Appraisal of gene action for indeterminate growth in mungbean [Vigna radiata (L.) Wilczek]

Abstract

In order to investigate the inheritance pattern of indeterminate growth in Vigna radiata, various related traits were studied. The techniques used for the purpose were generation mean and variance analyses. Narrow sense heritability estimates were also computed. Four out of fifty greengram accessions were selected during preliminary screen trial based on DDd2 and DDh2 values. Two cross combinations were made by utilizing four parents. Generation variance analysis demonstrated the engagement of additive and environmental components, with the pre-pondrance of additive gene action. Narrow sense heritability estimates (>67%) also supported the same. In generation mean analysis both cross combinations manifested non-allelic epistatic digenic interactions for the investigated traits except for plant height at first flower initiation and for seed yield per plant in one cross combination, where only additive and dominance components were important. For pyramiding the additive genes favoring determinate plant growth, higher harvest index and simultaneously purging the genes promoting twining growth habit escorted with low seed yield, any modified breeding scheme which could serve the said purpose may be opted.

Genetic Effects Conferring Heat Tolerance in a Cross of Tolerant × Susceptible Maize (Zea mays L.) Genotypes

“…Higher magnitudes of additive variance in heat-stressed conditions pointed out its potential role in inheritance of plant traits which conferred heat tolerance in maize. Higher estimates of narrow sense heritability (F 2 and F ∞ ) and genetic advance further confirmed the role of few major genes and related genetic effects and the possibility of genetic progress of studied traits (Iqbal et al, 2015 ). Both heritability and genetic advance constitute an important selection criterion.…”

“…Based on χ 2 values, genetic models comprising two, three, four and five parameters (additive, dominance and epistatic interactions, i.e., additive-additive, additive-dominance, dominance-dominance) were found best suited to all characters under both environments. Involvement of non-allelic gene interaction in all traits corroborated the existence of potential variation for further exploitation (Iqbal et al, 2015 ). Both additive-dominance genetic effects were recorded for all traits under both conditions except transpiration rate under non-stressed regime which was found under the influence of only additive gene action.…”

“…Generation variance approach had been extensively utilized by various researchers for dissecting total variability into constituent components (Azizi et al, 2006 ; Iqbal et al, 2015 ). The classification of phenotypic variance into respective genetic and environmental components is not adequate for complete knowledge of the genetic basis of any source material (Shen et al, 2011 ).…”

Increased Plant Growth with Hematite Nanoparticle Fertilizer Drop and Determining Nanoparticle Uptake in Plants Using Multimodal Approach

“…The NP fertilizer-treated green gram plants were stronger with a 5-fold higher survival span compared to the control Journal of Nanomaterials plant. These green gram plants produced pods after 18 days, two times faster than other literature reports on regular plants [37]. Images of the healthy second-generation plants from the NP fertilizer-treated green gram seeds are included in the SI ( Figure S5).…”

Genetics of drought tolerance at seedling and maturity stages in Zea mays L.

“…Iqbal et al (2015) suggested usefulness of crossing among the desirable segregants in the segregating populations for those traits where early selection cannot be exercised. Dissection of total variance into D (additive), H (dominance), E (environmental), and F (interaction) components had been used previously for genetic studies (Haq et al, 2015;Iqbal et al, 2015). Contribution of additive (D) variance in contrast to other components was much higher in all the investigated traits.…”