Induced cytomictic diversity in maize (Zea mays L.) inbred

Kumar, Prashant; Kumar, Girjesh; Tripathi, Avinash C.

doi:10.3103/s0095452710060022

Cited by 4 publications

(6 citation statements)

References 21 publications

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“…Microsporogenesis is a genetically controlled physiological, biochemical, and morphological processes where the final product is a tetrad of haploid microspores. Numerous abnormalities of meiosis can occur in plants which can result in a loss of fertility and overall reproductive efficiency (Rai et al, 2010). The most common abnormality is irregular conjugation of chromosomes such as the occurrence of univalents in diakinesis or metaphase I.…”

Section: Introductionmentioning

confidence: 99%

Microsporogenesis and meiotic abnormalities in different ‘Oblačinska’ sour cherry (Prunus cerasus L.) clones

Akšić

Cerović

Erċışlı

et al. 2016

Flora

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The Oblačinska sour cherry (Prunus cerasus) is a mixture of different clones with similar tree and fruit characteristics that is indigenous to and widely planted in commercial orchards in Serbia. Sour cherry, including Oblačinska sour cherry clones, exhibits irregular meiosis which may contribute to low fruit set in some selections. The goal of this study was to examine the process of microsporogenesis and to determine if meiosis and its anomalies effect the in vitro pollen germination and pollen tube length in four 'Oblačinska' sour cherry clones that differ in fruit set and yields. All clones displayed varying degrees of chromosomal abnormalities in all meiosis sub-phases. The abnormalities became evident from late pachytene with more than half of the pollen mother cells (PMC) showing abnormal conjugation of chromosomes in metaphase I. The lowest number of PMCs with laggards was in clone III/9 and the highest in clone XIII/1. In second division, the univalent and multivalent association was observed at metaphase-II, the lagging and stickiness in anaphase-II, and the phenomenon persisted up to the microspore stage. In all four 'Oblačinska' clones, PMCs exhibited cytomixis phenomena, however, it was only observed in the second experimental year. Cytomixis differed among the four clones but was equally frequent in all stages of meiosis. The syncytia formed, most often consisted of 2-3 PMCs that were at the same phase of meiosis, and exhibited common cytoplasm and occasionally nuclear fusion. In vitro pollen germination and pollen tube length significantly differed between the clones. Most probably abnormalities during meiosis, regardless of the good results of pollen germination, influenced the reduced potential clones XI/3 and XIII/1.

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Section: Introductionmentioning

confidence: 99%

Microsporogenesis and meiotic abnormalities in different ‘Oblačinska’ sour cherry (Prunus cerasus L.) clones

Akšić

Cerović

Erċışlı

et al. 2016

Flora

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“…Cytomixis and spontaneous fusion of pollen mother cells are reported in number of angiosperm species such as Sorghum bicolor (Ghaffari, 1970), Nicotiana tobacum (Sidorchuk et al, 2007), Hippophae rhamnoides (Signal et al, 2008) Zea mays (Rai et al, 2010) but there is still lack of any published report of cytomixis in Sesbania cannabina.…”

Section: Introductionmentioning

confidence: 99%

“…A cytomixis has been considered to be the characterstic of genetically unbalanced plants such as hybrids, mutants and aneuploids (Peng et al, 2003;Rai et al, 2010;Zhou, 2003). Though it is an infrequent cytological phenomenon, but it has been reported in a large number of plants (Cheng et al, 1975;Gattschalk, 1970;Omara, 1976).…”

Section: Introductionmentioning

confidence: 99%

“…Some of the factors for induced cytomixis may be the action of colchicine (Ghaffari, 2006), action of herbicides (Boback and Herich, 1978), the partial or total inhibition of cytokinesis during microsporogenesis (Risueno et al, 1969), changes in biochemical processes that involve microsporogenesis modifying the microenvironment of affected anthers (Koul, 1990) and action of gamma rays (Rai et al, 2010), influence of gene (Bedi, 1990). …”

Section: Introductionmentioning

confidence: 99%

“…The steps involved in meiosis, controlled by a large array of genes may lead into cytological aberrations which result in a loss of fertility and overall reproductive efficiency of plants (Rai et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Characteristics of cytomixis in the pollen mother cells of green manure crop Sesbania cannabina

Kumar¹,

Srivastava²

2013

JCEA

Self Cite

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Cytomixis has been reported in many plant species, but there is no published report in Sesbania cannabina spp. The cytological stability of any plant is an important consideration in view of its extensive use in genetics and plant breeding programmes. Present study reveals the occurrence of inter PMC (pollen mother cell) transfer of chromatin material. During present investigation, it was found that out of different doses of gamma rays + ethylmethane sulfonate, the highest dose displayed the highest instances of cytomixis. In present investigation, the phenomenon of cytomixis can be observed between 2 to 10 PMCs. During male meiosis, it occurs through narrow and broad cytoplasmic channels or through direct contact between PMCs from early prophase to late telophase stage. However, the frequency of its occurrence during late meiotic stages is rather low. It elucidates that in Sesbania cannabina, induced cytomixis results into possible sources for production of aneuploids and polyploids. This may be further useful in plant breeding programmes to improve genotypic and phenotypic characters of Sesbania cannabina.

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Induction of apomixis and fixation of heterosis in Egyptian rice Hybrid1 line using colchicine mutagenesis

Gaafar

Shanshoury

Hisseiwy³

et al. 2017

Annals of Agricultural Sciences

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Induced cytomictic diversity in maize (Zea mays L.) inbred

Cited by 4 publications

References 21 publications

Microsporogenesis and meiotic abnormalities in different ‘Oblačinska’ sour cherry (Prunus cerasus L.) clones

Microsporogenesis and meiotic abnormalities in different ‘Oblačinska’ sour cherry (Prunus cerasus L.) clones

Characteristics of cytomixis in the pollen mother cells of green manure crop Sesbania cannabina

Induction of apomixis and fixation of heterosis in Egyptian rice Hybrid1 line using colchicine mutagenesis

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