决定缩短育种轮回的因素是如何克服林木始花龄晚和能否有效进行早期测验和选择。
Shortening breeding cycle depends on how to overcome the long time span before first flowering and on early selection and test.
从轮回选择法改良的玉米育种群体中，选育出了配合力高、抗病性强的玉米新自交系za5716和ZA6192。
Two inbred lines of maize, ZA5716 and ZA6192, with high combining ability and disease resistance, were obtained from a breeding population improved by recurrent selection.
将灰色育种方法与矮败群体改良方法相结合，提出了小麦灰色轮回群体改良方法。
A grey recurrent population improvement of wheat was suggested by combining the grey breeding method with the wheat dwarf male-sterile technology.
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