Parent-offspring regression in meadow bromegrass (Bromus riparius Rehm.): Evaluation of two methodologies on heritability estimates

2004 ◽  
Vol 84 (1) ◽  
pp. 125-127
Author(s):  
Marcelo R. A. de Araujo ◽  
B. E. Coulman
Keyword(s):  
Regression Analysis ◽  
Block Design ◽  
Covariance Analysis ◽  
Regression Estimate ◽  
Regression Methods ◽  
Randomized Block Design ◽  
Bromus Riparius ◽  
Heritability Estimates ◽  
Analysis Error ◽  
Meadow Bromegrass

To determine the nature and extent of inflation of estimates of heritabilities by parent-offspring regression methods, 40 clones of meadow bromegrass (Bromus riparius Rehm.) and their half-sib progenies were studied in completely randomized block design trials, with six replications in Saskatoon and Melfort, Canada. Clones and progenies were evaluated for dry matter yield, seed yield, plant height, fertility index and harvest index. The results of the analysis showed a consistent inflation of heritability estimates derived from the simple parent-offspring regression, when compared to the regression estimate by variance-covariance analysis. The two methods successfully removed the environmental covariances from the estimates. However, in the simple regression analysis, error covariance was not removed from the numerat or; therefore, heritabilities estimated by this methodology were higher than those estimated by the variance-covariance method. It was concluded that estimates derived from variance-covariance analysis provide less biased estimates of heritability. Key words: Regression analysis, heritability, meadow bromegrass

scholarly journals Genetic variation and correlation of agronomic traits in meadow bromegrass (Bromus riparius Rehm) clones

2004 ◽  
Vol 34 (2) ◽  
pp. 505-510 ◽  
Author(s):  
Marcelo Renato Alves de Araújo ◽  
Bruce Coulman
Keyword(s):  
Genetic Variation ◽  
Crude Protein ◽  
Genetic Correlations ◽  
Neutral Detergent Fiber ◽  
Broad Sense ◽  
Grass Species ◽  
Broad Sense Heritability ◽  
Bromus Riparius ◽  
Heritability Estimates ◽  
Meadow Bromegrass

Meadow bromegrass (Bromus riparius Rehm.) is a recently introduced pasture grass in western Canada. Its leafy production and rapid regrowth have made it a major grass species for pasturing beef animals in this region. As relatively little breeding work has been done on this species, there is little information on its breeding behaviour. The main objective of this study was to estimate total genetic variability, broad-sense heritability, phenotypic and genetic correlations. Forty-four meadow bromegrass clones were evaluated for agronomic characters. Genetic variation for dry matter yield, seed yield, fertility index, harvest index, plant height, plant spread, crude protein, neutral detergent fiber and acid detergent fiber, was significant. Broad-sense heritability estimates exceeded 50% for all characters. Heritability estimates were at least 3.5 times greater than their standard errors. Phenotypic and genetic correlation between all possible characters were measured. There was general agreement in both sign and magnitude between genetic and phenotypic correlations. Correlations between the different characters demonstrated that it is possible to simultaneously improve seed and forage yield. Based on the results, it appears that the development of higher yielding cultivars with higher crude protein, and lower acid and neutral detergent fibers concentration should be possible.

scholarly journals Keragaman Fenotipe dan Heritabilitas Kedelai (Glycine max [L.] Merril) Generasi F6 Hasil Persilangan Wilis X Mlg2521

2017 ◽  
Vol 16 (2) ◽  
Author(s):  
Ridwan Kusuma ◽  
Nyimas Sa’diyah ◽  
Yayuk Nurmiaty
Keyword(s):  
Plant Height ◽  
Block Design ◽  
Grain Weight ◽  
Phenotypic Variance ◽  
Plant Weight ◽  
Randomized Block Design ◽  
Glycine Max L ◽  
Heritability Estimates ◽  
Number Of Seeds ◽  
Made In

