Cytological Investigations of the Microsporogenesis in Male-sterile Ramie (Boehmeria nivea Gaud.) and Its Offspring

Pierozzi, Neiva Izabel; Baroni, Renata Moro; Benatti, Romeu

doi:10.1508/cytologia.73.21

Cited by 6 publications

(1 citation statement)

References 48 publications

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“…The process is often related to the reduction of pollen fertility while some factors such as herbicides or pesticide treatment on crop culture can trigger the cytomixis. Laggard chromosomes and chromosome stickiness have also been documented in association with cytomixis in ramie (Pierozzi et al, 2008). A possible explanation for this association is that some genetic and also environmental factors might play a role in the occurrence of this relationship, as suggested by Sheidai et al (2003).…”

Section: Cytological Preparationmentioning

confidence: 97%

Cytological Analyses in ‘Niagara Branca’ Grape and in Its Somatic Mutant ‘Niagara Rosada’

Pierozzi

Moura

2014

Not Bot Hort Agrobot Cluj

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An investigation in the microsporogenesis of two cultivars of grapes (Vitis L.), were carried out on 'Niagara Branca' and on its somatic mutant 'Niagara Rosada', aiming at ascertaining the normality of the microsporogenesis. Some possible changes have been checked on chromosome number in somatic cells, pollen size and fertility, stomatal size and frequency, which related to the somatic mutant 'Niagara Rosada', thus increasing the information already obtained regarding 'Niagara' grapevines. The microsporogenesis occurred normally in both cultivars and cytomixis observed only among pachytene cells. A low percentage of precocious chromosome segregation was noticed in metaphase I and II, as well as a very low percentage of laggard and stickiness chromosomes in anaphase I and II. Less than 1% of tetrads showed microspore alterations. The mean values of the meiotic index and pollen grain fertility were high. However, no association were observed between the occurrences of chromosome abnormalities and the variation in the anther number (five to seven) seen among flower buds. The cultivars showed the same chromosome number, n=19 at diakinesis and 2n=38 in somatic cells, and did not differ in regards to stomatal size and frequency. It seems that the difference between the cultivars lied at gene level. Due to the very low percentage of abnormalities and to high pollen grain fertility, the plants analyzed could be very well employed in breeding programs for the grapevines.

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Section: Cytological Preparationmentioning

confidence: 97%

Cytological Analyses in ‘Niagara Branca’ Grape and in Its Somatic Mutant ‘Niagara Rosada’

Pierozzi

Moura

2014

Not Bot Hort Agrobot Cluj

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Ramie (Boehmeria nivea L. Gaud) Genetic Improvement

Satya

Mitra

Ray

2019

Advances in Plant Breeding Strategies: Industrial and Food Crops

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A taxonomic revision of the Boehmeria spicata complex (Urticaceae) in Korea

Kim

Lee

et al. 2021

Korean J. Pl. Taxon

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Seven species and two varieties belonging to the genus Boehmeria Jacq. (Urticaceae) are known to be distributed in Korea. Among them, B. spicata, B. tricuspis, and B. tricuspis var. unicuspis were subjected to an external morphological study. Among the individuals believed to exhibit variations in the leaf shape, B. gracilis and B. silvestrii were newly recognized. Unlike related taxa, B. gracilis has middle leaves with an elliptic, broadly elliptic, ovate, or broadly depressed ovate shape, a regular and serrulate-dentate margin, and an unlobed and short caudate or cuspidate apex. Boehmeria silvestrii has middle leaves with 5-angled ovate, orbicular ovate or broadly ovate shapes, and 3-or 5-lobed and caudate apices. Therefore, we assigned the corresponding names 'Top-geo-buk-kko-ri' and 'Cham-geo-buk-kko-ri'. Meanwhile, the B. spicata complex (B. gracilis, B. silvestrii, B. spicata, and B. tricuspis var. unicuspis) is very closely related in terms of the morphological characters, whereas B. tricuspis exhibits no relationship. Furthermore, because the scientific name and type specimen of B. tricuspis var. unicuspis (Pul-geo-buk-kko-ri) are problematic, the correct name B. paraspicata Nakai and corresponding holotype are presented. Additionally, lectotypes of B. gracilis and B. silvestrii are newly designated here. A taxonomic treatment, descriptions, a key, photographs, type specimens, and leaf variation images of the B. spicata complex are provided in this study.

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Cytological Investigations of the Microsporogenesis in Male-sterile Ramie (Boehmeria nivea Gaud.) and Its Offspring

Cited by 6 publications

References 48 publications

Cytological Analyses in ‘Niagara Branca’ Grape and in Its Somatic Mutant ‘Niagara Rosada’

Cytological Analyses in ‘Niagara Branca’ Grape and in Its Somatic Mutant ‘Niagara Rosada’

Ramie (Boehmeria nivea L. Gaud) Genetic Improvement

A taxonomic revision of the Boehmeria spicata complex (Urticaceae) in Korea

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