Genetic variability studies in response to drought under different water regimes in muskmelon (Cucumis melo L.)

Abstract

A set of 40 genotypes of muskmelon (Cucumis melo L.) were evaluated in a randomized block design with two replications under different water regimes during summer 2012 at the agriculture research station Beechwal, Bikaner, Rajasthan, India to study genetic variability among the traits to determine selection criteria for breeding programmes for fruit yield and related characters. The results reported that drought stress caused reduction in fruit yield and most of the characters studied. Significant variations for all the characters were found under different water regimes (non-stress, 50% and 25%). High genotypic (GCV) and phenotypic (PCV) coefficient of variations were observed for fruit yield per plant, fruit weight per plant, vine length and proline content in non-stress, 50% and 25% water stress conditions respectively. High estimates of heritability along with high genetic advance as percentage of mean over the characters was recorded for fruit weight (128.79, 164.05, and 161.15), proline content (42.50, 72.86 and 69.26) and fruit yield per plant (149.61, 186.91 and 184.12) in both the non-stress and stress conditions. This shows that these traits were under the control of additive genetic effects. Therefore, it was concluded that selection for these traits should lead rapid genetic improvement of the material.

Deciphering genetic variability in melon (Cucumis melo L.) using morphological characters

“…On the other hand, low estimates for PCV and GCV (<10%) were recorded for days to first male flower anthesis and days to first female flower anthesis. Our results agreed with and Bhimappa and Choudhary (2017) for days to first male flower anthesis in muskmelon; Mishra et al (2017) and Pasha et al (2019) and Indraja et al (2021) for days to first female flower anthesis in snap melon and muskmelon, respectively. For all of the traits investigated, PCV was much higher than those of GCV, indicating that the variation was mainly attributed due to genotypic and environment interaction, with higher degree of environmental factors on the expression of these traits.…”

Keragaan Lima Varietas Melon (Cucumis melo L.) dengan Perlakuan Irigasi Cincin di Rumah Kaca

“…Nilai heritabilitas sedang (20%<h 2 bs <50%) terdapat pada karakter diameter batang, panjang ruas, panjang petiol, lebar daun, umur berbunga jantan, umur berbunga hermafrodit, panjang buah dan bobot buah, sedangkan karakter umur panen, diameter buah dan tabal daging buah memiliki nilai heritabilitas yang rendah (Tabel 5). Menurut Mishra et al (2017), karakter yang memiliki nilai heritabilitas yang rendah menunjukkan pengaruh lingkungan yang lebih dominan terhadap fenotipik tanaman.…”

Effect of Drought Stress on Growth of Soybean under Seedling Stage

“…Fluctuation in monsoon, climatic changes and varied ecoedaphic conditions are major issues that affect its productivity of rainfed crops including soybean (Hatfield and Prueger, 2015;Vijay et al, 2018;Kumari et al, 2020. Drought is one of the major abiotic stress that can bitterly reduce crops yield production, productivity as well as growth including soybean (Rodziewicz et al, 2014;Sinclair et al, 2014;Mishra et al, 2017;Lamaoui et al, 2018;Arya et al, 2021Choudhary et al, 2021Nikzad et al, 2023;Lumactud et al, 2023). Because, in past in each year one or other regions or one or other stages of crop, it was suffered from drought (Manavalan et al, 2009).…”