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The genetics of rhizosheath size in a multiparent mapping population of wheat.

Delhaize E, Rathjen TM, Cavanagh CR - J. Exp. Bot. (2015)

Bottom Line: Members of the basic helix-loop-helix family of transcription factors have previously been identified to regulate root hair length in Arabidopsis and rice.Since several wheat members of the basic helix-loop-helix family of genes are located within or near the QTL, these genes are candidates for controlling the long root hair trait.The QTL for rhizosheath size identified in this study provides the opportunity to implement marker-assisted selection to increase root hair length for improved phosphate acquisition in wheat.

View Article: PubMed Central - PubMed

Affiliation: CSIRO Agriculture, GPO Box 1600, Canberra, ACT 2601, Australia delhaize@csiro.au.

No MeSH data available.


Related in: MedlinePlus

(A) Rhizosheath size is correlated with root hair length in the MAGIC 4-way lines. Rescreen of the MAGIC 4-way lines with six large (black bars) and six small rhizosheath lines (white bars) identified from Fig. 2A. All lines were screened together with six replicates for each line and included parental and reference lines (grey bars). The least significant difference (LSD) for P=0.05 is shown. (B). Relationship between root hair length and rhizosheath size plotting values for each individual seedling. (C) Relationship between root hair length and rhizosheath size plotting mean values for each line (n=6 for each line, error bars indicate standard errors in both directions).
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Figure 3: (A) Rhizosheath size is correlated with root hair length in the MAGIC 4-way lines. Rescreen of the MAGIC 4-way lines with six large (black bars) and six small rhizosheath lines (white bars) identified from Fig. 2A. All lines were screened together with six replicates for each line and included parental and reference lines (grey bars). The least significant difference (LSD) for P=0.05 is shown. (B). Relationship between root hair length and rhizosheath size plotting values for each individual seedling. (C) Relationship between root hair length and rhizosheath size plotting mean values for each line (n=6 for each line, error bars indicate standard errors in both directions).

Mentions: To assess the reproducibility of the rhizosheath assay, lines selected within the tails of the distribution curves were re-assayed. For both populations, the re-assay showed that the small rhizosheath selections were well separated from the large rhizosheath selections with parental lines generally intermediate between these two groups (Figs 3A, 4A). The relationship between root hair length and rhizosheath size was determined by taking root segments for root hair measurements from the same plants that had been measured for rhizosheath size. Plotting the data derived from individual plants showed a significant relationship for both populations with coefficients of determination (r2) of 0.41 and 0.51 (Figs 3B, 4B). This relationship was further strengthened when the mean values for rhizosheath and root hair length for each line were plotted with r2 increasing to 0.74 and 0.81 (Figs 3C, 4C).


The genetics of rhizosheath size in a multiparent mapping population of wheat.

Delhaize E, Rathjen TM, Cavanagh CR - J. Exp. Bot. (2015)

(A) Rhizosheath size is correlated with root hair length in the MAGIC 4-way lines. Rescreen of the MAGIC 4-way lines with six large (black bars) and six small rhizosheath lines (white bars) identified from Fig. 2A. All lines were screened together with six replicates for each line and included parental and reference lines (grey bars). The least significant difference (LSD) for P=0.05 is shown. (B). Relationship between root hair length and rhizosheath size plotting values for each individual seedling. (C) Relationship between root hair length and rhizosheath size plotting mean values for each line (n=6 for each line, error bars indicate standard errors in both directions).
© Copyright Policy - creative-commons
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4507764&req=5

Figure 3: (A) Rhizosheath size is correlated with root hair length in the MAGIC 4-way lines. Rescreen of the MAGIC 4-way lines with six large (black bars) and six small rhizosheath lines (white bars) identified from Fig. 2A. All lines were screened together with six replicates for each line and included parental and reference lines (grey bars). The least significant difference (LSD) for P=0.05 is shown. (B). Relationship between root hair length and rhizosheath size plotting values for each individual seedling. (C) Relationship between root hair length and rhizosheath size plotting mean values for each line (n=6 for each line, error bars indicate standard errors in both directions).
Mentions: To assess the reproducibility of the rhizosheath assay, lines selected within the tails of the distribution curves were re-assayed. For both populations, the re-assay showed that the small rhizosheath selections were well separated from the large rhizosheath selections with parental lines generally intermediate between these two groups (Figs 3A, 4A). The relationship between root hair length and rhizosheath size was determined by taking root segments for root hair measurements from the same plants that had been measured for rhizosheath size. Plotting the data derived from individual plants showed a significant relationship for both populations with coefficients of determination (r2) of 0.41 and 0.51 (Figs 3B, 4B). This relationship was further strengthened when the mean values for rhizosheath and root hair length for each line were plotted with r2 increasing to 0.74 and 0.81 (Figs 3C, 4C).

Bottom Line: Members of the basic helix-loop-helix family of transcription factors have previously been identified to regulate root hair length in Arabidopsis and rice.Since several wheat members of the basic helix-loop-helix family of genes are located within or near the QTL, these genes are candidates for controlling the long root hair trait.The QTL for rhizosheath size identified in this study provides the opportunity to implement marker-assisted selection to increase root hair length for improved phosphate acquisition in wheat.

View Article: PubMed Central - PubMed

Affiliation: CSIRO Agriculture, GPO Box 1600, Canberra, ACT 2601, Australia delhaize@csiro.au.

No MeSH data available.


Related in: MedlinePlus