THE CHARACTERISTIC OF NEW TETRAPLOID POPULATIONS OF CORN ON VARIOUS BACKGROUNDS OF CROPS (MOISTURE PROVIDED AND DROUGHTY)

Proceeding from results of dynamics of climate for the last 30 years, about the KBNIISKH selection programs essential corrections are made. Selectors conduct researches on identification of drought-resistant forms with mainly latent type of resistance to a drought. Such genotypes can be revealed in the VNIIR collection of N. I. Vavilov in whom all world resources of a genetic variety of plants are concentrated. According to the program of cooperation with VNIIR of N. I. Vavilov, researches on identification of genetic sources of drought resistance and cold constancy on an equal basis with other selection and valuable signs are conducted. Methods of the remote and closely related hybridization, a poliploidiya, a mutagenesis are for this purpose used. Global warming of climate will cause not only change of meteorological parameters, but also and change of a background of diseases and wreckers of agricultural plants. Therefore selectors search of genotypes steady against diseases and to the wreckers characteristic of droughty summer climate and rainy cool spring and fall continues It is necessary to conduct additional selection researches on creation of early ripe plants and plants with the displaced phases of physiological development, capable to form the main harvest before atmospheric and soil water deficiency. So, for example tetraploid corn which due to formation of more powerful root system, a thickening of leaves, a stalk and a core of an ear has high potential of drought resistance, than diploidic corn. The moisture reserve which is in these parts of plants allows a plant to form rather big crop of grain at short-term droughts.

corn, tetraploid, background flagoobraznye and arid populations

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