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- W1977175862 abstract "SUMMARYB chromosomes were found in varying frequencies in the diploid (56%) and tetraploid (5%) species in natural populations of Inner Mongolian Agropyron Gaertn., but there was no relationship between the presence of Bs and the ecological and climatic conditions in which the populations were found. Bs were usually smaller than As and showed polymorphism with three kinds of morphology: telocentric, metacentric and acrocentric with this latter being by far the most frequent. The Bs showed great mitotic instability (from 0 to 6 Bs per cell) and they were present in pollen mother cells, in primary roots and in stem tissues, but not in adventitious roots. It was impossible to analyse their transmission through gametes. However, the meiotic behaviour of the Bs was regular and smilar to that of As. They paired between themselves as bivalents, multivalents up to pentavalents. Usually, they segregated normally and were rarely lost et AI and AII The heterochromatic nature of Bs in Agropyron is discussed although heterochromatic bands were not observed following Giemsa banding techniques." @default.
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- W1977175862 date "1993-01-01" @default.
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- W1977175862 title "The B chromosome system of Inner MongolianAgropyronGaertn. 1. Distribution, morphology and cytological behaviour" @default.
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- W1977175862 doi "https://doi.org/10.1080/00087114.1993.10797265" @default.
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