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This article in CS

  1. Vol. 26 No. 3, p. 643-645
     
    Received: May 13, 1985
    Published: May, 1986


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doi:10.2135/cropsci1986.0011183X002600030048x

Alfalfa Triploids with Functional Male and Female Fertility1

  1. N. K. Blake and
  2. E. T. Bingham2

Abstract

Abstract

Alfalfa (Medicago saliva L.) triploids (2n=3x = 24) were produced by crossing tetraploid cultivated alfalfa with cultivated alfalfa at the diploid level (CADL) derived by haploidy. Alfalfa triploids usually function only as seed parents in crosses; however, eight of nine triploids in this study functioned as the pollen parent in 3x-3x, 4x-3x, or 6x-3x crosses. Moreover, two triploids produced self-progeny. In 3x-3x crosses, most progeny had 31 or 32 chromosomes, but progeny with 29,35,45,46,47,48, and 58 chromosomes were also produced. Triploid self-progeny had 31, 32, 36, 45, 46, 47, 48, and 52 chromosomes. Several hexaploids (2n=48) and near hexaploids (2n=45-52) were produced by sexual polyploidy in 3x self, 3x-3x, 3x-6x, and 6x-3x matings.

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