Sex modification in Actinidia deliciosa var. deliciosa

Marchetti, Stefano; Zampa, C.; Chiesa, F.

doi:10.1007/bf00046050

Cited by 9 publications

(3 citation statements)

References 18 publications

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“…This reduces the chance of making a cross with yield advantage of the hybrid over its female parent. Sex modification in plants can often be achieved by application of plant growth regulators (Das and Mukherjee 1986;Marchetti et al 1992). The critical role of exogenous and endogenous growth regulators such as cytokinins, gibberellins, ethylene and auxins on plant sex determination has been investigated in various plant systems, like Mecurialis spp.…”

Section: Introductionmentioning

confidence: 99%

Yield improvement through female homosexual hybrids and sex genetics of sweet gourd (Momordica cochinchinensis Spreng.)

et al. 2011

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The present research aimed to evaluate the effect of silver nitrate (AgNO 3 ) on sex modification in sweet gourd (Momordica cochinchinensis Spreng.), and to explore the possibility of sexual crossing between two genetically female plants. Spray applications of AgNO 3 on 30 days' old female plants induced hermaphrodite flowers. Male plants were insensitive to the AgNO 3 sprays. Application of 500 mg/l AgNO 3 on female plants produced the maximum proportion of induced hermaphrodite flowers. Hermaphrodite flowers appeared 17-21 days after AgNO 3 spray and continued up to 8-17 days, depending upon the concentration of AgNO 3 . Pollen grain viability of induced hermaphrodite flowers (93.5%) was similar to pollen grain viability of normal male (95.0%) flowers. Because of higher fruit weight, progenies from female homosexual cross recorded higher yield. The hybrids from such crosses produced only female plants while the hybrids between female and normal male segregated into male and female in an equal proportion, indicating that sex in sweet gourd is controlled by a single factor, male being heterozygous and female being homozygous recessive. Through this technique, elite characters of female genotypes could be combined into a single plant.

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Section: Introductionmentioning

confidence: 99%

Yield improvement through female homosexual hybrids and sex genetics of sweet gourd (Momordica cochinchinensis Spreng.)

et al. 2011

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“…Pistils that develop embryos before anthers reach anthesis may be able to halt abscission and so be able to develop their fruit to maturity. If this scenario is true, treating flowers on male Z. americanum plants with gibberellins or other chemicals known to feminize staminate flowers in other species or inhibit fruit drop may raise the hermaphrodism rate in male Z. americanum (Ainsworth, 2000;Chailakhyan, 1979;Heslop-Harrison, 1956;Marchetti, et al, 1992;Pozo, 2001).…”

Section: Discussionmentioning

confidence: 99%

Reproductive Biology in Northern Prickly Ash

Munter

Luby²,

Anderson³

2018

J. Amer. Soc. Hort. Sci.

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Zanthoxylum americanum is a common understory species in the northern forests of Minnesota and surrounding regions. It has potential economic importance for its citrus fragrance, pharmacological or insecticidal properties, and produces peppercorns similar to those of the related Zanthoxylum species. Zanthoxylum americanum is a dioecious species but has been reported to have aberrant flowers with autonomous apomixis instead of other potential reproductive barriers. The reproductive biology of Zanthoxylum americanum was investigated in two native Minnesota populations. Determinations of male fertility, whether autonomous apomixis was the predominant floral reproductive mechanism, the presence of seedless fruit (parthenocarpy/stenospermocarpy), and the occurrence of hermaphrodism were made over 2 years. Sex ratios (female:male plants) within each population differed. The mean pollen stainability was 95.8% ± 0.3% (fresh) and 78.6% ± 1.1% (stored 18 months). Parthenocarpy did not occur in either population. Autonomous apomixis was not the primary floral reproductive mechanism. Stenospermocarpy (seedlessness) occurred in 13% of the female fruit clusters. Although commonly described as being dioecious, two additional reproductive strategies were identified: 1) plants with functional protandrous flowers with rudimentary pistils and 2) hermaphroditic flowers with fully functional pistils (protogynous) and anthers. As many as 10% to 30% of the male plants bore at least one fruit/plant each year. One clonal stand had both hermaphroditic and functionally staminate flowers on the same plant. Two evolutionary pathways to dioecy in Z. americanum are proposed.

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“…Sex modification in plants can often be achieved by application of plant growth regulators (Das and Mukherjee, 1986;Marchetti et al, 1992). Ethylene is the principal hormone regulating sex expression in the Cucurbitaceae family.…”

Section: Introductionmentioning

confidence: 99%

Hermaphrodite Flower Induction by Silver Nitrate (AgNO<sub>3</sub>) Application and Possibility of Crossbreeding in Pointed Gourd (<i>Trichosanthes dioica</i> Roxb.)

Hassan

Miyajima

2019

Hortic J

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This study aimed to reveal the effect of silver nitrate on sex modification in dioecious pointed gourd (Trichosanthes dioica Roxb.) originated in South Asia, and to explore the possibility of crossing among female plants. Three concentrations (50, 100, and 200 ppm) of silver nitrate were applied as foliar spray on female vines of three pointed gourd accessions. Application of 50 ppm silver nitrate found as effect to induce maximum proportion of hermaphrodite flowers with expanded duration irrespective of genotypes. The percentage of hermaphrodite flower induction was decreased with the increase of silver nitrate concentration. Viability of pollen grain (92.6-94.0%) in 100 ppm silver nitrate induced hermaphrodite flowers were as similar as that of normal male flowers (95.3%). Crossing among different female genotypes with pollen taken from the induced hermaphrodite flowers, produced same size of fruits of normal crossing. Seeds obtained from such crossing germinated successfully and seedlings grew vigorously as that of normal seeds. This technique seems to be useful for crossings among female plants that have suitable characters and facilitate a breeding of new variety in pointed gourd.

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Sex modification in Actinidia deliciosa var. deliciosa

Cited by 9 publications

References 18 publications

Yield improvement through female homosexual hybrids and sex genetics of sweet gourd (Momordica cochinchinensis Spreng.)

Yield improvement through female homosexual hybrids and sex genetics of sweet gourd (Momordica cochinchinensis Spreng.)

Reproductive Biology in Northern Prickly Ash

Hermaphrodite Flower Induction by Silver Nitrate (AgNO<sub>3</sub>) Application and Possibility of Crossbreeding in Pointed Gourd (<i>Trichosanthes dioica</i> Roxb.)

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