Current Science

Akanksha Singh ¹, Bashisth N. Singh ¹

Affiliations
1 Genetics Laboratory, Department of Zoology, Banaras Hindu University, Varanasi 221 005, IN

Abstract

In Drosophila bipectinata female remating with respect to productivity and sperm displacement was studied by employing two mutant strains and a wild-type strain. The comparison of productivity between oncemated (control) and remated females revealed that the productivity of remated females is significantly higher than that of once-mated females in all the crosses showing increased productivity after remating. The P2' values (proportion of second male progeny produced after remating) were calculated to test sperm displacement in each cross of remated females, which range from 0.60 to 0.67 extending the evidence for sperm displacement in D. bipectinata.

Keywords

Drosophila bipectinata, Female Remating, Postcopulatory Sexual Selection, Sperm Displacement.

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Akanksha Singh ¹, Antariksh Tyagi ¹, Abhinandan Mani Tripathi ¹, Sadashiv M. Gokhale ², Nandita Singh ³, Sribash Roy ¹

Affiliations
1 Genetics and Molecular Biology Division, CSIR–National Botanical Research Institute, Lucknow 226 001, IN
2 School of Biochemistry, Devi Ahilya Vishwavidyalaya, Indore 452 001, IN
3 Bio-mass Biology and Eco-Auditing, CSIR–National Botanical Research Institute, Lucknow 226 001, IN

Abstract

Morphological trait variations in four populations of Arabidopsis thaliana that grow along altitudinal gradients (~700 to ~3500 m amsl) are described. A total of 38 traits were analysed from each of the four populations. Most of the quantitative traits were significantly correlated with each other among the four populations, but biomass-related traits were negatively correlated with altitude. There was significant correlation between geographical distance and mean pairwise distance of phenotypic traits among the populations. Overall our data suggest there is significant variation in phenotypic traits of the four populations along altitudinal gradients.

Keywords

Altitudinal Gradients, Arabidopsis thaliana, Genomic Resources, Morphological Traits.

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