Floral morphogenesis of Celtis species: implications for breeding system and reduced floral structure

2021 ◽  
Author(s):  
Flávia M. Leme ◽  
Yannick M. Staedler ◽  
Jürg Schönenberger ◽  
Simone P. Teixeira
Keyword(s):  
Breeding System ◽  
Floral Structure

Floral Morphology and Breeding System of Three Species of Eucalyptus, Section Bisectaria (Myrtaceae)

1992 ◽  
Vol 40 (3) ◽  
pp. 249 ◽  
Author(s):  
MF Ellis ◽  
M Sedgley
Keyword(s):  
Breeding System ◽  
No Reduction ◽  
Floral Morphology ◽  
Self Incompatibility ◽  
Floral Structure ◽  
Transmitting Tissue ◽  
Self Pollination ◽  
Low Levels ◽  
Ovule Penetration ◽  
Stigma Morphology

Aspects of the breeding system, floral morphology and pistil cytology were studied in three trees each of E. spathulata, E. cladocalyx and E. leptophylla. E. spathulata and E. leptophylla were found to be highly self incompatible, setting very low levels of seed from controlled self pollination. E. cladocalyx trees ranged from self compatible to self incompatible. Reductions were seen in both the number of capsules and the numbers of seeds per capsule, from self pollination. The mechanism of self incompatibility was investigated in the pistil by following the success of cross and self pollinations with fluorescence microscopy. In E. cladocalyx and E. leptophylla no reduction in ovule penetration was seen from self pollination while in E. spathulata a significant reduction was seen in two trees but not the third, indicating that the post-zygotic mechanism of self incompatibility operates in all three species, and with mixed pre-zygotic and post-zygotic mechanisms in E. spathulata. Floral architecture differed between the three species in the structure of the inflorescence units, flower morphology, and anther, pollen and ovule numbers per flower. Pistil cytology was similar for all three species but differed in the length of the stylar canal, degree of sclerotinisation, stigma morphology and volume of transmitting tissue. The implications of floral structure and of the location and extent of outcrossing control are discussed in relation to seed genotypes and seed output.

scholarly journals Is floral structure a reliable indicator of breeding system in the Brassicaceae?

PLoS ONE ◽  
2017 ◽  
Vol 12 (3) ◽  
pp. e0174176 ◽  
Author(s):  
Phillip A. Salisbury ◽  
Yvonne J. Fripp ◽  
Allison M. Gurung ◽  
Warren M. Williams
Keyword(s):  
Breeding System ◽  
Reliable Indicator ◽  
Floral Structure

The floral ecology and breeding system of Veratrum virginicum (Melanthiaceae)1

2020 ◽  
Vol 147 (3) ◽  
Author(s):  
Daniel Weiherer ◽  
Kayla Eckardt ◽  
Peter Bernhardt
Keyword(s):  
Breeding System ◽  
Floral Ecology

Effects of potato peel extract on semen quality, sex hormones and immunity of rabbit bucks under intensive breeding system

Andrologia ◽  
2020 ◽  
Vol 52 (11) ◽  
Author(s):  
Yassmine Moemen El‐Gindy ◽  
Salma Hashem Abu Hafsa ◽  
Waleed Mostafa Dosoky
Keyword(s):  
Sex Hormones ◽  
Breeding System ◽  
Semen Quality ◽  
Potato Peel ◽  
Peel Extract ◽  
Intensive Breeding

Floral structure of Mesanthemum radicans (Eriocaulaceae, Poales): morphological and anatomical novelties

2021 ◽  
Vol 139 ◽  
pp. 306-317
Author(s):  
Arthur de Lima Silva ◽  
Thomas Stützel ◽  
Marcelo Trovó ◽  
Alessandra Ike Coan
Keyword(s):  
Floral Structure

scholarly journals Discovery of a Possibly Relict Outbreeding Morphotype of Sparrow's-egg Lady's-slipper Orchid, Cypripedium passerinum, in Southwestern Yukon

2007 ◽  
Vol 121 (3) ◽  
pp. 295 ◽  
Author(s):  
Paul M. Catling ◽  
Bruce A. Bennett
Keyword(s):  
Breeding System ◽  
Widespread Occurrence ◽  
Slipper Orchid

An outbreeding morphotype of Cypripedium passerinum with separate anthers and stigma was discovered in the Beringian region of southwestern Yukon. The occurrence of this breeding system in Beringia is attributed to the persistent advantage of outbreeding over hundreds of thousands of years in this unglaciated area, whereas the widespread occurrence of exclusively self-pollinating races elsewhere in Canada is attributed to advantages in colonization of recently deglaciated territory which first became available less than 10,000 years ago, and/or to a changing and more forested habitat.

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