scholarly journals Habitat preference and flowering-time variation contribute to reproductive isolation between diploid and autotetraploid Anacamptis pyramidalis

2016 ◽  
Vol 29 (10) ◽  
pp. 2070-2082 ◽  
Author(s):  
L. Pegoraro ◽  
D. Cafasso ◽  
R. Rinaldi ◽  
S. Cozzolino ◽  
G. Scopece
Keyword(s):  
Reproductive Isolation ◽  
Flowering Time ◽  
Time Variation ◽  
Habitat Preference ◽  
Anacamptis Pyramidalis

scholarly journals A naturally occurring InDel variation in BraA.FLC.b (BrFLC2) associated with flowering time variation in Brassica rapa

2012 ◽  
Vol 12 (1) ◽  
pp. 151 ◽  
Author(s):  
Jian Wu ◽  
Keyun Wei ◽  
Feng Cheng ◽  
Shikai Li ◽  
Qian Wang ◽  
...  
Keyword(s):  
Flowering Time ◽  
Brassica Rapa ◽  
Time Variation ◽  
Naturally Occurring ◽  
Indel Variation

scholarly journals A genetic characterization of Korean waxy maize (Zea mays L.) landraces having flowering time variation by RNA sequencing

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Gibum Yi ◽  
Hosub Shin ◽  
Seung Hwa Yu ◽  
Jeong Eun Park ◽  
Taegu Kang ◽  
...  
Keyword(s):  
Flowering Time ◽  
Time Variation ◽  
Expression Profiles ◽  
Genetic Relationships ◽  
Gene Expression Profiles ◽  
Genetic Characteristics ◽  
Maize Germplasm ◽  
Nucleotide Sequence Level ◽  
Gene Profiles ◽  
Breeding Resources

AbstractMaize is the second-most produced crop in the Korean peninsula and has been continuously cultivated since the middle of the 16th century, when it was originally introduced from China. Even with this extensive cultivation history, the diversity and properties of Korean landraces have not been investigated at the nucleotide sequence level. We collected 12 landraces with various flowering times and performed RNA-seq in the early vegetative stage. The transcriptomes of 12 Korean landraces have been analyzed for their genetic variations in coding sequence and genetic relationships to other maize germplasm. The Korean landraces showed specific genetic characteristics and were closely related to a Chinese inbred line. Flowering-time related gene profiles pointed to multiple causes for the variation of flowering time within Korean landraces; the profiles revealed significant positive and negative correlations among genes, allowing us to infer possible mechanisms for flowering time variation in maize. Our results demonstrate the value of transcriptome-based genetic and gene expression profiles for information on possible breeding resources, which is particularly needed in Korean waxy landraces.

Components of Flowering Time Variation in a Desert Annual

Evolution ◽  
1990 ◽  
Vol 44 (6) ◽  
pp. 1404 ◽  
Author(s):  
Gordon A. Fox
Keyword(s):  
Flowering Time ◽  
Time Variation ◽  
Desert Annual

scholarly journals Speciation: more likely through a genetic or through a learned habitat preference?

2005 ◽  
Vol 272 (1571) ◽  
pp. 1455-1463 ◽  
Author(s):  
J.B Beltman ◽  
J.A.J Metz
Keyword(s):  
Reproductive Isolation ◽  
Habitat Preference ◽  
Sympatric Speciation ◽  
Genetic Mechanism ◽  
Dynamical Analysis ◽  
Disruptive Selection ◽  
Single Population ◽  
Preferred Habitat ◽  
Simultaneous Evolution ◽  
Evolution Proceeds

A problem in understanding sympatric speciation is establishing how reproductive isolation can arise when there is disruptive selection on an ecological trait. One of the solutions that has been proposed is that a habitat preference evolves, and that mates are chosen within the preferred habitat. We present a model where the habitat preference can evolve either by means of a genetic mechanism or by means of learning. Employing an adaptive-dynamical analysis, we show that evolution proceeds either to a single population of specialists with a genetic preference for their optimal habitat, or to a population of generalists without a habitat preference. The generalist population subsequently experiences disruptive selection. Learning promotes speciation because it increases the intensity of disruptive selection. An individual-based version of the model shows that, when loci are completely unlinked and learning confers little cost, the presence of disruptive selection most probably leads to speciation via the simultaneous evolution of a learned habitat preference. For high costs of learning, speciation is most likely to occur via the evolution of a genetic habitat preference. However, the latter only happens when the effect of mutations is large, or when there is linkage between genes coding for the different traits.

Sign in / Sign up

Export Citation Format

Share Document