Phenotyping cotton ovule fibre initiation with spatial statistics

Lovell, D. R., Wu, Y., White, R., Machado, A., Llewellyn, D. J., Dennis, E. S., & Anderssen, R. S. (2007) Phenotyping cotton ovule fibre initiation with spatial statistics. Australian Journal of Botany, 55(6), pp. 608-617.

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Yield in cultivated cotton (Gossypium spp.) is affected by the number and distribution of fibres initiated on the seed surface but, apart from simple statistical summaries, little has been done to assess this phenotype quantitatively. Here we use two types of spatial statistics to describe and quantify differences in patterning of cotton ovule fibre initials (FI). The following five different species of Gossypium were analysed: G. hirsutum L., G. barbadense L., G. arboreum, G. raimondii Ulbrich. and G. trilobum (DC.) Skovsted. Scanning electron micrographs of FIs were taken on the day of anthesis. Cell centres for fibre and epidermal cells were digitised and analysed by spatial statistics methods appropriate for marked point processes and tessellations. Results were consistent with previously published reports of fibre number and spacing. However, it was shown that the spatial distributions of FIs in all of species examined exhibit regularity, and are not completely random as previously implied. The regular arrangement indicates FIs do not appear independently of each other and we surmise there may be some form of mutual inhibition specifying fibre-initial development. It is concluded that genetic control of FIs differs from that of stomata, another well studied plant idioblast. Since spatial statistics show clear species differences in the distribution of FIs within this genus, they provide a useful method for phenotyping cotton. © CSIRO 2007.

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ID Code: 79861
Item Type: Journal Article
Refereed: Yes
Keywords: cotton, crop yield, cultivation, phenotype, spatial distribution, spatial variation, Gossypium, Gossypium arboreum, Gossypium barbadense, Gossypium hirsutum, Gossypium raimondii, Gossypium trilobum
DOI: 10.1071/BT07003
ISSN: 0067-1924
Subjects: Australian and New Zealand Standard Research Classification > BIOLOGICAL SCIENCES (060000) > ECOLOGY (060200)
Australian and New Zealand Standard Research Classification > BIOLOGICAL SCIENCES (060000) > MICROBIOLOGY (060500)
Australian and New Zealand Standard Research Classification > BIOLOGICAL SCIENCES (060000) > PLANT BIOLOGY (060700)
Divisions: Current > Schools > School of Electrical Engineering & Computer Science
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: CSIRO
Deposited On: 07 Jan 2015 04:15
Last Modified: 21 Jan 2015 04:43

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