Common QTL affect the rate of tomato seed germination under different stress and nonstress conditions

Majid R. Foolad, Prakash Subbiah, Liping Zhang

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

The purpose of this study was to determine whether the rates of tomato seed germination under different stress and nonstress conditions were under common genetic controls by examining quantitative trait loci (QTL) affecting such traits. Seeds of BC1 progeny of a cross between a slow-germinating tomato breeding line and a rapid-germinating tomato wild accession were evaluated for germination under nonstress as well as cold, salt, and drought stress conditions. In each treatment, the most rapidly-germinating seeds were selected, grown to maturity, and subjected to molecular marker analysis. A selective genotyping approach detected between 6 and 9 QTL affecting germination rate under each of the four conditions, with a total of 14 QTL identified. Ten QTL affected germination rate under 2 or 3 conditions, which were considered germination-related common QTL. Four QTL affected germination rate only in one treatment, which were considered germination-related, condition-specific QTL . The results indicated that mostly the same QTL affected seed germination under different stress and nonstress conditions, supporting a previous suggestion that similar physiological mechanisms contribute to rapid seed germination under different conditions. Marker-assisted selection for the common QTL may result in progeny with rapid seed germinability under different conditions.

Original languageEnglish (US)
Article number97386
JournalInternational Journal of Plant Genomics
Volume2007
DOIs
StatePublished - Dec 1 2007

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Quantitative Trait Loci
Lycopersicon esculentum
Germination
quantitative trait loci
Seeds
seed germination
tomatoes
germination
seeds
Droughts
cold stress
breeding lines
marker-assisted selection
genotyping
Breeding
salt stress
water stress
Salts
genetic markers
Therapeutics

All Science Journal Classification (ASJC) codes

  • Genetics
  • Plant Science

Cite this

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abstract = "The purpose of this study was to determine whether the rates of tomato seed germination under different stress and nonstress conditions were under common genetic controls by examining quantitative trait loci (QTL) affecting such traits. Seeds of BC1 progeny of a cross between a slow-germinating tomato breeding line and a rapid-germinating tomato wild accession were evaluated for germination under nonstress as well as cold, salt, and drought stress conditions. In each treatment, the most rapidly-germinating seeds were selected, grown to maturity, and subjected to molecular marker analysis. A selective genotyping approach detected between 6 and 9 QTL affecting germination rate under each of the four conditions, with a total of 14 QTL identified. Ten QTL affected germination rate under 2 or 3 conditions, which were considered germination-related common QTL. Four QTL affected germination rate only in one treatment, which were considered germination-related, condition-specific QTL . The results indicated that mostly the same QTL affected seed germination under different stress and nonstress conditions, supporting a previous suggestion that similar physiological mechanisms contribute to rapid seed germination under different conditions. Marker-assisted selection for the common QTL may result in progeny with rapid seed germinability under different conditions.",
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Common QTL affect the rate of tomato seed germination under different stress and nonstress conditions. / Foolad, Majid R.; Subbiah, Prakash; Zhang, Liping.

In: International Journal of Plant Genomics, Vol. 2007, 97386, 01.12.2007.

Research output: Contribution to journalArticle

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