Genetic analysis and molecular mapping of fruit‐bearing habit locus (Bh1) in eggplant (Solanum melongena L.)

In eggplant, two kinds of fruit‐bearing habits can be observed, that is, cluster and solitary. The fruits grown in cluster are small in size but contribute towards yield and productivity. In this investigation, we have studied the genetics of fruit‐bearing habit and identified the SSR markers linked...

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Published in:Plant breeding 2024-06, Vol.143 (3), p.259-266
Main Authors: K. H., Sulochana, Saha, Partha, Tomar, Bhoopal Singh, Behera, Tusar Kanti, Ghoshal, Chandrika, Verma, Veerendra Kumar, Verma, Aakriti, S, Gopala Krishnan, Saha, Namita Das, Ray, Soham, Singh, Sanjay Kumar, Madhav, Maganti Sheshu
Format: Article
Language:English
Subjects:
Clusters
eggplant
Epistasis
Fruits
fruit‐bearing habit
Gene mapping
Genetic analysis
genetic inheritance
Genetics
Genotyping
segregation pattern
Solanum melongena
SSR markers
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Summary:In eggplant, two kinds of fruit‐bearing habits can be observed, that is, cluster and solitary. The fruits grown in cluster are small in size but contribute towards yield and productivity. In this investigation, we have studied the genetics of fruit‐bearing habit and identified the SSR markers linked to this trait. Pusa Safed Baingan 1 (cluster bearer) and Pusa Hara Baingan 1 (solitary bearer) having contrasting traits were crossed to generate F1 (20 plants), F2 (215 plants), B1 (73 plants) and B2 (64 plants). Genetic analysis of the trait was carried out using Chi‐square test. The segregation of plants in F2 suggested recessive epistasis with ratio of 9:3:4 (solitary: mixed: cluster) indicating involvement of two genes for controlling the fruit‐bearing habit. The parental polymorphic 6 SSR markers were used for genotyping F2 plants and co‐segregated with the fruit‐bearing habit (Bh1) locus in 1:2:1. A linkage map covering 63.86 cm distance was developed, the SSR marker emf11A03 was closest with a distance of 4.37 cm, emk03O04 at 12.5 cm distance, and emf21O06 at 14.5 cm. The physical positions of the SSR markers emb01J19 and emf11A03 flanking Bh1 gene were located at 4.77 mb position of contig Sme2.5_05721.1 and 5.18 Mb position of contig Sme2.5_00994.1, respectively. The findings in the present study will be helpful in marker‐assisted breeding to enhance yield in eggplant.
ISSN:0179-9541
1439-0523
DOI:10.1111/pbr.13161