The mentor pollen phenomenon in poplars: a new concept

1989 ◽  
Vol 78 (1) ◽  
pp. 129-135 ◽  
Author(s):  
M. Gaget ◽  
M. Villar ◽  
C. Dumas
Keyword(s):  
Mentor Pollen

Overcoming prefertilization barriers in the crossDiplotaxis siettiana * Brassica juncea using irradiated mentor pollen

1995 ◽  
Vol 37 (3) ◽  
pp. 329-334
Author(s):  
B. K. Sarmah ◽  
N. Sarla
Keyword(s):  
Brassica Juncea ◽  
Mentor Pollen

An efficient interspecific hybridisation protocol for Carica papaya L. × C. cauliflora Jacq.

1998 ◽  
Vol 38 (5) ◽  
pp. 523 ◽  
Author(s):  
P. M. Magdalita ◽  
R. A. Drew ◽  
I. D. Godwin ◽  
S. W. Adkins
Keyword(s):  
Interspecific Hybrid ◽  
Carica Papaya ◽  
Dichlorophenoxyacetic Acid ◽  
Gene Introgression ◽  
Interspecific Hybridisation ◽  
Papaya Ringspot Virus ◽  
Viable Pollen ◽  
Hybrid Plants ◽  
Mentor Pollen ◽  
2,4 Dichlorophenoxyacetic Acid

Summary. A protocol for interspecific hybridisation between Carica papaya and C. cauliflora is necessary for gene introgression between these 2 incompatible species. Carica papaya × C. cauliflora hybrids were successfully created using a new, efficient hybridisation protocol. This protocol includes the use of highly viable pollen of C. cauliflora produced during summer, autumn and/or spring, the use of an isolation time ranging from 90 to 120 days post-pollination of hybrid embryos, and the use of the most compatible C. papaya cultivar 2001 for crossing with C. cauliflora. Two types of interspecific hybrid embryos, namely single and multiple, were isolated in all resulting fruit. The application of gibberellic acid (0.6 or 0.8 mol/L) or 2,4- dichlorophenoxyacetic acid (1.5 or 2.0 mol/L) to freshly cross-pollinated flowers and pollination by mentor pollen did not promote either the rate of successful crosses or the production of hybrid embryos. Using this efficient protocol, hybridisation between C. papaya and C. cauliflora conducted in 3 locations in south-east Queensland produced 338 crosses which generated 43 736 seed. From these seed, 2100 hybrid embryos were recovered resulting in the production of 485 morphologically normal interspecific hybrid plants. Studies reported elsewhere show that these hybrids are resistant to papaya ringspot virus type P.

Irradiated Mentor Pollen: Its Use in Remote Hybridization of Black Cottonwood

Nature ◽  
1968 ◽  
Vol 219 (5155) ◽  
pp. 746-747 ◽  
Author(s):  
REINHARD F. STETTLER
Keyword(s):  
Black Cottonwood ◽  
Mentor Pollen ◽  
Remote Hybridization

Mentor pollen effect on the in-vivo germination of self-incompatible apple pollen

1984 ◽  
Vol 23 (4) ◽  
pp. 337-343 ◽  
Author(s):  
Patrizia Montalti ◽  
Nadia Filiti
Keyword(s):  
Mentor Pollen ◽  
Pollen Effect

The effects of gamma and laser rays on the functioning of apple pollen in pollination and mentor pollen experiments

1984 ◽  
Vol 59 (1) ◽  
pp. 57-61 ◽  
Author(s):  
M. Clara Marcucci ◽  
D. Ragazzini ◽  
S. Sansavini
Keyword(s):  
Mentor Pollen ◽  
Laser Rays

Fruit-set after pretreatment with foreign compared with killed compatible pollen

1984 ◽  
Vol 62 (8) ◽  
pp. 1678-1681 ◽  
Author(s):  
W. David Lane
Keyword(s):  
Sweet Cherry ◽  
Direct Evidence ◽  
Fruit Set ◽  
Growth Promotion ◽  
Mineral Analysis ◽  
Foreign Pollen ◽  
Mentor Pollen ◽  
Pollen Growth ◽  
Growth Promoting ◽  
Compatible Pollen

A mechanism based on pollen growth-promoting substances has previously been proposed to explain the effects of mentor (killed compatible) pollen when it improves fertility of crosses between nearly incompatible parents. Similarly, pioneer pollination (two pollinations a day apart) stimulates growth of the last applied pollen and increases fruit-set. In the present experiments the effects of foreign-pollen pioneer treatments on fruit-set of apple, sweet cherry, and apricot were compared with the control, killed compatible pollen. All treatments were followed 24 h later with viable compatible pollen. The foreign pollen, Balsamorrhiza sagittata, did not inhibit fruit-set. When the foreign pollen was heat killed, fruit-set was at least as high as when untreated B. sagittata was used. Two other foreign pollens, Taraxacum officinale and Juniperus communis, resulted in lower fruit-set than B. sagittata but still more than the control. This effect was consistent with a previously hypothesized relationship for mentor pollen, relating size and degree of stimulation. The two nonpollen treatments examined, dried yeast and pectinase solution, slightly inhibited fruit-set. Mineral analysis of a composite of pollen and anther tissue indicated that boron and calcium were not deficient in the control pollen, and incompatibility mechanisms and heat-labile metabolites also were unlikely to have been the cause. No direct evidence was obtained, but pollen growth promotion by a diffusible growth regulator (such as gibberellin) is suggested as plausible and an area worthy of further study.

Use of irradiated pollen as mentor pollen to induce self-fertilization of two self-incompatible Upper Amazon cacao clones

Euphytica ◽  
1990 ◽  
Vol 51 (3) ◽  
pp. 219-225 ◽  
Author(s):  
Y. Adu-Ampomah ◽  
F. J. Novak ◽  
G. Y. P. Klu ◽  
T. V. O. Lamptey
Keyword(s):  
Irradiated Pollen ◽  
Mentor Pollen ◽  
Self Fertilization
Sign in / Sign up

Export Citation Format

Share Document