Heterosis: Complementation by Mitochondria

Many (but not all) hybrids between two genetic pure lines show heterosis; that is the hybrids grow more rapidly or larger than the parental pure lines. The mechanism is not known. Two corn crosses were studied. In one hybrid known to exhibit heterosis, the mitochondria and an artificial 1:1 mixture...

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Published inScience (American Association for the Advancement of Science) Vol. 152; no. 3729; pp. 1640 - 1642
Main Authors McDaniel, Robert G., Sarkissian, Igor V.
Format Journal Article
LanguageEnglish
Published United States American Association for the Advancement of Science 17.06.1966
Subjects
Complementation
Corn
Heterosis
Hybridity
Inbreeding
Mitochondria
Nitrogen
Oxygen
Phosphorylation
Seedlings
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Summary:Many (but not all) hybrids between two genetic pure lines show heterosis; that is the hybrids grow more rapidly or larger than the parental pure lines. The mechanism is not known. Two corn crosses were studied. In one hybrid known to exhibit heterosis, the mitochondria and an artificial 1:1 mixture of parent mitochondria showed heterosis with respect to oxidation and phosphorylation. In the other cross, neither the hybrid plant, its mitochondria, nor the mixture of parent mitochondria showed heterosis.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0036-8075
1095-9203
DOI:10.1126/science.152.3729.1640