Hayman’s diallel analysis to study genetic parameters of F1 generation of some bacterial wilt resistant intraspecific hybrids of bell pepper (Capsicum annuum L. var. grossum) under North Western Himalayan conditions of India

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Research Articles | Published:

Print ISSN : 0970-4078.
Online ISSN : 2229-4473.
Website:www.vegetosindia.org
Pub Email: contact@vegetosindia.org
Doi: 10.1007/s42535-022-00389-0
First Page: 1150
Last Page: 1157
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Keywords: Bell pepper, Bacterial wilt resistant, Genetic parameters, Gene action, Graphical analysis, Hybrids


Abstract


Six bacterial wilt resistant bell pepper inbreds were utilized to breed 30 cross-combinations. Genetic parameters viz., D, F, H1, H2, h2 and E for 14 traits were estimated with the method of analysis proposed by Hayman. Significant diversity among parents was confirmed by the graphical sketches. Variance analysis revealed the significance of both additive and non-additive components of variance in domineering the heritage of the characters under study which was further confirmed by the non-significant values of correlation coefficient ‘r’ amongst standardized parental measurements (Yr) and parental order of dominance (Wr + Vr). Based on values of F and KD: KR ratio, a predominance of dominant alleles was observed in the parents for days to 50% blossoming, days to first harvest, primary branches per plant, harvest duration, average fruit weight, fruit yield and bacterial wilt incidence. Whereas an equivalent contribution of both dominant and recessive genes was observed in lobes per fruit, fruit length, fruit width, pericarp thickness, TSS, plant height as well as marketable fruits per plant. The mean degree of dominance (H1/D)1/2 was more than one for majority of traits thereby indicating over dominance. H2/4H1 ratio showed irregular allocation of positive and negative genes for all the traits studied except lobes per fruit (0.25) and pericarp thickness (0.29). Similar results were revealed by graphical analysis thereby confirming the function of non-allelic interaction i.e., epistatis. The positive estimates of ‘Y’ intercept ‘a’ for all the characters studied suggested partial dominance.


Bell pepper, Bacterial wilt resistant, Genetic parameters, Gene action, Graphical analysis, Hybrids


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Acknowledgements


The authors are grateful to the Vice Chancellor, CSK HPKV, Palampur for providing the infrastructure and research facilities to carry out the research work.


Author Information


Dhillon Harnoor Kaur
Department of Vegetable Science and Floriculture, CSK HPKV Palampur, Himachal Pradesh, India
harnoorkaurdhillon87@gmail.com
Sood Sonia
Department of Vegetable Science and Floriculture, CSK HPKV Palampur, Himachal Pradesh, India


Sood V. K.
Department of Genetics and Plant Breeding, CSK HPKV Palampur, Himachal Pradesh, India


Chahota R. K.
Department of Biotechnology, CSK HPKV Palampur, Himachal Pradesh, India