Quantitative genetic analysis of flowering time in the Davis Population of gerbera. I. Components of genetic variance and heritability

Euphytica ◽  
1991 ◽  
Vol 53 (1) ◽  
pp. 19-23 ◽  
Author(s):  
Yiran Yu ◽  
Thomas Byrne ◽  
James Harding
Euphytica ◽  
1993 ◽  
Vol 70 (1-2) ◽  
pp. 97-103 ◽  
Author(s):  
Yiran Yu ◽  
James Harding ◽  
Thomas Byrne

1986 ◽  
Vol 28 (4) ◽  
pp. 563-567 ◽  
Author(s):  
G. P. Kadkol ◽  
G. M. Halloran ◽  
R. H. Macmillan

Quantitative genetic analysis of siliqua strength in Brassica campestris L. was conducted in the cross cv. Torch × DS-17-D using the North Carolina experiment II design. This revealed the presence of a high degree of nonadditive genetic variance and a high heritability (broad sense) for all measures of siliqua strength. These results are in accordance with earlier findings of the likelihood of a small number of genes controlling siliqua strength which interact epistatically.Key words: siliqua strength, shatter resistance, genetic variances (additive and nonadditive), heritability.


Genetics ◽  
2001 ◽  
Vol 158 (2) ◽  
pp. 833-841 ◽  
Author(s):  
Douglas R Taylor ◽  
Matthew S Olson ◽  
David E McCauley

Abstract Gynodioecy, the coexistence of functionally female and hermaphroditic morphs within plant populations, often has a complicated genetic basis involving several cytoplasmic male-sterility factors and nuclear restorers. This complexity has made it difficult to study the genetics and evolution of gynodioecy in natural populations. We use a quantitative genetic analysis of crosses within and among populations of Silene vulgaris to partition genetic variance for sex expression into nuclear and cytoplasmic components. We also use mitochondrial markers to determine whether cytoplasmic effects on sex expression can be traced to mitochondrial variance. Cytoplasmic variation and epistatic interactions between nuclear and cytoplasmic loci accounted for a significant portion of the variation in sex expression among the crosses. Source population also accounted for a significant portion of the sex ratio variation. Crosses among populations greatly enhanced the dam (cytoplasmic) effect, indicating that most among-population variance was at cytoplasmic loci. This is supported by the large among-population variance in the frequency of mitochondrial haplotypes, which also accounted for a significant portion of the sex ratio variance in our data. We discuss the similarities between the population structure we observed at loci that influence sex expression and previous work on putatively neutral loci, as well as the implications this has for what mechanisms may create and maintain population structure at loci that are influenced by natural selection.


2004 ◽  
Vol 12 (10) ◽  
pp. 1652-1657 ◽  
Author(s):  
M. Elizabeth Tejero ◽  
J. Michael Proffitt ◽  
Shelley A. Cole ◽  
Jeanne H. Freeland-Graves ◽  
Guowen Cai ◽  
...  

2016 ◽  
Vol 48 (1) ◽  
Author(s):  
Smaragda Tsairidou ◽  
Susan Brotherstone ◽  
Mike Coffey ◽  
Stephen C. Bishop ◽  
John A. Woolliams

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