STRONG INBREEDING DEPRESSION IN TWO SCANDINAVIAN POPULATIONS OF THE SELF-INCOMPATIBLE PERENNIAL HERBARABIDOPSIS LYRATA

Evolution ◽  
2013 ◽  
pp. n/a-n/a ◽  
Author(s):  
Nina Sletvold ◽  
Mathilde Mousset ◽  
Jenny Hagenblad ◽  
Bengt Hansson ◽  
Jon Ågren
Keyword(s):  
Inbreeding Depression ◽  
The Self

scholarly journals Self-sterility May Be Due to Prezygotic Late-acting Self-incompatibility and Early-acting Inbreeding Depression in Chinese Chestnut

2019 ◽  
Vol 144 (3) ◽  
pp. 172-181 ◽  
Author(s):  
Huan Xiong ◽  
Feng Zou ◽  
Sujuan Guo ◽  
Deyi Yuan ◽  
Genhua Niu
Keyword(s):  
Inbreeding Depression ◽  
Fruit Set ◽  
Paraffin Section ◽  
Forest Tree ◽  
The Self ◽  
Self Incompatibility ◽  
Double Fertilization ◽  
Chinese Chestnut ◽  
Section Technique ◽  
Ovule Penetration

Chinese chestnut (Castanea mollissima), which is native to China, has been cultivated as a nontimber forest tree species for 4000 years. This species has been found to display self-sterility, which results in a significantly lower seed set following self-pollination (SP) compared with that following cross-pollination (CP). Self-sterility can be induced by prezygotic or postzygotic late-acting self-incompatibility (LSI) or early-acting inbreeding depression (EID). To elucidate the causes of self-sterility in chestnut, we investigated pollen–pistil interactions, fertilization, and early ovule development following SP and CP by using a paraffin section technique and fluorescence microscopy. The fruit set percentage and seed characteristics also were evaluated among different pollination treatments. The results show that there were no significant differences in pollen tube behavior following SP vs. CP, regardless of the stigmatic or stylar level. Double fertilization was significantly greater following CP (18.09%) than SP (2.58%). The significantly lower percentages of ovule penetration and double fertilization in the selfed vs. crossed ovules support a prezygotic LSI mechanism in C. mollissima. The fruit set resulting from chase-pollination (CHP; 53.85% to 63.64%) was greater than that resulting from SP (12.12% to 14.00%). In addition, the distribution of aborted seed sizes after SP showed a widely clumped pattern. Abortion occurred at different stages during seed development rather than at a uniform stage, which supported the idea that EID was operating in C. mollissima. Levels of self-sterility in the chinese chestnut trees ranged from 88.2% to 90.5%. Thus, partial prezygotic LSI and EID contributed to self-sterility in the C. mollissima ‘Yanshanzaofeng’, with prezygotic LSI rejecting part of the self-pollen in the ovary and EID aborting part of the self-fertilized seeds.

Analysis of inbreeding depression in the tea plant (Camellia sinensis) based on the self-compatible cultivar ‘Ziyan’

2021 ◽  
Vol 284 ◽  
pp. 110120
Author(s):  
Qin-Ling Liu ◽  
Xiao-Xiang Li ◽  
Yi-Han Xu ◽  
Liu-Bin Wang ◽  
Kai-Ling Chang ◽  
...  
Keyword(s):  
Inbreeding Depression ◽  
Camellia Sinensis ◽  
Tea Plant ◽  
The Self

scholarly journals The Ability of Spontaneous Autogamy in Four Orchid Species: Cephalanthera Rubra, Neottia Ovata, Gymnadenia Conopsea, and Platanthera Bifolia

2017 ◽  
Vol 59 (2) ◽  
pp. 51-61
Author(s):  
Izabela Tałałaj ◽  
Beata Ostrowiecka ◽  
Ewa Włostowska ◽  
Agnieszka Rutkowska ◽  
Emilia Brzosko
Keyword(s):  
Seed Development ◽  
Inbreeding Depression ◽  
Resource Limitation ◽  
The Self ◽  
Orchid Species ◽  
Gymnadenia Conopsea ◽  
Self Compatibility ◽  
High Level ◽  
Development Analysis ◽  
Study Species

AbstractThe breeding system in Orchidaceae generates many questions about the selfing potential of its representatives. We investigated the ability of spontaneous autogamy of four orchid species: Cephalanthera rubra and Neottia ovata of the Neottieae tribe and Gymnadenia conopsea and Platanthera bifolia of the Orchideae tribe. These species represent diverse specializations of the gynostemium architecture. The self-compatibility and properties of autogamous seeds were determined in a bagging experiment and seed development analysis. After induced autogamy, a high level of fruiting (80-100%) was noted in all of the four study species. C. rubra, N. ovata, and G. conopsea are completely self-compatible, and P. bifolia is suggested to be partially self-compatible. If autogamy occurred, inbreeding depression and resource limitation on seed development appeared only in the two Orchideae species. Independent of flower specialization, both Neottieae species and P. bifolia were completely allogamous, whereas G. conopsea could be facultatively autogamous.

Pollination of an invasive orchid, Cyrtopodium polyphyllum (Orchidaceae), by an invasive oil-collecting bee, Centris nitida, in southern Florida

Botany ◽  
2010 ◽  
Vol 88 (3) ◽  
pp. 290-295 ◽  
Author(s):  
Hong Liu ◽  
Robert Pemberton
Keyword(s):  
Inbreeding Depression ◽  
The Self ◽  
Native Range ◽  
Terrestrial Orchid ◽  
Invasive Range ◽  
Self Compatibility ◽  
Southern Florida

The lack of appropriate pollinators is believed to be an impediment to naturalization of orchids. We studied the self-compatibility and pollination of an invasive, showy, rewardless, terrestrial orchid ( Cyrtopodium polyphyllum (Vell.) Pabst ex F. Barrios) in southern Florida. Pollination treatments indicated that the orchid is self-compatible but not autogamous. Visitor observations indicated that the orchid is pollinated by an invasive specialist oil-collecting bee ( Centris nitida Smith). The presence of the invasive Centris nitida has probably contributed to the naturalization of this probable oil reward mimicking orchid in Florida. We contrasted our results in the orchid’s invasive range with those reported in two studies in the orchid’s native range. In the invasive range in Florida, the orchid experiences a lower inbreeding depression. In both areas, the orchid is pollinated by Centris species and the pollination of the orchid is apparently enhanced by the presence of oil-rewarding species of the Malpighiaceae.

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