&lt;i&gt;Foeniculum vulgare&lt;/i&gt;: Polyploidy, Translocation Heterozygosity and Pollen Variability

Raghuvanshi, S. S.; Joshi, Sheila

doi:10.1508/cytologia.31.43

Cited by 16 publications

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“…Low mul tivalent frequency was reported by Raghuvanshi and Joshi (1966) in Foeniculum vulgare and Joshi and Raghuvanshi (1967) in Anethum graveolens. In Coriandrum sativum also high bivalent frequency was observed (Joshi and Raghuvanshi 1965) .…”

mentioning

confidence: 91%

“…Increase in size and number of floral parts has no doubt enhanced the beauty of the tetraploids. Besides this polyploid breeding has been quite successful in other ornamentals like Torenia fournieri (Joshi and Raghuvanshi 1966), Catharanthus roseus and Tabernaemontana divaricata (Raghuvanshi and Chauhan 1969a, b, 1971and 1972, Arrhostoxylum elegans, Tropaeolum majus and Phlox drummondii (Rag huvanshi and Pathak 1977, 1975and 1974 and Thunbergia alata (Singh 1977).…”

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confidence: 99%

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Polyploid breeding in Portulaca grandiflora L.

Singh¹

1979

CYTOLOGIA

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confidence: 91%

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confidence: 99%

Polyploid breeding in Portulaca grandiflora L.

Singh¹

1979

CYTOLOGIA

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“…Plusieurs auteurs ont deja signale ! 'obtention de plantes de fenouil tetraploi'des ou mixoplo'ides a pres application de colchicine sur des apex de plantules ( Raghuvanshi et Joshi, 1966, 1967Joshi, 1968;Biswas et Chatterji, 1971 ;Hore, 1972). Raghuvanshi et Joshi ( 1966,196 7) et Joshi ( 1968) ont constate sur leurs tetraploi'des de nombreuses aberrations de Ia meiose male aboutissant a Ia formation de micronoyaux et de microspores surnumeraires.…”

Section: Discussion Et Conclusionunclassified

“…Le nombre de tetrades "normales" a quatre tetraspores produites par ce clone ( 75 %) est toutefois nettement superieur a celui note par Joshi ( 1968) (4 7,3%). La formation par les tetraplo'ides et les mixoploi'des de differents types de grains de pollen, dont une population dominante de grains tetralobes comparables a ceux que nous avons observes, a aussi ete signalee par ces auteurs (Raghuvanshi et Joshi, 1967 ;Joshi, 1968 ). Joshi ( 1968) a, par ailleurs, constate Ia production de tels grains par l'une des plantes traitees par Ia colchicine mais restee diploi'de, ce qui suggere que ces aberrations pourraient etre independantes de Ia polyploi'disation et liees a un effet secondaire de Ia colchicine.…”

Section: Discussion Et Conclusionunclassified

Tétraploïdisation du fenouil (Foeniculum vulgareMiller) par application de colchicine à une suspension cellulaire embryogène

Hunault

1997

Acta Botanica Gallica

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Resume.-Le traitement par Ia colchicine d'une suspension cellulaire embryogene de fenouil amer a permis d'obtenir des plantes tetraplo"ides de cette espece. Huit individus eutetraplo"ides (2n = 4x = 44) ont ete isoles et clones. Ce traitement a egalement induit !'apparition de plantes aneutetraplo"ides a 43 chromosomes et de plantes mixoplo"ides constituees de cellules a 2x et 4x. Les plantes eutetraplo"ides son! capables de fructifier et d'engendrer une descendance elle-meme tetraplo"ide. Le pollen de ces polyplo"ides presente une morphologie inhabituelle et possede souvent quatre lobes disposes en tetraedre. Summary.-Tetraploid bitter fennel plants [Foeniculum vulgare Miller subsp.capil/aceum (Gilib.) Holmboe var. vulgare (Miller) Thellung] have been obtained following treatment of an embryogenic cell suspension with 0,05 % colchicine for 24 h or 48 h. Eight eutetraploid plant (2n = 4x = 44) have been regenerated and further micropropagated in vitro. Several aneutetraploid plants with 43 chromosomes and mixoploid plants constituted of 2x and 4x cells were also regenerated from 48 h treated cells. Eutetraploids produced some fruit when field grown. Their progeny was also eutetraploid. Most pollen grains of tetraploid plants exhibited an unusual morphology, often having four lobes arranged tetraedrally.

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“…Walters (1958) mentions that aberrant spindles occur at meiosis in plants in which a large number of univalents are present. Raghuvanshi and Joshi (1966) have reported their occurrence in plants containing regularly paired chromosomes. In the present case, the number of univalents at least at first division is low and rarely exceeds three.…”

Section: Discussionmentioning

confidence: 99%

Investigations into Causes of Sterility

Kaul

1971

CYTOLOGIA

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Vicia faba L. plants were treated with three gametocides namely 2, 2 -dichloropropionic acid (Dalapon), sodium 2, 3-dichloroisobutyrate (Mendok) and 1, 2-dihydropyridazine 3, 6-dione (Maleic hydrazide), with an aim of inducing pollen sterility. Various concentrations of these gametocides were applied as aqueous foliar sprays at several stages of plant growth.Of the various applications of these gametocides tried, only 2, 2-dichloropropionic acid at 0.3 per cent and sodium 2, 3-dichloroisobutyrate at 0.25 and 0.4 per cent levels were found to be capable of causing complete pollen abortion. In order to determine the exact stage at which pollen abortion is caused by these gametocides, meiosis was studied in 2, 2-dichloropropionic acid and sodium 2, 3-dichloroisobutyrate-treated plants and their controls. It has been observed that while the former gametocide brings about a variety of meiotic irregularities, latter does not do so. The following pages bear the details of meiosis in untreated and 2, 2-dichloropropionic acid-induced male sterile plants. Material and methods Flower buds from untreated and 0.3 per cent 2, 2-dichloropropionic acid treated plants were harvested and fixed at comparable stages of development in acetic-alcohol (1:3) with acetic acid component saturated with ferric acetate. Following overnight fixation the buds were transferred to 70 per cent alcohol. Pollen mother cells were squashed in 0.5 per cent acetocarmine.All observations and microphotographs were made from temporary preparations, while only a few slides were made permanent for future record, by passing through acetic acid-tertiary-butyl alcohol series. Observations Meiosis in untreated plantsEarly prophase chromosomes consisting of differentially stained segments kept overlapped and were, therefore, not countable. Meiotic chromosomes could, however, be best studied at diakinesis, prometaphase and metaphase stages (Figs. 1, 2). At all these stages, six bivalents with varying number of

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<i>Foeniculum vulgare</i>: Polyploidy, Translocation Heterozygosity and Pollen Variability

Cited by 16 publications

References 20 publications

Polyploid breeding in Portulaca grandiflora L.

Polyploid breeding in Portulaca grandiflora L.

Tétraploïdisation du fenouil (Foeniculum vulgareMiller) par application de colchicine à une suspension cellulaire embryogène

Investigations into Causes of Sterility

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