Vivipary in a breeding population

BHDC is a breeding stock developed at this Institute around 1970 by intercrossing 37 commercial double crosses of Argentine maize, followed by several generations of free pollination in isolated blocks. In the 1982 Si selection plot, one ear showing typical viviparous grains was observed at harvest. This seems to be closely linked with white endosperm (X2 = 138.45***) and white seedling (not yet analyzed), like that described by Mazoti (Rev. Fac. Agr. UNLP 39:63, 1963, and previous papers). Selfed progenies showed low recombination percentages between vpx and yx (2 to 6%). Location tests and allelism tests are being carried out.

Francisco J. Babinec

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