) ◽  
pp. 79
Author(s):  
Prastyono Prastyono ◽  
Mudji Susanto

The estimation of genetic parameters for stem diameter and plant height of ironwood (Eusideroxylon zwageri T. et B.) was conducted in a progeny trial in Bondowoso, East Java at the age of 5,5 years. The trial was arranged in an incomplete block design, which comprised of 49 families from three provenances (Batanghari, Berau and Kutai Kertanegara) with 4 replications and single tree plot. Families of Batanghari provenance showed the best growth of stem diameter and plant height compared with another provenance. There was significant difference in plant height between families within provenance, whereas stem diameter was not significantly different both of between provenance as well as between families within one provenance. Non-genetic or environmental factors provide considerable influence on plant growth in the progeny test of ironwood until the age of 5.5 years; it was indicated by the residual variance component. Individual heritability for plant height was considered as high (0.37) and stem diameter was considered as moderate (0.26). There was a strong genetic correlation between the stem diameter and plant height (0.95). This information is very important for future genetic improvement of ironwood.


2020 ◽  
Vol 15 (1) ◽  
pp. 9 ◽  
Author(s):  
BUDI MARTONO

<p>ABSTRAK</p><p>Fusi protoplas merupakan salah satu alternatif yang dapat dilakukanuntuk meningkatkan keragaman genetik pada tanaman nilam. Pendugaanparameter genetik nilam hasil fusi protoplas nilam Jawa (Girilaya) dengannilam Aceh (Sidikalang dan TT 75) adalah penting dalam programpemuliaan. Penelitian ini bertujuan untuk mengetahui keragaman genetik,heritabilitas, korelasi fenotipik dan genotipik beberapa karakter kuantitatifhibrida somatik nilam hasil fusi protoplas. Penelitian dilakukan di KP.Cimanggu Balittro dari bulan Juli-Desember 2004. Rancangan percobaanyang digunakan adalah rancangan acak kelompok dengan 33 genotipeyang terdiri dari 3 tetua dan 30 klon hibrida somatik sebagai perlakuan dandiulang dua kali. Hasil penelitian menunjukkan bahwa jumlah cabangprimer, jumlah daun per cabang primer dan tebal daun mempunyaikeragaman genetik yang sempit, sedangkan tinggi tanaman, panjangcabang primer, jumlah dan panjang cabang sekunder, panjang dan lebardaun, panjang tangkai daun, produksi terna basah dan kering keragamangenetiknya luas. Heritabilitas tinggi tanaman, panjang cabang primer,panjang cabang sekunder, panjang dan lebar daun, panjang tangkai daun,produksi terna basah dan kering bernilai tinggi. Sedangkan karakter jumlahcabang primer, jumlah cabang sekunder, jumlah daun per cabang primerdan tebal daun bernilai heritabilitas rendah sampai sedang. Sebagian besarkarakter yang diamati memiliki keragaman genetik luas dan heritabilitastinggi, kecuali jumlah cabang primer, jumlah daun per cabang primer dantebal daun. Korelasi fenotipik dan genotipik positif dan nyata terhadapproduksi terna kering ditunjukkan oleh karakter tinggi tanaman, jumlahcabang primer, panjang cabang sekunder, panjang dan lebar daun, panjangtangkai daun serta produksi terna basah.</p><p>Kata kunci: Pogostemon sp., fusi protoplas, parameter genetik</p><p>ABSTRACTGenetic variability, heritability, and correlation among quantitativecharacters of patchouli (Pogostemon sp.) derived from protoplastfussionProtoplast fussion is one of the alternatives for increasing geneticvariability of patchouli. Study to estimate genetic parameters of somatichybrids of Pogostemon heyneaneus (cv. Girilaya) x P. cablin (cv.Sidikalang and TT 75) is important in breeding program. Study on geneticvariability, heritability, phenotypic and genetic correlation for somequantitative characters of somatic hybrids of patchouli derived fromprotoplast fussion was conducted in Cimanggu Experimental Garden fromJuly to December 2004. The experiment was arranged in a randomizedcomplete block design with two replications using 33 genotypes consistingof three parents and 30 somatic hybrids as treatments. Results of thisexperiment showed that number of primary branches, number of leaves onprimary branches, and thickness of leaves indicated narrow geneticvariability, while plant height, length of primary branches, number andlength of secondary branches, length and width of leaves, leaf petiolelength, fresh and dry leaves production indicated wide genetic variability.Plant height, length of primary branches, number and length of secondarybranches, length and width of leaves, leaf petioles length, fresh and dryleaves production showed high heritability values. Meanwhile, thecharacters of number of primary and secondary branches, number ofleaves on primary branches and thick of leaves showed moderate to lowheritability values. Most characters observed showed wide geneticvariability and high heritability, except for number of primary branches,number of leaves on primary branches, and thick of leaf. Phenotypic andgenotypic correlations between plant height, number of primary branches,length of secondary branches, length and width of leaves, leaf petiolelength and fresh leaves production with dry leaves production werepositive and significant.</p><p>Key words: Pogostemon sp., protoplast fussion, genetic parameters</p>


