A profile of chromosome counts, male meiosis and pollen fertility in 45 species of Asteraceae from Parvati Valley in Kullu district, Himachal Pradesh

Gupta, Himshikha; Gupta, Raghbir Chand; Kumar, Rohit; Singhal, Vijay Kumar

doi:10.1080/00087114.2017.1299976

Cited by 13 publications

(7 citation statements)

References 22 publications

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“…All the presently analyzed six accessions of A. roxburghiana gathered from cold deserts of Ladakh division (Jammu and Kashmir) and Chamba, Kullu, and Kinnaur districts of Himachal Pradesh showed the same gametic chromosome number of n=9 and existed at diploid level. The gametic chromosome number confirm previous chromosome number (2n=18) reported from various regions of Himalayas in India (Mehra and Remanandan 1974, Kaul and Bakshi 1984, Gupta et al 1989, Kaur 2012, Malik 2012, Bala and Gupta 2013and Gupta et al 2017. However, the plants in Kashmir Himalayas is also known to have intraspecific tetraploid cytotype with 2n=36 (Khoshoo and Sobti 1958, Koul 1964, Bhat et al 1974, Kaul and Bakshi 1984.…”

Section: Discussionsupporting

confidence: 84%

A Case of Structural Heterozygosity Affecting Chiasma Frequency and Pollen Fertility in Natural Populations of Artemisia roxburghiana

et al. 2019

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Meiotic studies have been carried out on six accessions of Artemisia roxburghiana from four regions of Western Himalayas. The accessions collected from Chamba, Kinnaur and Kullu districts of Himachal Pradesh and Kargil district of Jammu and Kashmir showed a normal meiotic course leading to high pollen fertility. However, the accession collected from Drass region of cold deserts of Ladakh, Jammu, and Kashmir showed abnormal meiosis caused by structural heterozygosity for reciprocal translocations. The present study adds the first report of structural heterozygosity in the species. Chiasma frequency was also calculated in the accessions to see the effect of reciprocal translocations. Besides, reciprocal translocation, the accession also showed various meiotic abnormalities in the form of the early disjunction of bivalents, chromatin bridges and laggards leading to abnormal microsporogenesis. Structural heterozygosity and other meiotic abnormalities in the accession seem to be responsible for a reduction in pollen fertility.

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Section: Discussionsupporting

confidence: 84%

A Case of Structural Heterozygosity Affecting Chiasma Frequency and Pollen Fertility in Natural Populations of Artemisia roxburghiana

et al. 2019

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“…(Vega & Dematteis, 2016); Lactuca dolicophylla Kitam, Chrysanthemum leucanthemum L. and Eupatorium adenophorum Spreng. (Gupta et al, 2017). This type of abnormality also was found in all species studied of the closely related genus Chrysolaena H. Rob.…”

Section: Inferences On Gamete Formation: Meiotic Behavior and Tetradssupporting

confidence: 59%

Male gametophyte development and cytogenetics of natural diploid and polyploid species of the South American genus Lessingianthus (Asteraceae, Vernonieae)

Pérez

González

Angulo

2023

Darwiniana, nueva serie

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In view of the scarce cytoembryological knowledge of Lessingianthus and in order to understand the contribution of polyploidy to the evolution of the genus we perform a developmental survey of anthers with the main objective of study if the different ploidy level affect the anther and pollen development in Lessingianthus species and infer the male fertility of diploid and polyploid species. Our results showed that diploid and polyploid species have normal anther development, thus polyploidy did not affect the anther wall development. The following male embryological traits are conserved among the species: tetrasporangiate anthers, four-layered anther wall of dicotyledonous development, with uniseriate persistent epidermis, invasive tapetum, tetrahedral or isobilateral tetrads, and 3-celled pollen grains. Diploid and polyploid species had high male fertility: both presented relatively high meiotic regularity and therefore formed normal viable spores independently of the ploidy level. Lessingianthus argenteus, the only species with high irregular behavior, might be a neopolyploid species. The eight studied species of the genus presented different percentages of meiotic irregularity at the different phases observed. In diploid specimens the irregularities were concentrated in anaphase of meiosis I, whereas in polyploid specimens the irregularities were dispersed through the phases of meiosis II. The main abnormal behavior identified, and therefore the main mechanisms of unreduced microspore formation, were chromosomes out of plate, bridges without fragments and asynchrony of meiosis I and II. These features broadened the male cytoembryological knowledge of the genus, confirming the suggestion that embryological characters related to male gametophyte development are conserved among the studied species. The results contribute to understand the mechanisms of polyploid formation which is an important process during the evolution of the genus.

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“…In the species, there seems to be a direct correlation of pollen sterility with structural heterozygosity. Similar effects of structural heterozygosity resulting in non-viable pollen grains has been reported in a number of plants, namely, Chrysanthemum zawadskii (Kim et al 2008), Artemisia parviflora (Gupta et al 2010), Astragalus chlorostachys (Rana et al 2012), Saxifraga diversifolia (Kumar and Singhal 2013), Achillea millefolium (Singhal et al 2014) and Anemone rivularis (Kumar et al 2015). Gohil and Koul (1978) and Sharma and Gohil (2003) have reported that structural heterozygotes of Allium consanguineum and A. roylei depicted complete gametic sterility due to reciprocal translocations, respectively.…”

Section: Discussionmentioning

confidence: 77%

“…The structural heterozygotes are known to induce a high frequency of non-viable male gametes following the duplication or deficiencies of genes. The pollen sterility in a translocation heterozygote largely depends upon whether the orientation of multivalents is of adjacent or alternate type at M-I (Ghaffari et al 2009, Gupta et al 2010, Kumar et al 2015. Analysis of data in the presently analysed accessions revealed that there is a direct correlation between the frequency of multiple chromosomal associations and amount of pollen sterility.…”

Section: Discussionmentioning

confidence: 99%

Structural Heterozygosity for Reciprocal Translocations Affecting Chiasma Frequency and Pollen Fertility of a Natural Tetraploid of Anthoxanthum odoratum L. from Northwest Himalayas

Kumar

Kumari

2017

CYTOLOGIA

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Summary An accession-based study carried out on Anthoxanthum odoratum from Kullu district revealed a tetraploid chromosome count of n=10 and the presence of multiple chromosomal associations of up to 10 chromosomes due to structural heterozygosity for reciprocal translocations. Owing to the presence of multivalents, the individuals showed considerable amounts of non-viable male gametes. Structural heterozygosity in the species has also been detected to affect the chiasma frequency significantly, thereby increasing the variability. Similar effects of translocations in increasing chiasma frequency and affecting pollen fertility have been reported by workers in other species.

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A profile of chromosome counts, male meiosis and pollen fertility in 45 species of Asteraceae from Parvati Valley in Kullu district, Himachal Pradesh

Cited by 13 publications

References 22 publications

A Case of Structural Heterozygosity Affecting Chiasma Frequency and Pollen Fertility in Natural Populations of <i>Artemisia roxburghiana</i>

A Case of Structural Heterozygosity Affecting Chiasma Frequency and Pollen Fertility in Natural Populations of <i>Artemisia roxburghiana</i>

Male gametophyte development and cytogenetics of natural diploid and polyploid species of the South American genus Lessingianthus (Asteraceae, Vernonieae)

Structural Heterozygosity for Reciprocal Translocations Affecting Chiasma Frequency and Pollen Fertility of a Natural Tetraploid of <i>Anthoxanthum odoratum</i> L. from Northwest Himalayas

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