Soybean consumption here in Indonesia continues to increase each year that is notaccompanied by an increase in soybean production. One way to increase soybeanproduction by using improved varieties. The purpose of this study were (1) Estimating thevalue of the diversity of phenotypes soy F6 generations from crosses between Wilis x Mlg2521,(2) Estimating the heritability estimates soybean F6 generations from crosses Wilis x Mlg2521,(3) Know the numbers expectation of F6 generation crosses Wilis x Mlg2521. The researchwas conducted from March 2014 until June 2014 at the Land Lab Lampung StatePolytechnic and observations made in Laboratory of Seed and Plant Breeding, University ofLampung. Soybean seeds used were F6 generation zuriat from Wilis x Mlg2521, Wilis andMlg2521. The treatment laid out in a randomized block design, 2 replications. The resultsshowed that (1) The diversity of phenotypes population F6 for characters date of flowering,harvesting age, plant height, number of productive branches, total number of pods plant,weight of 100 grains, grain weight plant and number of seeds plant including all the broadcriteria, (2) The value of heritability estimates the population F6 for characters date offlowering, harvesting age, plant height, number of productive branches, total number ofpods plant, weight of 100 grains, grain weight per plant and number of seeds plantbelonging to the high criteria, (3) Number expectations of the population F6 is 7-64-1-8 and7-64-1-3.Keywords: heritability, phenotypic variance, soybean

scholarly journals Response Of Chilli (Capsium annuum L.) To Zinc And Boron Application

2013 ◽  
Vol 38 (1) ◽  
pp. 49-59 ◽  
Author(s):  
KNC Shil ◽  
HM Naser ◽  
S Brahma ◽  
MN Yousuf ◽  
MH Rashid
Keyword(s):  
Regression Analysis ◽  
Interaction Effect ◽  
Block Design ◽  
Research Centre ◽  
Optimum Dose ◽  
Chilli Plant ◽  
Randomized Block Design ◽  
Barind Tract ◽  
Four Levels ◽  
Set Up

Field trial on chilli (cv. Bogra local) was conducted in Grey Terrace Soil under AEZ-25 (Level Barind Tract) at Spice Research Centre, Bogra during rabi seasons of 2005-2006, 2006-2007 and 2007-2008. The objectives were to evaluate the response of chilli to zinc and boron and to find out the optimum dose of zinc and boron for maximizing the yield. Treatments for this study comprised of four levels each of zinc (0, 1.5, 3.0, and 4.5 kg/ha) and boron (0, 1.0, 2.0, and 3.0 kg/ha) along with a blanket dose of N130 P60 K80 S20 Mg10 kg/ha. The experiment was set up in a randomized block design (factorial) with 3 replications. The integrated use of zinc and boron was found superior to their single applications. The interaction effect between zinc and boron was significant in case of yield of dry chilli and weight of ripe chilli/plant. The highest yield (1138 kg/ha) was recorded from Zn3B1 kg/ha, which was closely followed by Zn3B2, Zn4.5B2 and the lowest (703 kg/ha) in control (Zn0B0). The yield benefit over control varied from 4.4 to 61.9 % due to interaction effect. Consecutive three years studies showed almost similar trend of results. However, from regression analysis, the optimum-economic dose of zinc was found to be 3.91 kg/ha whereas it was 1.70 for boron. Hence, a package of (Zn3.91 B1.70 kg/ha) along with the said blanket dose may be recommended for maximizing the yield of chilli in the study area. Bangladesh J. Agril. Res. 38(1): 49-59, March 2013 DOI: http://dx.doi.org/10.3329/bjar.v38i1.15189

scholarly journals Hubungan Kandungan N- Total dan C-Organik Tanah terhadap Berat Panen Tanaman Pakcoy setelah Dikombinasikan dengan Kompos Sampah Kota dan Pupuk Kandang Sapi pada Aluvial, Indramayu

2021 ◽  
Vol 4 (1) ◽  
pp. 25-30
Author(s):  
Henly Yulina ◽  
Wiwik Ambarsari
Keyword(s):  
Regression Analysis ◽  
Linear Correlation ◽  
Block Design ◽  
Total Content ◽  
Organic Soil ◽  
Municipal Waste ◽  
Cow Manure ◽  
Randomized Block Design ◽  
Two Factors ◽  
Municipal Waste Compost

