Cytogenetics of the acrotrisomic 5S^5L in barley

An acrotrisomic plant was identified in the progeny of a telotrisomic for 1S. The acrocentric chromosome had a complete short arm (5S) and 40% of the proximal segment of the long arm (5L). Morphology of the acrotrisomic 5S 5L was similar to the primary trisomic (triplo 5) and triplo 5L. At meiosis the acrocentric 5S 5L either paired with its normal homologues forming a trivalent or remained as a univalent. Seed fertility was high. Transmission...