scholarly journals Effect of Colchicine and Oryzalin Treatments on Tetraploid Production of Nucellar Embryos in Meiwa Kumquat (Fortunella crassifolia Swingle)

2004 ◽  
Vol 3 (1) ◽  
pp. 11-16 ◽  
Author(s):  
Masaki Yahata ◽  
Yukiko Kashihara ◽  
Hironori Kurogi ◽  
Hisato Kunitake ◽  
Haruki Komatsu
Keyword(s):  
Nucellar Embryos

scholarly journals The Confirmation of a Ploidy Periclinal Chimera of the Meiwa Kumquat (Fortunella crassifolia Swingle) Induced by Colchicine Treatment to Nucellar Embryos and Its Morphological Characteristics

Agronomy ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 562 ◽  
Author(s):  
Tsunaki Nukaya ◽  
Miki Sudo ◽  
Masaki Yahata ◽  
Tomohiro Ohta ◽  
Akiyoshi Tominaga ◽  
...  
Keyword(s):  
Ploidy Level ◽  
Sugar Content ◽  
Flow Cytometric Analysis ◽  
Morphological Characteristics ◽  
Colchicine Treatment ◽  
Reproductive Organs ◽  
Periclinal Chimera ◽  
High Sugar Content ◽  
Diploid Cells ◽  
Nucellar Embryos

A ploidy chimera of the Meiwa kumquat (Fortunella crassifolia Swingle), which had been induced by treating the nucellar embryos with colchicine, and had diploid (2n = 2x = 18) and tetraploid (2n = 4x = 36) cells, was examined for its ploidy level, morphological characteristics, and sizes of its cells in its leaves, flowers, and fruits to reveal the ploidy level of each histogenic layer. Furthermore, the chimera was crossed with the diploid kumquat to evaluate the ploidy level of its reproductive organs. The morphological characteristics and the sizes of the cells in the leaves, flowers, and fruits of the chimera were similar to those of the tetraploid Meiwa kumquat and the ploidy periclinal chimera known as “Yubeni,” with diploids in the histogenic layer I (L1) and tetraploids in the histogenic layer II (L2) and III (L3). However, the epidermis derived from the L1 of the chimera showed the same result as the diploid Meiwa kumquat in all organs and cells. The sexual organs derived from the L2 of the chimera were significantly larger than those of the diploid. Moreover, the ploidy level of the seedlings obtained from the chimera was mostly tetraploid. In the midrib derived from the L3, the chimera displayed the fluorescence intensity of a tetraploid by flow cytometric analysis and had the same size of the cells as the tetraploid and the Yubeni. According to these results, the chimera is thought to be a ploidy periclinal chimera with diploid cells in the outermost layer (L1) and tetraploid cells in the inner layers (L2 and L3) of the shoot apical meristem. The chimera had desirable fruit traits for a kumquat such as a thick pericarp, a high sugar content, and a small number of developed seeds. Furthermore, triploid progenies were obtained from reciprocal crosses between the chimera and diploid kumquat.

scholarly journals PROCUMBENT GROWTH HABIT CHARACTERIZED IN SEEDLINGS OF `CIPO' ORANGE

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 658g-659
Author(s):  
Kim D. Bowman
Keyword(s):  
Citrus Sinensis ◽  
Growth Habit ◽  
Sweet Orange ◽  
Tree Height ◽  
Tree Size ◽  
Tree Morphology ◽  
Hormone Research ◽  
Increased Sensitivity ◽  
Stem Structure ◽  
Nucellar Embryos

`Cipo' sweet orange [Citrus sinensis (L.) Osbeck] is distinctive among citrus selections because of reduced tree height and procumbent growth habit. Open-pollinated seeds were collected from `Cipo' orange and `Pineapple' sweet orange (C. sinensis) at Riverside, California, and grown under cool greenhouse conditions. Seedlings of `Cipo' were relatively uniform in morphology (including drooping shoot habit) and were presumed to be apomicts derived from nucellar embryos. `Cipo' seedlings were distinctly different from `Pineapple' in several characteristics, including smaller shoot altitude/extension ratios (a measure of uprightness) and broader stem-petiole angles (`Cipo' 1.33 radians; `Pineapple' 0.84 radians). The procumbent habit of `Cipo' appeared to be related to a preference for horizontal shoot orientation rather than a weakness of stem structure. Some increased sensitivity to ethylene was observed in the `Cipo' seedlings. `Cipo' is proposed as a resource for hormone research and a potential parent in breeding for unique tree morphology and reduced tree size.

Characteristics in autotetraploid kumquats (Fortunella spp.) induced by colchicine treatment to nucellar embryos and their utilization for triploid breeding

2019 ◽  
Vol 245 ◽  
pp. 210-217 ◽  
Author(s):  
Tsunaki Nukaya ◽  
Miki Sudo ◽  
Masaki Yahata ◽  
Yoshiyuki Nakajo ◽  
Tomohiro Ohta ◽  
...  
Keyword(s):  
Colchicine Treatment ◽  
Triploid Breeding ◽  
Nucellar Embryos

scholarly journals Characteristics in Polyploid Meiwa Kumquat (Fortunella crassifolia Swingle) Induced by Colchicine Treatment to Nucellar Embryos and Their Utilization for Triploid Breeding

2011 ◽  
Vol 10 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Tsunaki Nukaya ◽  
Tomohiro Ohta ◽  
Kiichi Yasuda ◽  
Masaki Yahata ◽  
Hisato Kunitake ◽  
...  
Keyword(s):  
Colchicine Treatment ◽  
Triploid Breeding ◽  
Nucellar Embryos

Effect of abscisic acid, osmolarity and temperature onin vitro development of recalcitrant mango nucellar embryos

1996 ◽  
Vol 44 (1) ◽  
pp. 53-61 ◽  
Author(s):  
Fernando Pliego-Alfaro ◽  
Richard E. Litz ◽  
Pamela A. Moon ◽  
Dennis J. Gray
Keyword(s):  
Abscisic Acid ◽  
Vitro Development ◽  
Nucellar Embryos
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