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Differentiation in the genetic basis of stem trichome development between cultivated tetraploid cotton species
- Source :
- BMC Plant Biology, Vol 21, Iss 1, Pp 1-14 (2021), BMC Plant Biology
- Publication Year :
- 2021
- Publisher :
- Springer Science and Business Media LLC, 2021.
-
Abstract
- BackgroundCotton stem trichomes and seed fibers are each single celled structures formed by protrusions of epidermal cells, and were found sharing the overlapping molecular mechanism. Compared with fibers, cotton stem trichomes are more easily observed, but the molecular mechanisms underlying their development are still poorly understood.ResultsIn this study,Gossypium hirsutum(Gh) andG. barbadense(Gb)were found to differ greatly in percentages of varieties/accessions with glabrous stems and in trichome density, length, and number per trichopore.Ghvarieties normally had long singular and clustered trichomes, whileGbvarieties had short clustered trichomes. Genetic mapping using five F2populations from crosses between glabrous varieties and those with different types of stem trichomes revealed that much variation among stem trichome phenotypes could be accounted for by different combinations of genes/alleles on Chr. 06 and Chr. 24. The twenty- six F1generations from crosses between varieties with different types of trichomes had varied phenotypes, further suggesting that the trichomes of tetraploid cotton were controlled by different genes/alleles. Compared to modern varieties, a greater proportion ofGhwild accessions were glabrous or had shorter and denser trichomes; whereas a smaller proportion ofGbprimitive accessions had glabrous stems. A close correlation between fuzz fiber number and stem trichome density was observed in bothGhandGbprimitive accessions and modern varieties.ConclusionBased on these findings, we hypothesize that stem trichomes evolved in parallel with seed fibers during the domestication of cultivated tetraploid cotton. In addition, the current results illustrated that stem trichome can be used as a morphological index of fiber quality in cotton conventional breeding.
- Subjects :
- Crops, Agricultural
Stem trichome
0106 biological sciences
0301 basic medicine
Genetic Speciation
Genetic mapping
Cotton
Plant Science
Biology
01 natural sciences
Gossypium hirsutum
03 medical and health sciences
Species Specificity
Gene mapping
lcsh:Botany
Botany
Cotton Fiber
Allele
Seed fiber
Domestication
Crosses, Genetic
Gossypium
Plant Stems
Parallel evolution
Correlation analysis
Trichomes
Biological Evolution
Phenotype
Trichome
lcsh:QK1-989
Tetraploidy
030104 developmental biology
Molecular mechanism
Research Article
010606 plant biology & botany
Subjects
Details
- ISSN :
- 14712229
- Volume :
- 21
- Database :
- OpenAIRE
- Journal :
- BMC Plant Biology
- Accession number :
- edsair.doi.dedup.....3e3faa5de84c40c1610177ca53403f6f