Fertility and effective population size in seedling seed orchards of Casuarina equisetifolia and C-junghuhniana. Varghese, M., Lindgren, D., & Nicodemus, A. Silvae Genetica, 53(4):164–168, 2004. Place: Warsaw Publisher: Sciendo WOS:000228214100005doi abstract bibtex Two seedling seed orchards each of C. equisetifolia and C. junghuhniana established by thinning provenance trials in coastal and inland locations in South India were evaluated for sex expression and fertility variation at four years. More than 80% of the trees in C. equisetifolia orchards were fertile in both sites with a similar pattern of more (almost 2 times) female trees and equal proportion of monoecious and non-flowering trees. In C. junghuhniana, the coastal orchard had twice the proportion of fertile trees as that of the inland. Orchards established in coastal environment had less fertility variation and hence maintained lower coancestry values in both species. Coastal site has more trees contributing effectively to seed production than inland locations and the orchards maintain higher (almost two times) effective population sizes. Genetic drift is also 3 times higher in inland locations in both species. Male and female trees in inland orchards of both species however had greater reproductive output than coastal trees. Monoecious Casuarina equisetifolia trees showed a different trend of greater male fertility in coastal site, but seed output was the same in both locations. Gene diversity values of all orchards are high though it is marginally higher in coastal sites. Measures like constrained seed collection from large number of trees and promoting representation of superior provenances with low fertility would be useful in checking diversity loss during domestication.
@article{varghese_fertility_2004,
title = {Fertility and effective population size in seedling seed orchards of {Casuarina} equisetifolia and {C}-junghuhniana},
volume = {53},
issn = {0037-5349},
doi = {10/gkzpmq},
abstract = {Two seedling seed orchards each of C. equisetifolia and C. junghuhniana established by thinning provenance trials in coastal and inland locations in South India were evaluated for sex expression and fertility variation at four years. More than 80\% of the trees in C. equisetifolia orchards were fertile in both sites with a similar pattern of more (almost 2 times) female trees and equal proportion of monoecious and non-flowering trees. In C. junghuhniana, the coastal orchard had twice the proportion of fertile trees as that of the inland. Orchards established in coastal environment had less fertility variation and hence maintained lower coancestry values in both species. Coastal site has more trees contributing effectively to seed production than inland locations and the orchards maintain higher (almost two times) effective population sizes. Genetic drift is also 3 times higher in inland locations in both species. Male and female trees in inland orchards of both species however had greater reproductive output than coastal trees. Monoecious Casuarina equisetifolia trees showed a different trend of greater male fertility in coastal site, but seed output was the same in both locations. Gene diversity values of all orchards are high though it is marginally higher in coastal sites. Measures like constrained seed collection from large number of trees and promoting representation of superior provenances with low fertility would be useful in checking diversity loss during domestication.},
language = {English},
number = {4},
journal = {Silvae Genetica},
author = {Varghese, M. and Lindgren, D. and Nicodemus, A.},
year = {2004},
note = {Place: Warsaw
Publisher: Sciendo
WOS:000228214100005},
keywords = {breeding population, coancestry, gene diversity, number, provenance trial, relatedness, relative status number, seed orchard},
pages = {164--168},
}
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In C. junghuhniana, the coastal orchard had twice the proportion of fertile trees as that of the inland. Orchards established in coastal environment had less fertility variation and hence maintained lower coancestry values in both species. Coastal site has more trees contributing effectively to seed production than inland locations and the orchards maintain higher (almost two times) effective population sizes. Genetic drift is also 3 times higher in inland locations in both species. Male and female trees in inland orchards of both species however had greater reproductive output than coastal trees. Monoecious Casuarina equisetifolia trees showed a different trend of greater male fertility in coastal site, but seed output was the same in both locations. Gene diversity values of all orchards are high though it is marginally higher in coastal sites. 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More than 80\\% of the trees in C. equisetifolia orchards were fertile in both sites with a similar pattern of more (almost 2 times) female trees and equal proportion of monoecious and non-flowering trees. In C. junghuhniana, the coastal orchard had twice the proportion of fertile trees as that of the inland. Orchards established in coastal environment had less fertility variation and hence maintained lower coancestry values in both species. Coastal site has more trees contributing effectively to seed production than inland locations and the orchards maintain higher (almost two times) effective population sizes. Genetic drift is also 3 times higher in inland locations in both species. Male and female trees in inland orchards of both species however had greater reproductive output than coastal trees. Monoecious Casuarina equisetifolia trees showed a different trend of greater male fertility in coastal site, but seed output was the same in both locations. 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Measures like constrained seed collection from large number of trees and promoting representation of superior provenances with low fertility would be useful in checking diversity loss during domestication.},\n\tlanguage = {English},\n\tnumber = {4},\n\tjournal = {Silvae Genetica},\n\tauthor = {Varghese, M. and Lindgren, D. and Nicodemus, A.},\n\tyear = {2004},\n\tnote = {Place: Warsaw\nPublisher: Sciendo\nWOS:000228214100005},\n\tkeywords = {breeding population, coancestry, gene diversity, number, provenance trial, relatedness, relative status number, seed orchard},\n\tpages = {164--168},\n}\n\n\n\n","author_short":["Varghese, M.","Lindgren, D.","Nicodemus, A."],"key":"varghese_fertility_2004","id":"varghese_fertility_2004","bibbaseid":"varghese-lindgren-nicodemus-fertilityandeffectivepopulationsizeinseedlingseedorchardsofcasuarinaequisetifoliaandcjunghuhniana-2004","role":"author","urls":{},"keyword":["breeding population","coancestry","gene diversity","number","provenance trial","relatedness","relative status number","seed orchard"],"metadata":{"authorlinks":{}}},"bibtype":"article","biburl":"https://bibbase.org/zotero/upscpub","dataSources":["9cGcv2t8pRzC92kzs","fvfkWcShg3Mybjoog","Tu3jPdZyJF3j547xT","3zTPPmKj8BiTcpc6C"],"keywords":["breeding population","coancestry","gene diversity","number","provenance trial","relatedness","relative status number","seed orchard"],"search_terms":["fertility","effective","population","size","seedling","seed","orchards","casuarina","equisetifolia","junghuhniana","varghese","lindgren","nicodemus"],"title":"Fertility and effective population size in seedling seed orchards of Casuarina equisetifolia and C-junghuhniana","year":2004}