Embryo and endosperm development in caryopses of hybrids from crosses between tetraploid wheats and their alloplasmic lines with rye

Abstract

Data concerning the embryo and endosperm development in twenty-day-old caryopses of hybrids obtained as the result of pollination with rye pollen of tetraploid wheats (<em>Triticum dicoccoides, T. dicoccum, T. durum</em> and <em>T. polonicum</em>), their alloplasmic lines with <em>T. timopheevi</em> plasma and aIlaplasmic <em>T. timopheevi</em> lines with cytoplasma of the above mentioned tetraploid wheats and hexaploid wheat (<em>T. macha</em>) were analysed. A high variability was noted between the tetraploid wheats as regards the degree of development of the embryo and of the endosperm in the hybrid caryopses and a decisive influence of the wheat genotype on these characters. The data for alloplasmic lines showed that the cytoplasm may have a modifying effect on the expression of these genotype characters.