The objective of this research was to find out relationship between N- Total content and C- Organic soil to the harvest weight of pakcoy after combined with municipal waste compost and cow manure in Alluvial, Indramayu. This study used a randomized block design factorial with two factors. The first factor is municipal waste compost and the second factor is cow manure. Each of them consisted of 4 levels : 0%, 3.0%, 6.0%, and 9.0% with two replication, followed by regression analysis and linear correlation. The results showed that there was a relationship between N- Total content and C- Organic soil with harvest weight of pakcoy. The harvest weight of pakcoy was influenced by N- Total content and C-Organik soil, so that the N- Total and C-Organic soil can increase the harvest weight of pakcoy.

scholarly journals Water-retaining polymer as a soil conditioner in cowpea under water stress

2019 ◽  
Vol 9 (4) ◽  
pp. 680-686
Author(s):  
Marilia Barcelos Souza Lopes ◽  
Helio Bandeira Barros ◽  
Aloísio Freitas Chagas Júnior ◽  
Manoel Mota dos Santos ◽  
Niléia Cristina da Silva ◽  
...  
Keyword(s):  
Regression Analysis ◽  
Water Stress ◽  
Grain Yield ◽  
Computer System ◽  
Analysis Of Variance ◽  
Block Design ◽  
Soil Conditioner ◽  
The North ◽  
Randomized Block Design ◽  
Pod Length

Cowpea is no longer a family-oriented crop. Today it is cultivated by medium and large farmers in the North and Northeast, due to their adaptation to edaphoclimatic conditions. The objective of this work was to evaluate the efficiency of hydrogel utilization in the retention and availability of water for the development and production of Cowpea beans when subjected to water stress. The experiment was conducted in a randomized block design with four replications in a 5 x 2 factorial scheme, with five concentrations (0, 5, 10, 15 and 20 kg ha-1) and two sources of hydrogels (Hydroplan-EB HyC and Polim-Agri). The cowpea cultivar used was BRS Vinager. The following characteristics were evaluated: number of pods per plant; Number of grains per pod; Pod length: one hundred grain mass and grain yield. The data were submitted to analysis of variance, with the application of the test F. Regression analysis was performed with the help of the SISVAR computer system. The use of hydrogel was an alternative to reduce losses resulting from the action of water stress; the concentrations of hydrogels between 15 and 18 kg ha-1 resulted in higher number of pods per plant, number of grains per pod, the mass of one hundred grains and yields of grains.

scholarly journals Rates of Nicosulfuron Applied in Glyphosate-Tolerant and Sulfonylurea-Tolerant Soybean

2019 ◽  
Vol 37 ◽  
Author(s):  
A.F.M. SILVA ◽  
A.J.P. ALBRECHT ◽  
G.S. SILVA ◽  
E.S.F. KASHIVAQUI ◽  
L.P. ALBRECHT ◽  
...  
Keyword(s):  
Regression Analysis ◽  
Experimental Design ◽  
Plant Height ◽  
Block Design ◽  
Grain Weight ◽  
Agronomic Performance ◽  
Thousand Grain Weight ◽  
Plant Yield ◽  
Randomized Block Design ◽  
Significant Damage

ABSTRACT: STS cultivars tolerate up to four times higher rates of chlorimuron than those recommended for non-tolerant cultivars, without significant damage. However, few studies position the selectivity of nicosulfuron in STS cultivars. The aim of this study was to assess the selectivity of rates of the herbicide nicosulfuron applied in the post-emergence (V4) of RR/STS soybean. The experiments were conducted in the 2015/16 and 2016/17 seasons in Piracicaba, SP. In the 2016/17 season, the experiment was also conducted in Palotina, PR. Treatments consisted of six rates of the herbicide nicosulfuron (0, 50, 100, 150, 200, and 250 g a.i. ha-1). The experimental design was a randomized block design with four replications. The symptoms of injury were assessed at 7, 14, 21, and 28 days after application, as well as the assessment of variables related to the agronomic performance (plant height, number of pods per plant, yield, and one thousand-grain weight). The data were submitted to regression analysis (p<0.05). The estimated rates reduced yield by 5% in relation to the rate 0 and were between 57.79 and 68.37 g a.i. ha-1. In general, the RR/STS soybean is tolerant to the application of nicosulfuron up to 57.79 g a.i. ha-1 when considering the estimated rates. Therefore, the RR/STS soybean is tolerant to the application of nicosulfuron up to 50 g a.i. ha-1, according to the applied rates.

