Invasive Species Compendium

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Abstract

Production and characterization of common wheat with B chromosomes of rye from Korea.

Abstract

To elucidate the cytogenetical effects of B chromosomes of cultivated rye (Secale cereale) from Korea in common wheat (Triticum aestivum cv. Chinese Spring), the transfer of rye B chromosomes to Chinese Spring wheat was undertaken and alien chromosome addition lines were produced and cytogenetically characterized. The presence of B chromosomes did not disturb the pairing between A chromosomes of Chinese Spring at metaphase 1. The increase in the number of B chromosomes did not only increase the number of laggards at anaphase 1 and the number of micronuclei at dyad stage, but also drastically decreased pollen and selfed seed fertility. Moreover, selfed progenies of B chromosome-carrying plants showed considerable seed shrivelling as the number of B chromosomes increased. The B chromosomes in Chinese Spring displayed non-Mendelian inheritance. The characteristics of the B chromosome addition lines produced in the present study were compared with those from other lines.