Comparative characteristics of winter rye varieties according to parameters of adaptability

• Published in: Melioratsiya (Belarus) no. 1; pp. 138 - 144
• Main Authors: Biryukovich, T.V, Mikhnovets, T.V, Artyukh, Yu.D, Gorovaya, M.M., National Academy of Sciences (Belarus). Scientific and Practical Center for Arable Farming
• Format: Publication
• Language: Russian
• Published: 2008
• Subjects: ADAPTABILIDAD; ADAPTABILITE; ADAPTABILITY; BELARUS; BIOLOGICAL PROPERTIES; CENTENO; CONTROLE DE PERFORMANCE; CROP PERFORMANCE; CROPS; CULTIVOS; CULTIVOS DE INVIERNO; CULTURE D'HIVER; DESEMPENO DE CULTIVOS; DIPLOIDIA; DIPLOIDIE; DIPLOIDY; ESTABILIDAD; FORECASTING; http://www.fao.org/aos/agrovoc#c_14010; http://www.fao.org/aos/agrovoc#c_1501; http://www.fao.org/aos/agrovoc#c_15292; http://www.fao.org/aos/agrovoc#c_1972; http://www.fao.org/aos/agrovoc#c_2313; http://www.fao.org/aos/agrovoc#c_24061; http://www.fao.org/aos/agrovoc#c_24917; http://www.fao.org/aos/agrovoc#c_3041; http://www.fao.org/aos/agrovoc#c_33237; http://www.fao.org/aos/agrovoc#c_35024; http://www.fao.org/aos/agrovoc#c_35199; http://www.fao.org/aos/agrovoc#c_36930; http://www.fao.org/aos/agrovoc#c_6919; http://www.fao.org/aos/agrovoc#c_7690; http://www.fao.org/aos/agrovoc#c_8157; http://www.fao.org/aos/agrovoc#c_8488; PERFORMANCE DE CULTURE; PERFORMANCE TESTING; PLANTE DE CULTURE; PROPIEDADES BIOLOGICAS; PROPRIETE BIOLOGIQUE; PRUEBAS DE RENDIMIENTO; RENDEMENT; RENDIMIENTO; RYE; SECALE CEREALE; SEIGLE; STABILITE; STABILITY; TECHNIQUE DE PREVISION; TECNICAS DE PREDICCION; TEMPS METEOROLOGIQUE; TETRAPLOIDIA; TETRAPLOIDIE; TETRAPLOIDY; TIEMPO METEOROLOGICO; VARIEDADES; VARIETE; VARIETIES; WEATHER; WINTER CROPS; YIELDS

For research 13 varieties of winter rye, from which 7 - diploid and 5 - tetraploid have been served as initial material. They have passed the state test in 2003 - 2005 on the following variety test plots: Lepelskij, Octyabr’skij, Vilejskij, Molodechnenskij, Goretskij, Kobrinskij. Weather conditions in years of research considerably fluctuated, that has allowed to estimate a studied material comprehensively and objectively. Research results have shown that parameters of plasticity (regress factor) and stability (mean quadratic deviation from a regress line) give the chance to expect behaviour of variety under production conditions. Varieties with coefficient of regression considerably below unity, pertain to neutral type (with low ecological plasticity). They poorly respond on changes of environmental factors, in conditions of intensive agriculture can not reach high results, but under bad conditions their parameters less decrease in comparison with varieties of intensive type. Varieties with coefficient of regression considerably above unity pertain to intensive type. They possess high plasticity and specific adaptation. It means that under optimum conditions they give high yields. However in adverse years on weather conditions, and also on a low agro background their productivity sharply decreases. The obtained data have shown that phenotypical display of productivity at studied varieties fluctuates from 47,6 to 64,3 c/ha in 2003, from 62,4 to 75,7 c/ha - in 2004; from 60,9 to 79,3 c/ha - in 2005. Having coefficients of factor of regression and mean yields, it is possible to predict ranks of varieties in the best or worst conditions. The greatest predicted yields in a year with the best index of environment was at variety Zarnitsa. Varieties Radzima, Lota, Biryuza, Talisman, Yubilejnaya, Kalinka follow it. Under the worst conditions (a negative index) least predicted yields decreases in a following order: Zarnitsa, Lota, Talisman, Yubilejnaya, Radzima, Biryuza, Kalinka