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2020, № 84

UDC: 630*165.6 + 630*232.311.3
GSNTI: 68.47.03, 68.47.15

Genetic parameters of the series of progeny tests plus oak trees Quercus robur L

To optimize the scenario for the development of forest seed production, the study of genetic and breeding parameters of test cultures and initial populations is required. The coefficients of additive genetic variation and other genetic parameters of the height and diameter of the trunk, timber stock per 1 ha were determined on 2 sites of the progeny tests of plus oak trees (36 families, age 31-33 years) in the forest-steppe of the European part of the Russian Federation. The purpose of the research is to obtain estimates of the genetic parameters necessary to determine the effectiveness of different types of oak seed orchard. In one plot, the average height of the offspring of plus trees exceeded the control by 3,4%, in another it was less by 1,3%. The excess of diameter over control was 10,4% and 5,2%. In both experiments, this difference for both height and diameter was within the error range, the differences are not significant. In these experiments the positive breeding effect of forest seed orchard 1 generation remains unproven. The coefficients of additive genetic variation of the height and diameter of the trunk in these test cultures are close to zero. With the observed low additive genetic variation of economically important growth characters, testing of offspring of the plus trees to create forest seed orchard 1,25 и 1,5 generation is not advisable. When creating oak forest seed objects, preference should be given to the cheapest type of seed orchard - permanent forest seed plots.
Keywords: Quercus robur L, plus trees, breeding, progeny tests, genetic parameters of growth characters, forest seed orchard.
DOI: 10.21515/1999-1703-84-168-173

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Authors:

1. Kamalov Ravil Mingazovich, PhD in Agriculture, Senior Researcher, Federal State Budgetary Institution "All-Russian Research Institute of Forest Genetics, Breeding and Biotechnology".
2. Kamalova Irina Ivanovna, PhD in Biology, Leading Researcher, Federal State Budgetary Institution "All-Russian Research Institute of Forest Genetics, Breeding and Biotechnology".