Inheritance of resistance to early blight disease in a diploid potato population

Christ, Haynes

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Early blight disease, caused by Alternaia solani Sorauer, is a serious disease of potato foliage and tubers that occurs in most potato-growing regions world-wide. Developing new potato cultivars with resistance to early blight may reduce losses in the field and in storage, and lessen the need for fungicide applications. A total of 280 clones, derived from 72 maternal half-sib families from a diploid randommated hybrid population of Solanum phureja × Solanum stenotomum were examined for resistance to early blight. The clones that were evaluated in a replicated field trial for 2 years in Pennsylvania, USA, had similar early blight intensity both years. Significant differences were found among families, within families and for the interaction of years x within families. Broad-sense heritability for resistance, measured as area under the disease progress curve (AUDPC), was estimated as 0.73, with a 95% confidence interval of 0.65-0.78, and narrow-sense heritability was estimated as 0.61 ± 0.29 (P = 0.05). The correlation of AUDPC for early blight between years was 0.57 (P < 0.0001). These results suggest that this diploid population is worthy of use in breeding for early blight resistance.

Original languageEnglish (US)
Pages (from-to)169-172
Number of pages4
JournalPlant Breeding
Volume120
Issue number2
DOIs
StatePublished - May 21 2001

Fingerprint

Solanum tuberosum
Diploidy
blight
inheritance (genetics)
diploidy
potatoes
Solanum
Solanum tuberosum subsp. andigenum
Population
Clone Cells
heritability
clones
Breeding
Mothers
Confidence Intervals
pesticide application
confidence interval
field experimentation
tubers
breeding

All Science Journal Classification (ASJC) codes

  • Agronomy and Crop Science
  • Genetics
  • Plant Science

Cite this

Christ ; Haynes. / Inheritance of resistance to early blight disease in a diploid potato population. In: Plant Breeding. 2001 ; Vol. 120, No. 2. pp. 169-172.
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Inheritance of resistance to early blight disease in a diploid potato population. / Christ; Haynes.

In: Plant Breeding, Vol. 120, No. 2, 21.05.2001, p. 169-172.

Research output: Contribution to journalArticle

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