scholarly journals Respon Pertumbuhan dan Hasil Tanaman Kacang Tanah Pada Aplikasi Biochar Bambu

GEMA AGRO ◽  
2018 ◽  
Vol 23 (1) ◽  
pp. 18
Author(s):  
Kadek Suparta ◽  
Luh Kartini ◽  
Yohanes Parlindungan Situmeang
Keyword(s):  
Regression Analysis ◽  
Plant Height ◽  
Block Design ◽  
Dry Weight ◽  
Growth And Yield ◽  
Dose Treatment ◽  
Optimum Dosage ◽  
Randomized Block Design ◽  
Dose Control ◽  
Number Of Leaves

This study aims to determine the effect of bamboo biochar dose on the growth and yield of peanut crops. This study used a randomized block design with one factor. The tested treatments were dosage of biochar fertilizer with 4 dosage levels and one treatment without biochar dose (control), with the treatment arrangement as follows: without biochar, 4 ton ha-1, 8 ton ha-1, 12 ton ha-1, 16 ton ha-1. This treatment was repeated 3 times to obtain 15 plot experiments. The results showed that the biochar dose treatment had significant effect on all observed variables, except the variable of plant height and maximum number of leaves per plant had no significant effect. The highest yield of dry seed oven of seeds per plant was obtained in the dosage of 4 ton ha-1 biochar dose of 21.83 g, an increase of 111.81% compared with no biochar 10.33 g. Based on regression analysis, the optimum dosage of biochar is 7.50 ton ha-1, with dry weight of oven seed per plant maximum 19.03 g.

scholarly journals Utilization of Bamboo Biochar and Phonska Fertilizer on Cultivation of Maize (Zea mays L.)

2018 ◽  
Vol 2 (1) ◽  
pp. 67 ◽  
Author(s):  
Petrus Malo Ngongo
Keyword(s):  
Zea Mays ◽  
Regression Analysis ◽  
Zea Mays L ◽  
Block Design ◽  
Dry Weight ◽  
Growth And Yield ◽  
Optimum Dose ◽  
Randomized Block Design

This study aims to investigate the effect of biochar and phonska as well as its interaction on the growth and yield of corn crops. This experiment used a randomized block design (RBD), a factorial pattern with 2 factors. The first factor was the biochar dose consisting of 4 levels, ie: without biochar, 5 t ha-1, 10 t ha-1, and 15 t ha-1. The second factor was the dose of phonska fertilizer consisting of 2 levels: without phonska and 300 kg ha-1. The results showed that the dose of biochar 10 t ha-1 gave the highest dry weight of seed per hectare of 8.12 tons, an increase of 32.77% compared with without biochar of 6.12 tons. The treatment of phonska fertilizer dosage of 300 kg ha-1 gave the highest dry weight of seed per hectare of 8.07 tons and the increase of 26.68% compared with without phonska of 6.37 tons. Based on a result of regression analysis test obtained optimum dose 10.44 t ha-1 with a dry weight of seed per ha maximum 7.90 ton. Keywords: charcoal, bamboo biochar, NPK phonska, corn

Innovation of Natural Preservation of Mackerel (Rastrelliger kanagurta) Using Coconut Coconut Ashes with Drying Time Variations on Hedonics

2020 ◽  
Vol 2 (2) ◽  
Author(s):  
Rika Agustina ◽  
Rita Sunartaty ◽  
Teuku Makmur
Keyword(s):  
Research Design ◽  
Block Design ◽  
Drying Time ◽  
Basic Ingredient ◽  
Randomized Block Design ◽  
Salt Substitute ◽  
Long Time ◽  
Time Variations ◽  
Rastrelliger Kanagurta

Coconut frond ash is one of the wastes from coconut trees which has not been maximally utilized. Coconut frond ash contains MgCl2 and KCl so that it can be used as a salt substitute in the process of preserving fish. In this study coconut frond ash was used as a basic ingredient for making dried mackerel with a long time of drying to storage. The purpose of this study was to determine the effect of drying time on mackerel storage. The research design used was a Randomized Block Design (RCBD) with 2 factors studied. The first factor is the drying time consists of 3 levels, namely P1 = 3 days, P2 = 4 days, P3 = 5 days. The second factor is storage which consists of 3 levels, namely S1 = 30 days, S2 = 60 days, S3 = 90 days. Each treatment was repeated 2 times to obtain 18 experimental units to observed hedonic tests. From the results of the study it can be stated that the treatment has a very significant effect (P≥0.01) on the hedonic test which includes (color, aroma, taste and texture).