Genetics ◽  
1996 ◽  
Vol 143 (3) ◽  
pp. 1409-1416 ◽  
Author(s):  
Kenneth R Koots ◽  
John P Gibson

Abstract A data set of 1572 heritability estimates and 1015 pairs of genetic and phenotypic correlation estimates, constructed from a survey of published beef cattle genetic parameter estimates, provided a rare opportunity to study realized sampling variances of genetic parameter estimates. The distribution of both heritability estimates and genetic correlation estimates, when plotted against estimated accuracy, was consistent with random error variance being some three times the sampling variance predicted from standard formulae. This result was consistent with the observation that the variance of estimates of heritabilities and genetic correlations between populations were about four times the predicted sampling variance, suggesting few real differences in genetic parameters between populations. Except where there was a strong biological or statistical expectation of a difference, there was little evidence for differences between genetic and phenotypic correlations for most trait combinations or for differences in genetic correlations between populations. These results suggest that, even for controlled populations, estimating genetic parameters specific to a given population is less useful than commonly believed. A serendipitous discovery was that, in the standard formula for theoretical standard error of a genetic correlation estimate, the heritabilities refer to the estimated values and not, as seems generally assumed, the true population values.


1982 ◽  
Vol 62 (3) ◽  
pp. 665-670 ◽  
Author(s):  
D. C. JEFFRIES ◽  
R. G. PETERSON

Genetic parameters were estimated for 2403 purebred Yorkshire pigs over a 2-yr period, representing 21 sires. The traits studied included average daily gain, age adjusted to 90 kg, ultrasonic measurements of backfat at the mid-back and loin positions, total and adjusted total ultrasonic backfat and corresponding carcass backfat measurements. Least squares analyses were used to estimate and adjust for the effects of sex, year-season and sex by year-season interaction. Heritabilities and genetic correlations were calculated for all traits using both half- and full-sib estimates. Adjusted age and adjusted total ultrasonic backfat measurements were found to have the highest heritabilities of the live traits in this study. Estimates of heritability for adjusted age and adjusted total ultrasonic backfat were 0.24 ± 0.10 and 0.26 ± 0.10 based on half-sib and 0.56 ± 0.07 and 0.41 ± 0.06 from full-sib analyses. The genetic correlation between these two traits was −0.07 ± 0.28 based on the half-sib method. The total phenotypic correlation was −0.01 ± 0.02. Key words: Swine, ultrasonic backfat, heritabilities, genetic correlations


2013 ◽  
Vol 48 (4) ◽  
pp. 411-416 ◽  
Author(s):  
Cecília Khusala Verardi ◽  
Erivaldo José Scaloppi Junior ◽  
Guilherme Augusto Peres Silva ◽  
Lígia Regina Lima Gouvêa ◽  
Paulo de Souza Gonçalves

The objective of this work was to assess the genetic parameters and to estimate genetic gains in young rubber tree progenies. The experiments were carried out during three years, in a randomized block design, with six replicates and ten plants per plot, in three representative Hevea crop regions of the state of São Paulo, Brazil. Twenty-two progenies were evaluated, from three to five years old, for rubber yield and annual girth growth. Genetic gain was estimated with the multi-effect index (MEI). Selection by progenies means provided greater estimated genetic gain than selection based on individuals, since heritability values of progeny means were greater than the ones of individual heritability, for both evaluated variables, in all the assessment years. The selection of the three best progenies for rubber yield provided a selection gain of 1.28 g per plant. The genetic gains estimated with MEI using data from early assessments (from 3 to 5-year-old) were generally high for annual girth growth and rubber yield. The high genetic gains for annual girth growth in the first year of assessment indicate that progenies can be selected at the beginning of the breeding program. Population effective size was consistent with the three progenies selected, showing that they were not related and that the population genetic variability is ensured. Early selection with the genetic gains estimated by MEI can be made on rubber tree progenies.


