<abstract xmlns="http://www.w3.org/1999/xhtml"><p><italic>Ditylenchus africanus</italic> affects peanut quality, which leads to downgrading of consignments and economic losses for producers. This nematode is difficult to control and host-plant resistance may be the most effective way to control it. Recently, the peanut breeding line PC254K1 has been identified as resistant to a <italic>D. africanus</italic> population from Vaalharts and will be included into the peanut breeding program. The objectives of our study were to compare the reproduction potential of <italic>D. africanus</italic> geographic populations from five different areas in the peanut production area of South Africa and to assess whether PC254K1 is resistant to all five <italic>D. africanus</italic> populations. Reproduction of the <italic>D. africanus</italic> populations was evaluated on peanut callus in growth cabinets at 21°C, 28°C, and 35°C. The peanut cv. Sellie was included in the study as the <italic>D. africanus</italic>-susceptible reference genotype in the greenhouse and microplots. Reproduction potential of all five of the <italic>D. africanus</italic> populations was similar. Resistance of PC254K1 was confirmed to all five <italic>D. africanus</italic> populations. The resistance trait of a <italic>D. africanus</italic>-resistant cultivar developed from PC254K1 should, therefore, be sustainable over the five localities tested during this study.</p></abstract>

Ditylenchus africanus affects peanut quality, which leads to downgrading of consignments and economic losses for producers. This nematode is difficult to control and host-plant resistance may be the most effective way to control it. Recently, the peanut breeding line PC254K1 has been identified as resistant to a D. africanus population from Vaalharts and will be included into the peanut breeding program. The objectives of our study were to compare the reproduction potential of D. africanus geographic populations from five different areas in the peanut production area of South Africa and to assess whether PC254K1 is resistant to all five D. africanus populations. Reproduction of the D. africanus populations was evaluated on peanut callus in growth cabinets at 21°C, 28°C, and 35°C. The peanut cv. Sellie was included in the study as the D. africanus-susceptible reference genotype in the greenhouse and microplots. Reproduction potential of all five of the D. africanus populations was similar. Resistance of PC254K1 was confirmed to all five D. africanus populations. The resistance trait of a D. africanus-resistant cultivar developed from PC254K1 should, therefore, be sustainable over the five localities tested during this study.

Reproduction and Damage Potential of Five Geographical <italic>Ditylenchus africanus</italic> Populations on Peanut

Journal of Nematology

This work is licensed under the Creative Commons Attribution 4.0 International License.

Reproduction and Damage Potential of Five Geographical  Populations on Peanut

Ditylenchus africanus affects peanut quality, which leads to downgrading of consignments and economic losses for producers. This nematode is difficult to...

Reproduction and Damage Potential of Five Geographical Ditylenchus africanus Populations on Peanut

Published Online: Jul 21, 2017

Page range: 72 - 78

Received: Dec 01, 2015

DOI: https://doi.org/10.21307/jofnem-2017-011

Keywords
Arachis hypogaea, Ditylenchus africanus, peanut, pod nematode, resistance

© 2016 Sonia Steenkamp et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Reproduction and Damage Potential of Five Geographical Ditylenchus africanus Populations on Peanut

Published Online: Jul 21, 2017

Page range: 72 - 78

Received: Dec 01, 2015

DOI: https://doi.org/10.21307/jofnem-2017-011

KeywordsArachis hypogaea, Ditylenchus africanus, peanut, pod nematode, resistance

© 2016 Sonia Steenkamp et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Keywords
Arachis hypogaea, Ditylenchus africanus, peanut, pod nematode, resistance