Improving some Economical Traits of Local Okra (Abelmoschus esculentus L. Moench) Through Selection and Inbreeding

Abstract

This investigation aimed to genetic improvement of local okra (cv. Balady) plants and to develop superior inbreds through selection and inbreeding. Three cycles of selection were employed in three consecutive seasons of 2013, 2014, 2015 and the developed inbreds were evaluated in summer season of 2016 with the local variety. The analysis of variance parameters showed a great variation for all studied traits within the cv. Balady. Therefore, the selection and inbreeding procedure resulted in isolation of twelve inbreds characterized by different horticultural traits. These inbreds showed uniform plants within each genotype. Highly significant variations were obtained for all the studied traits. On the basis of mean performance, the results of evaluation trial showed that the inbreds L5 and L8 were the earliest in flowering time. The selected inbreds L3, L6 and and L10 significantly exhibited the largest means of plant height. The developed inbreds significantly exceeded the cv. Balady for yield/plant and total yield, except for L8, L9 and L11. The selected inbreds L5 and L8 exhibited the largest means of pod length and pod weight and they surpassed the Balady pod measurements. The magnitudes of genetic variation were close to the magnitudes of phenotypic variation for all traits, indicating that the predomination of genetic component in the expression of the studied traits. There are positive and significant correlations between yield/plant and plant height, number of pods/plant and total yield/fed which prove the relative importance of the foregoing traits for yield improvement through selection of these traits. It is recommended to use the L3, L10, L4 and L7 inbreds for maximizing yield production Therefore, the foregoing inbreds are considered as promising genotypes suitable for growing under local environmental conditions.

Selection of new Architecture Lines from Egyptian Local Okra Cultivars (Abelmoschus esculentus L. Moench) Using Pure Line Selection Program

“…Thus, these important differences of genotypes allow comparison of means of different genotypes. These results agree with those obtained by Bello et al 2006;Soldier 2012;Ibrahim et al 2018; which recorded statistically significant differences among all tested genotypes for all studied traits when estimating the F test. pods number per plant 40.31 11.05 -60.33 30.21 32.11 10.22 -47.52 28.17 pods yield per plant (g) 165.16 150.13 -302.00 25.52 145.44 140.43 -234.78 25.33 Doi: 10.21608/ajas.2022 Okra's economic returns are influenced not only by the pod production, but also by the plant's development and the quality of the fruit.…”

“…So, okra crop has great chances of improvement, but to varied degrees that depending on the amount of variability, which in turn might provide more scope for selection of desired genotypes as well as better overall performance than their original populations. The obtained results agreed, generally, with those of Ibrahim et al 2013;Ibrahim et al 2018 on some local okra cultivars; who, found wide ranges of variation in most of the studied characters and concluded that the studied characters could be improved through selection methods.…”

“…Okra is grown in Egypt using local cultivars produced by farmers without referring to specialists in seed production. Therefore, it is possible to improve the okra crop by using local cultivars, as it is characterized by a high genetic diversity, as well as more ability to adapt to the local environment (Abd El-Maksoud et al 1984;Hussein, 1994;Masoud et al 2007;Ibrahim et al 2018). Variations in this crop allow for significant genetic improvement through various selection methods, leading to increased okra yield and access to new improved genotypes (Abo El-Khar, 2003;Masoud et al 2007;Ibrahim et al 2018).…”

Improving Earliness-Related Traits of Egyptian Local Okra Cultivar (Abelmoschus esculentus L. Moench)

“…This suggests that the three pure lines L4, L8, and L9 outperformed in terms of production, whether in terms of number or weight; the slight differences among them can be attributed to differences in the average pod weight Fig 2 . It is also clear from what was previously shown that the three pure lines L8, L4 and L9 also excelled in the trait of the early yield, whether by weight or number. Similar results were obtained by Abo-El-Khar 2003, Masoud et al, 2007;Metwally et al, 2011;Ibrahim et al, 2013;Ibrahim et al, 2018 andHelmy andRagheb, 2019, who practiced inbreeding with selection to develop new strains of okra and stated that this method resulted in producing superior genotypes derived from Egyptian local cultivars.…”