HISTONE-H1 OF THE GARDEN PEA (PISUM-SATIVUM L) - COMPOSITION, DEVELOPMENTAL-CHANGES, ALLELIC POLYMORPHISM AND INHERITANCE

Histone H1 of the garden pea (Pisum sativum L.), as a rule, is represe nted by seven subtypes, as revealed by the high resolution acetic acid /urea polyacrylamide gel electrophoresis. Each subtype has molecular v ariants differing in the electrophoretic mobility and is encoded by a single gene. Gene His1, coding for the slowest subtype 1, was mapped o n chromosome 5. A complex locus His(2-6), containing closely linked ge nes encoding subtypes 2 to 6, and the gene His7 of the subtype 7 were mapped on chromosome 1, with the distance of approximately 30 cM betwe en them. Histone H1 spectrum changes during the maturation of tissues: subtype 7 is relatively abundant in all young tissues and gradually d isappears in the course of their maturation, while the relative amount of subtype 6 increases. Several other legume species tested have H1 s pectra homologous to that of the garden pea.