2014 ◽  
Vol 36 (3) ◽  
pp. 693-703 ◽  
Author(s):  
Rodinei Facco Pegoraro ◽  
Bruna Aparecida Madureira de Souza ◽  
Victor Martins Maia ◽  
Uirá do Amaral ◽  
Marlon Cristian Toledo Pereira

This study aimed to evaluate the growth characteristics of irrigated Vitória pineapple plants grown in semi-arid conditions and determine its developmental stages based on those characteristics. It was used a randomized block design with four replicates. The experimental treatments were: plant harvest at 270, 330, 390, 450, 510, 570, 690, 750, and 810 days after planting (DAP). The following variables were determined: plant height, stem diameter, D-leaf length, D-leaf fresh and dry mass, biomass production of plants and plant parts (organs), and vegetative biomass. Five phenological stages are proposed based on vegetative biomass production: < 20% biomass production (V1); 21-40% (V2); 41-60% (V3); 61-80% (V4); and > 80% (V5). The maximum growth rate for plant height, D-leaf length, and stem diameter was observed at the end of the phenological stage V1 (390-411 DAP), and at the end of stage V5 these plant traits had average values of 106, 82, and 7 cm, respectively. The maximum biomass accumulation rates were observed at stages V4 and V5, resulting in a final fruit yield and total fresh biomass of 72 t ha-1 and 326 t ha-1, respectively. Finally, we estimated that 80% of the accumulated biomass may remain in the field after fruit and slip harvest, and could be incorporated as plant residue into the soil.


Irriga ◽  
2020 ◽  
Vol 25 (2) ◽  
pp. 223-233
Author(s):  
Jardel Henrique Kirchner ◽  
Adroaldo Dias Robaina ◽  
Marcia Xavier Peiter ◽  
Rogério Ricalde Torres ◽  
Wellington Mezzomo ◽  
...  

