Genetic Variability And Heritability For An Intercultivar Cross Of Peanuts1

1978 ◽  
Vol 5 (1) ◽  
pp. 23-26 ◽  
Author(s):  
J. C. Wynne ◽  
J. O. Rawlings
Keyword(s):  
Maximum Likelihood ◽  
Genetic Variability ◽  
Arachis Hypogaea ◽  
Narrow Sense ◽  
Fruit Traits ◽  
Additive Variance ◽  
Reciprocal Crosses ◽  
Fruit Length ◽  
Mating Design ◽  
Arachis Hypogaea L

Abstract Genetic variances for yield and several fruit traits for the F5 and F6 generations of an intercultivar peanut (Arachis hypogaea L.) cross were estimated by maximum likelihood procedures from a nested mating design. Estimates of additive and additive by environmental variances were significant for yield and the fruit traits for the cross between the two Virginia (ssp. hypogaea var. hypogaes) cultivars. Estimates of additive by additive variance were essentially zero for all traits; however, estimates of additive by additive by environmental variances were larger than their associated standard deviations for all traits except yield. Narrow sense estimates of heritability over reciprocal crosses and environments ranged from 0.54 for yield to 0.89 for fruit length. Progress from selection in late generations should be expected for this peanut cross.

scholarly journals Genetic analysis of some agronomic traits in groundnut (Arachis hypogaea L.)

2014 ◽  
Vol 3 (2) ◽  
pp. 31-35
Author(s):  
MK Alam ◽  
UK Nath ◽  
MAK Azad ◽  
MA Alam ◽  
AA Khan
Keyword(s):  
Arachis Hypogaea ◽  
Harvest Index ◽  
Agronomic Traits ◽  
Kernel Weight ◽  
Narrow Sense Heritability ◽  
Additive Variance ◽  
Gene Effects ◽  
Degree Of Dominance ◽  
Arachis Hypogaea L ◽  
Additive Gene

A 10×10 half diallel experiment was conducted on groundnut (Arachis hypogaea L.) to ascertain the gene action and genetic parameters of ten traits including 50% flowering, no. of pods per plant, plant height, harvest index, pod index, 100 pod weight, 100 kernel weight, pod size, diseases infection and yield per plot. The experiments were carried out in the Department of Genetics and Plant Breeding, Bangladesh Agricultural University (BAU), Mymensingh during the cropping season of 2010-2011. The estimates of gene effects indicated that significance of both additive and non-additive variance for pod size, 100 pod weight and diseases infection among the traits and presence of over dominance satisfying assumptions of diallel except dormancy. However, both the additive and non-additive gene affects together importance to control of most quantitative traits in the groundnut. The average degree of dominance (H1/D) 1/2 (H1 = dominance variance, D = additive variance) was higher than one, indicating over dominance for all the traits. The narrow-sense heritability was high for 50% flowering (38%), harvest index (35%), pod size (52%), 100 pod weight (35%) and yield per plot (41%) indicating that great genetic gain could be achieved for them. DOI: http://dx.doi.org/10.3329/ijarit.v3i2.17841 Int. J. Agril. Res. Innov. & Tech. 3 (2): 31-35, December, 2013

Cultivar x Environment Interactions in Peanut Yield Tests1

1978 ◽  
Vol 5 (2) ◽  
pp. 102-105 ◽  
Author(s):  
J. C. Wynne ◽  
T. G. Isleib
Keyword(s):  
North Carolina ◽  
Arachis Hypogaea ◽  
Second Order ◽  
Fruit Traits ◽  
Order Interaction ◽  
Arachis Hypogaea L ◽  
Production Area ◽  
Yield Trials

Abstract Cultivar x environment interactions for yield and several fruit traits were estimated from two groups of Virginia peanut (Arachis hypogaea L.) cultivar yield trials conducted in the Virginia-North Carolina production area. A substantial cultivar x location x year second-order interaction was observed for yield in both studies. Both cultivar x location and cultivar x year interactions were small when compared to the variation among cultivars. No advantage could be gained by subdividing the production area into subareas for breeding or testing purposes. However, a reallocation of the number of plots presently used could give comparable estimates of cultivar performance and reduce the time necessary for cultivar evaluation.

scholarly journals Estimation of Genetic Parameter for Quantitative Characters of Pepper (Capsicum annuum L.)

2014 ◽  
Vol 1 (1) ◽  
pp. 4-8 ◽  
Author(s):  
Muhamad Syukur ◽  
Syaidatul Rosidah
Keyword(s):  
Plant Height ◽  
Genetic Parameters ◽  
Genetic Parameter ◽  
Stem Diameter ◽  
Broad Sense Heritability ◽  
Narrow Sense ◽  
Narrow Sense Heritability ◽  
Additive Variance ◽  
Fruit Length ◽  
Quantitative Characters

The research was conducted at Leuwikopo Experimental Field and Plant Breeding Laboratory of IPB, Dramaga, Bogor, West Java, Indonesia from October 2012 to April 2013. Crossing population between C15 and C2 genotype were used to study genetic parameters for quantitative characters in pepper. All the characters were not controlled by maternal effect, except fruit length. Broad-sense heritability were high for plant height, stem diameter, dichotomous height, days to flower, days to harvest; and medium for fruit length and diameter. Narrow-sense heritability was high for stem diameter, dichotomous height, days for flowering; medium for plant height, days to harvest; and low for fruit length and diameter. The ratio of additive variance was high for all the characters, except for fruit length and fruit diameter.Keywords: heritability, heterosis, heterobeltiosis, additive variance, dominant variance

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