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Crop Science Abstract -

Effect of Cytoplasmic Source on the Performance of Double-Cross Hybrids in Maize, Zea mays L.1


This article in CS

  1. Vol. 8 No. 3, p. 278-230
    Received: July 17, 1967

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  1. R. B. Hunter and
  2. E. E. Gamble2



"Cytoplasmic effects" were identified in 11 different double cross hybrids by studying the following combinations of inbreds in each hybrid: (AXB) (CxD), (BxA) (CXD), (CXD) (AXB), and (DXC) (AXB). Eleven agronomicharacters were studied over two years and two locations. Significant cytoplasmic effects occurred for all characcers. Certain inbreds and inbred combinations were associated more frequently with cytoplasmic effects than others although cytoplasmic effects were not always related to the presence of a particular inbred. Cytoplasmic effects were reasonably consistent from year to year and location to location. The year by cytoplasm and location by cytoplasm interactions were usually smaller than the year by hybrid and location by hybrid interactions. It would appear to be desirable to evaluate cytoplasms so as to bring together the best combinations of cytoplasm and nuclear genetic materials.

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