Hybrid wheatThe production of hybrid wheat occurs on a limited scale in Australia and the female parentsof all hybrids are alloplasmic and male sterile. Male sterility is a function of the interactionbetween the T. aestivum nucleus and the T. timopheevii cytoplasm. In the hybrid, malefertility is restored by the presence of a chromosomal segment from the T. timopheeviigenome. This segment is normally present in a chromosomal translocation in the male parent(male fertility restorer) of the hybrid (Wilson & Ross 1962).
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