DINAMICA CREŞTERII ÎN DIAMETRU A DESCENDENŢILOR CONSANGVINI LA STEJARUL PEDUNCULAT (Quercus robur L.)

Petru CUZA Rezervaţia ştiinţifică „Plaiul Fagului”

Rezumat

A research of the growth on diameter consanguine posterities of a pedunculata oak (Quercus robur L.) is varied out. It is revealed, that in the first years of a life the greatest influence on the growth of sapling is rendered by environment factors. With the years the share of influence of environment factors on the growth of posterity’s decreases, the share of influence of parent trees however grows. The decrease in capacity as „inbreeding depression” varies consequence of display differently in the investigated posterities. The decrease in growth on diameter is most expressed in a part of sapling populations 2С. Apparently, the decrease in growth at a part of sapling is caused by the accumulation of harmful recessives genes. Since the 4-th year of life the tendency of the differentiated and stable growth of posterities was showed. Therefore according to the energy of growth, sapling posterities of an oak are attributed to categories of strong, average and weak growth. Probably, the revealing of various energy of growth at posterities is caused gradually by display of attributes in an oak.