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《Journal of Northwest Sci-Tech University of Agriculture and Forestry》 1989-03
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AN ANALYSIS OF GENETIC ADVANCES IN F_2 PRINCIPAL-CHARACTERS IN WINTER WHEAT

Yang Gaihe: (Agronomy Department, Northwestern Agricultural University)  
This paper analyses the genetic advances, relative genetic advances, selective indexes -in V: priv cipal characters. The results indicate that the single plant cutput car be selected fro;n some hybridized combinations directly,some of Vihich can be do-e by th, plant height, heading period,ICC-grain weight and counting single grains per eai . Direct selection of o!her factors for output formation is best. Therefore, evaluation of hybridized combinations and single plant selection can be done by y -3. 4923x1-11.7500x2+65.3411x3 + 0 . 8909x5(plant height + heading period +100-grain weight+counting grain per ear) .
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