Pollen parameters estimates of genetic variability among newly selected Nigerian roselle (Hibiscus sabdariffa L.) genotypes

Abstract

Estimates of some pollen parameters where used to assess the genetic diversity among some newly selected Nigerian Roselle (Hibiscus sabdariffa L.). Standard procedures were used to determine the pollen parameters such as: percentage pollen fertility, percentage pollen sterility, pollen diameters as well as anther diameters. The cytological results revealed significant (P ≤ 0.05) variation in the diameters of anther cap and pollen grains. Anther morphology and pollen grain morphology of the H. sabdariffa genotypes under light microscope showed fair diversity in the Anther and pollen grain sizes. The Roselle genotypes were grouped according to their anther sizes into small (< 400 μm), medium (400-700 μm) and large (> 700 μm); such character should be included in examining genetic diversity in this crop. The dendrogram produced from the cluster analysis of the different genotypes of the roselle based on diameters of the pollen grains and that of the anther cap-sizes also separate the genotypes into different groups. The results obtained in terms of percentage pollen fertility also showed some interesting variations. It is not untrue that larger pollen grain could serve as a better pollinizer than a smaller pollen grain; moreover, successes in crossing among such plants could be dependent on the sizes of the pollen. The pollen grain size variations obtained from this study is of good taxonomic value. The variation in the anther and pollen grain sizes could also be as a result of different genetic make of the Roselle genotypes and could serve as important diagnostic tool in differentiating Nigerian Roselle genotypes and achieving the cytotaxonomy of the crop. It is therefore concluded that there exist genetic variability among the pollen grains and anthers of the new selected Nigerian Roselle (H. sabdariffa) genotypes; these characters are good taxonomic parameters that could be used in evaluating genetic diversity of the crop in the study area. It is recommended that other pollen viability staining techniques should be employed to ascertain the level of the pollen fertility among the Roselle Genotypes. In addition, DNA-PCR technique should be used to further confirm the variability observed in this present study.

Evaluation of Agro-morphological and Pollen Parameters of M&lt;sub&gt;2&lt;/sub&gt; Generation of &lt;i&gt;Capsicum annuum&lt;/i&gt; Exposed to Fast Neutron Irradiation (FNI)

“…Pollen production/viability Pollination and fertilization among crop plants are compulsory to obtain fruits and seeds [12]. The increase in pollen production with increase in IEP recorded in Capsicum annuum is in agreement with work of [6] who reported that increase in pollen production also increases the chances of genetic variation.…”

Comparative Morpho-Agronomic and Biochemical Profiling of Different Roselle Morphotypes Based on their Growth and Yield Associated Attributes

“…Hibiscus sabdariffa var. sabdariffa, sometimes known as Roselle or Sorrel, is an annual flowering plant in the Malvaceae family that is cultivated primarily for its leaves, stem, seed, and calyces [1][2][3][4][5]. It is a source of natural antioxidants and micronutrients with culinary, nutritional, and therapeutic benefits [6][7][8][9][10].…”

Antioxidative and antidiabetic activity and phytochemicals analysis of some selected Sudanese traditional medicinal plants.

“…Hibiscus sabdariffa L. is one of the hibiscus species belonging to the Malvaceae family. It is native in various environments of many countries and multiple regions (Daudu et al, 2019). It is a 2-2.5 m tall annual or perennial plant or woody-based subshrub.…”

“…Hibiscus sabdariffa L. commonly known as roselle is one of the hibiscus species, belonging to the Malvaceae family. It is native to Africa and Asia and commonly grown in many countries as garden shrub (Daudu et al, 2019). This plant is frequently utilized in various traditional medicine applications such as hypertension, heart disease, stomach pain as well as kidney and skin diseases (Kapoor et al, 2021).…”