The genetic shift among different generations on synthetic variety "Hitachiaoba" of Italian ryegrass

breeding breeding methods crops cultivos economic plants feed crops feed grasses formas de descendencia forme de descendance glumiflorae gramineae gramineas graminee grasses lawn grasses lolium lolium multiflorum methode methods monocotyledons ornamental plants plantas plantas forrajeras plantas ornamentales plante plante de culture plante ornementale plants progeny forms progeny testing pruebas de descendencia