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The effect of two QTLs for resistance to Meloidogyne incognita in cotton on nematode egression from roots

Journal of Nematology
Volume 52 (2020): Issue 1 (January 2020)
By:
Open Access
|Jan 2021

Figures & Tables

Figure 1:

Numbers of Meloidogyne incognita remaining inside roots, egressed from roots into the vermiculite, and total counts on four cotton isolines that differ in M. incognita-resistance genes in three experimental trials. DAI = days after inoculation. Different letters over bars within a sampling date indicate significant differences at α = 0.05. Bars with no letters showed no significant difference within a sampling date.
Numbers of Meloidogyne incognita remaining inside roots, egressed from roots into the vermiculite, and total counts on four cotton isolines that differ in M. incognita-resistance genes in three experimental trials. DAI = days after inoculation. Different letters over bars within a sampling date indicate significant differences at α = 0.05. Bars with no letters showed no significant difference within a sampling date.

Figure 2:

Percentage of Meloidogyne incognita inside and outside of the roots (egressed into the vermiculite) of four cotton isolines that differ in M. incognita-resistance genes in three experimental trials. DAI = days after inoculation. Different letters over bars within a sampling date indicate significant differences at α = 0.05. Bars with no letters showed no significant difference within a sampling date.
Percentage of Meloidogyne incognita inside and outside of the roots (egressed into the vermiculite) of four cotton isolines that differ in M. incognita-resistance genes in three experimental trials. DAI = days after inoculation. Different letters over bars within a sampling date indicate significant differences at α = 0.05. Bars with no letters showed no significant difference within a sampling date.

Gall size, percentage egg hatch, and eggs/egg mass for cotton isolines that differ in M_ incognita-resistance genes at 0, 7, and 14 days_

Gall size (cm2) 1 Hatch (%)Eggs/egg mass
Genotype0 days7 days14 days40 DAI2 30 DAI40 DAI
Coker0.0085 A a0.0091 A a0.0081 A a17.20 A182 A495 A
CH140.0080 A a0.0090 A a0.0080 A a14.96 A123 AB325 BC
CH110.0091 A ab0.0100 A a0.0068 A b19.24 A146 B386 B
M-1200.0056 B b0.0074 A a0.0075 A a18.60 A135 AB300 C
DOI: https://doi.org/10.21307/jofnem-2020-122 | Journal eISSN: 2640-396X | Journal ISSN: 0022-300X
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Language: English
Page range: 1 - 8
Published on: Jan 13, 2021
Published by: Society of Nematologists, Inc.
In partnership with: Paradigm Publishing Services
Publication frequency: 1 times per year
Keywords:
Cotton,
Nematode resistance,
Resistance expression
Related subjects:
Life sciences,
Life sciences, other

© 2021 Mychele B. da Silva, Richard F. Davis, Robert L. Nichols, Pawan Kumar, Peng W. Chee, published by Society of Nematologists, Inc.
This work is licensed under the Creative Commons Attribution 4.0 License.

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