ALTURA DE PLANTAS E DIÂMETRO DE COLMOS DE SORGO FORRAGEIRO IRRIGADO EM FUNÇÃO DE CORTES     JARDEL HENRIQUE KIRCHNER1; ADROALDO DIAS ROBAINA2; MARCIA XAVIER PEITER3; ROGÉRIO RICALDE TORRES4; WELLINGTON MEZZOMO5 E RICARDO BENETTI ROSSO6   1 Eng. Agrônomo, Doutor, Professor do Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Sul, Rua Nelsi Ribas Fritsch, nº 1111, bairro Esperança, Ibirubá, RS, Brasil, CEP: 98200-000, [email protected]. 2  Eng. Agrônomo, Doutor, Professor Titular do Departamento de Engenharia Rural, UFSM, Avenida Roraima, nº 1000, bairro Camobi, Santa Maria, RS, Brasil, CEP: 97195-000, [email protected]. 3 Eng. Agrônoma, Doutora, Professora Associada do Departamento de Engenharia Rural, UFSM, Avenida Roraima, nº 1000, bairro Camobi, Santa Maria, RS, Brasil, CEP: 97195-000, [email protected]. 4 Eng. Agrônomo, Doutor, Professor do Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Sul, Rua Eng. João Viterbo de Oliveira, nº 3061, Zona Rural, Vacaria, RS, Brasil, CEP: 95219-899, [email protected]. 5 Eng. Agrônomo, Mestre, Doutorando no Programa de Pós-Graduação em Engenharia Agrícola, UFSM, Avenida Roraima, nº 1000, bairro Camobi, Santa Maria, RS, Brasil, CEP: 97195-000, [email protected]. 6 Eng. Agrônomo, Doutor, Professor no Instituto Federal Catarinense, Rodovia SC 283 - km 17, Concórdia, SC, Brasil, CEP: 89703-720, ricardo.rosso @ifc.edu.br.      1 RESUMO   A obtenção de elevadas produtividades de pastagens é essencial para a manutenção dos níveis alimentares de rebanhos bovinos. A altura de plantas e o diâmetro de colmos caracterizam-se como determinantes no sucesso produtivo da pastagem pela quantidade de massa produzida. Um dos fatores que alteram esses índices são as precipitações irregulares, tornando necessária a reposição da demanda através da irrigação. O objetivo do trabalho foi avaliar o diâmetro de colmos e a altura de plantas sob diferentes condições hídricas e cortes no sorgo forrageiro, em dois anos agrícolas no estado do Rio Grande do Sul. Foram conduzidos dois experimentos nos anos agrícolas de 2015/2016 e 2016/2017 em Santa Maria (RS), e foram avaliadas as alturas de plantas e os diâmetros de colmos em seis condições hídricas (não irrigado, 25, 50, 75, 100 e 125 % da ETo), em três períodos de cortes (50, 80 e 110 dias após a semeadura) em delineamento blocos ao acaso. Foram encontradas diferenças estatisticamente significativas para a variação da altura de plantas e também do diâmetro de colmos, tanto conforme a lâmina de irrigação, quanto na sequência de cortes.   Palavras chave: pastagem irrigada, capacidade de rebrote, irrigação.     KIRCHNER, J. H.; ROBAINA, A. D.; PEITER, M. X.; TORRES, R. R.; MEZZOMO, W.; ROSSO, R. B. HEIGHT OF PLANTS AND DIAMETER OF STEMS OF SORGHUM FORAGE IRRIGATED BY CUTS         2 ABSTRACT   Achieving high pasture yields is essential for maintaining feed levels in cattle herds. Plant height and stem diameter are determinants of pasture production success by the amount of mass produced. One of the factors that change these rates is irregular rainfall, making it necessary to replenish demand through irrigation. The objective of this work was to evaluate stem diameter and plant height under different water conditions and forage sorghum cuts in two agricultural years in the state of Rio Grande do Sul. Two experiments were conducted in the agricultural years of 2015/2016 and 2016/2017 in Santa Maria / RS, and plant heights and stem diameters were evaluated in six water conditions (non-irrigated, 25, 50, 75, 100 and 125% of ETo), in three cutting periods (50, 80 and 110 days after sowing) in a randomized block design. Statistically significant differences were found for plant height and stem diameter variation, both according to irrigation depth and cut sequence.   Keywords: irrigated pasture, regrowth capacity, irrigation.


2020 ◽  
Vol 4 (1) ◽  
pp. 108-117
Author(s):  
Rahmat Fitra Yandi Nasution ◽  
Syamsuddin Syamsuddin ◽  
Syafruddin Syafruddin