Kualitas Semen Cair Kambing Boer Berbahan Pengencer Air Kelapa Muda Varietas Viridis Setelah Simpan Dingin

2019 ◽  
Vol 6 (1) ◽  
pp. 78
Author(s):  
Muhammad Ade Salim ◽  
Muhammad Nur Ihsan ◽  
Nur Isnaini ◽  
Trinil Susilawati
Keyword(s):  
Semen Quality ◽  
Block Design ◽  
Animal Husbandry ◽  
Egg Yolk ◽  
Coconut Water ◽  
Boer Goat ◽  
Randomized Block Design ◽  
Frozen Semen ◽  
Artificial Vagina

ABSTRAKAir kelapa muda varietas viridisdapat dijadikan pengencer aletrnatif semen cair bagi program IB di daerah minim sarana semen beku. Tujuan penelitian ini untuk menguji pengaruh penggunaan air kelapa muda viridissebagai bahan pengencer terhadap kualitas semen cair kambing Boer setelah didinginkan. Dilaksanakanselama 3 bulan di Laboratorium Fakultas Peternakan UBUnit SumberSekar,Malang. Metodenya yaitu eksperimen. Semen dari  3 pejantan Boer umur 3-5 tahun, dikoleksi seminggu sekali dengan VB. Air kelapa mudaviridis umur 5-7 bulan serta tris aminomethane sebagai kontrol. Didesain menggunakan Rancangan Acak Kelompok (RAK) dengan 2 perlakuan yaitu P0 (tris aminomethane + 10% KT) dan  P1 (air kelapa muda viridis + 10% KT) masing-masing diulang 10 kali. Data dianalisis dengan analisis Ragam (Anova) dengan software Genstat 18. Variabelnya yaitu motilitas individu, viabilitas dan abnormalitas. Hasil penelitian yaitu motilitas individu pada P1bertahan sampai 4 hari (40,5± 24,3%), viabilitas terbaik sampai hari ke-5 (42±24,6%), abnormalitas terendah di hari ke-7(1,31± 0,6). Kesimpulannya, Pengencer air kelapa muda viridis dapat mempertahankan kualitas semen cair kambing Boer selama 4 hari untuk motilitas dan 5 hari untuk viabilitas.Kata Kunci:pengencer, air kelapa, varietas viridisABSTRACTYoung viridis coconut water could be used as an alternative to liquid semen diluent for artificial insemination program in the area with limited facility for frozen semen production. This study evaluated the use of young coconut water as a diluent on liquid semen quality of Boer goat after cold storage. This study was carried out for 3 months at Sumber Sekar Laboratory, Faculty of Animal Husbandry, University of Brawijaya, Malang. The semen was collected from 3 Boer bucks aged at 3 to 5 years old. The semen collection was done once a week with the aid of artificial vagina. The diluents used were young Viridis coconut (5 to 7 months old) and tris aminomethane. The method used was an experiment in a randomized block design with 2 treatments and 10 replicates. The treatments used were T0: tris aminomethane + 10% egg yolk (control) and T1:  young Viridis coconut water + 10% egg yolk. Data were analyzed by analysis of variance using Genstat 18 software. The variables measured were sperm individual motility, viability, and abnormality. The results showed that the sperm individual motility in T1 survived up to 4 days (40.5± 24.3%), the best viability at 5 days (42.0±24.6%),  while the lowest abnormality at 7 days (1.31±0.6). It could be concluded that: 1. Tris aminomethane diluent has higher quality with the storage length up to 9 days, 2. Young Viridis coconut water diluent could preserve liquid semen quality of Boer goat up to 4 days for sperm motility and 5 days for sperm viability.Keywords: diluents, coconut water, viridis variety

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