보리 滑芒의 遺傳과 이의 飼料關聯形質에 대한 多面發現 效果

Inheritance and pleiotropic effects of smooth awn on some characters related to feed adaptability of whole crop barley

The purpose of this study designed to investigate inheritance pattern of awn roughness and to observe the relationships among awn roughness and other agronomic characters and compositions in barley. Also, the experiment was conducted to provide basic genetic informations for better quality and high-yielding in barley breeding for whole crop silage. The parents, F₁ and F₂’s obtained from reciprocal crosses of Turkey 99(gs4r) variety with smooth awn and Olbori, Chalbori, Jogangbori and Suwon #259 with rough awn were planted in the field of Barley and Wheat Research Station, Suwon, during 1991~1992 crop season. Smooth awn was inherited by a simple recessive gene and appeared to be controlled by one set of allele. But there was some variations of awn roughness in smooth awn barley. Therefore, inheritance of awn roughness in barley seemed to be concerned with a modifier gene. The gene governing smooth awn showed some pleiotropic effects on heading and growing characteristics to the direction of early heading, short stature, increasing of culm diameter and width of flag leaf including reducing of dry weight per plant. The gene governing smooth awn also exhibited pleiotropic effects to the direction of increasing spikes per plant and decreasing grains per spike, grain weight per spike and yield per plant. For improvling high-yielding varieties having smooth awn and transferring beneficial characters from smooth-awn plant into rough-awn plant, substitution backcross will be desirable as efficient breeding method. Crude protein, phosphorous, calcium, natrium and ash content were almost normall distributed in F₂ populations of four crosses. The feed compositions of smooth-awn populations were higher than rough-awn ones, while ferrum content of the former was lower than the latter population.