Abstrak. Penelitian ini bertujuan untuk mengetahui pengaruh jenis mikoriza, varietas dan interaksi jenis mikoriza dan varietas terhadap pertumbuhan dan hasil tanaman cabai pada tanah Incepticol. Penelitian ini dilaksanakan di Kebun Percobaan Iesuum Krueng Raya Aceh Besar, Rumah Kaca dan Laboratorium Fisiologi Tumbuhan Fakultas Pertanian Universitas Syiah Kuala Darussalam Banda Aceh dari bulan Mei sampai September 2018. Analisis data yang digunakan dalam penelitian ini adalah Rancangan Acak Kelompok (RAK) pola faktorial 3 x 2 dengan 3 ulangan. Faktor yang diamati dalam penelitian ini adalah jenis mikoriza dan varietas. Jenis mikoriza yang digunakan adalah Glomus mosseae, Gigaspora sp dan Campuran serta varietas yang digunakan adalah varietas Lado F1 dan Perintis. Hasil penelitian ini menunjukan jenis mikoriza berpengaruh nyata pada tinggi tanaman 30 dan 45 HSTdan jumlah cabang produktif. Jenis mikoriza terbaik terdapat pada jenis mikoriza campuran (Glomus mosseae dan Gigaspora sp). Pada varietas berpengaruh sangat nyata terhadap tinggi tanaman 15,30 dan 45 HST, diameter batang 30 dan 40 HST dan jumlah cabang produktif serta berpengaruh nyata pada diameter batang 45 HST. Jenis varietas terbaik terdapat pada varietas Lado. Interaksi antara jenis mikoriza dan jenis varietas berpengaruh sangat nyata terhadap tinggi tanaman 30 HST dan jumlah cabang produktif serta berpengaruh nyata pada diameter batang 30 HST.Interaksi antara jenis mikoriza dan varietas terbaik tedapat pada jenis mikoriza campuran (Glomus mosseae dan Gigaspora sp) dengan varietas Lado F1.The Effect of Mycorrhizal Types on the Growth of Some Chili Varieties in Incepticol Soil Krueng Raya Aceh BesarAbstract. This research aims to determine the effect of type of mycorrhiza, varieties, and interactions of mycorrhiza and varieties types on the growth and yield of chili plants on the Inceptisol land. This research was carried out at the Krueng Raya Iesuum Experimental Garden in Aceh Besar, greenhouse and laboratory of plant physiology, Faculty of Agriculture of Syiah Kuala University, Darussalam, Banda Aceh from Mei to September 2018. The analysis of data used in this study was Randomized Block Design -Factorial 3x2 with 3 replications. The factors observed in this research were the type of mycorrhiza and varieties. Types of mycorrhiza used are Glomus mosseae, Gigaspora, and the combination. Varieties used are Lado F1 and Perintis. The result of this research showed that types of mycorrhiza take effect significantly on plant height 30 dan 45 DAP and productive branch numbers. The mixed of mycorrhiza gives the best result on growth and yield of chili plant. The varieties of chili plants highly significant take effect on plant height 15, 30 and 45 DAP, stem diameter 30 and 40 HST and productive branch numbers and significantly affect on stem diameter 45 DAP. Lado F1 gives the best result on growth and yield. The interactions of mycorrhiza and varieties type highly significant take effect on plant height 30 HST and productive branch number and significantly take effect on stem diameter 30 HST. The combination of mixed mycorrhiza and Lado F1 treatment gives the best result on growth and yield of chili plants. 


2019 ◽  
Vol 1 (2) ◽  
pp. 63-69
Author(s):  
Shabir Hussain ◽  
Hakoomat Ali ◽  
Muhammad Ehmer ◽  
Waqas Ahmad

The research was conducted at Research Area of Department of Agronomy, Bahauddin Zakariya University Multan, during the spring season, 2016. The study aimed to evaluate the influence of foliage applied zinc on growth, yield and oil contents of hybrid sunflower. Experimental treatments comprise of two sunflower hybrids viz. H1= Hysun-33 and H2= S-278 and three zinc levels viz. T1= Control (no application), T2=1% ZnSO4 and T3 = 2% ZnSO4. The experiment was laid out in Randomized Complete Block Design (RCBD) with split plot arrangement and repeated thrice. Data regarding growth, yield and oil contents were collected by using standard procedures. Results revealed that sunflower hybrid Hysun-33 gained maximum plant height (210.67cm), stem diameter (2.427), head diameter (15.533) achene number (852), achene yield (189.19 t ha-1), leaf area (789.56cm2) and oil contents (40.423%) followed by sunflower hybrid S-278. Zinc application significantly improved the yield and oil contents. In this regard, maximum plant height (194.67 cm), stem diameter (2.718cm), head diameter (14.633 cm), achene number (842.17), achene yield (194.56 t ha-1), leaf area (782.5cm2) and oil contents (40.12%) from 2% foliar application of zinc followed by 1% foliar application of zinc. Whereas, minimum plant height, stem diameter, head diameter, achene number, achene yield, leaf area and oil contents were recorded from control where no zinc was applied. Interaction of sunflower hybrids with zinc was also significant. In this contest, maximum plant height (231.67cm), stem diameter (2.917cm), head diameter (15.7cm), achene number (925.0), achene yield (205.89 t ha-1), leaf area (801.33cm2) and oil contents (41.65%) were recorded from sunflower hybrid Hysun-33 with 2% application of zinc followed by sunflower hybrid S-278 with 1% zinc foliar application. In Conclusion, sunflower hybrid along with the 2% foliar application of zinc is the most suitable combination to achieve higher yield and oil contents.


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