Breeding value of the X-ray induced macro-mutan III. The nature of genetic variability within mutated backgrounds of a single macro-mutant locus in cultivated peanuts (Arachis hypogaea L.)

Abstract The objective of this study was to investigate the possibility of index selection for pod yield and leafspot resistance, causal organisms Cercospora arachidicola Hori and Cercosporidium personatum (Berk. and Curt.) Deighton, in peanut (Arachis hypogaea L.). Eleven crosses were evaluated in the S1 and S2 generations under natural disease pressure for pod yield and disease reaction. Leafspot severity was measured by leaf necrotic area and defoliation. Variances for each trait and covariances between traits were estimated by progeny analysis. Economic weights assigned to the different characters were derived as the ratio of the pod yield for a genotype to the theoretical pod yield gain from leafspot resistance. Indices were constructed and their efficiency both as predictor of the breeding value and relative to individual selection for either trait was evaluated. Index selection for increased pod yield and reduced leafspot susceptibility was between 87% and 100% as efficient as direct selection for either trait. Combining several leafspot severity readings with pod yield did not improve the efficiency of the index. Fourteen to 17% of the breeding value of the population was accounted for by the traits combined in various indices. This indicated that there is potential for improvement of these indices.

Download Full-text

An assessment of genetic variability and traits association among high oleic advanced breeding lines for yield and quality traits in groundnut (Arachis hypogaea L.)

Electronic Journal of Plant Breeding ◽

10.5958/0975-928x.2017.00029.1 ◽

2017 ◽

Vol 8 (1) ◽

pp. 201

Author(s):

Om Prakash Patidar ◽

H.L. Nadaf

Keyword(s):

Genetic Variability ◽

Arachis Hypogaea ◽

Quality Traits ◽

Breeding Lines ◽

High Oleic ◽

Yield And Quality ◽

Arachis Hypogaea L

Download Full-text

Genetic Variability And Heritability For An Intercultivar Cross Of Peanuts1

Peanut Science ◽

10.3146/i0095-3679-5-1-6 ◽

1978 ◽

Vol 5 (1) ◽

pp. 23-26 ◽

Cited By ~ 1

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.

Download Full-text