A Tertiary Trisomic in Barley (Hordeum vulgare L.)
1977 年 42 巻 3-4 号 p. 691-695
詳細
1977 年 42 巻 3-4 号 p. 691-695
A tertiary trisomic plant was obtained in the progeny of an interchange heterozygote T 2-6 in a 6-rowed barley variety K 12. It differed from normal diploids in morphological characteristics. Pollen and ovule fertility were greatly reduced. The extra chromosome showed different types of associations among which chain of five chromosomes was the most frequent configuration. Trivalents mostly oriented in V-shape while pentavalents oriented in zig-zag shape, both giving rise to alternate segregation. The greatest frequency of segregation at anaphase I was that of 8-7 type.
