论文部分内容阅读
黄淮冬麦区三十年来共选育出优良小麦品种400余个.这些品种的选育,从品种资源利用看,大体可以分成四种情况:一、从原有地方品种评选或系统选育出来的,适应性、抗逆性很好,而丰产性相对较差;二、以地方品种为基础,进行第一轮品种间杂交,加上国外品种的抗锈,丰产因素结合而成;三、以第一轮的改良品种为基础,再与国外品种或改良品种进行第二轮的杂交;四、在本区比较适应的国外品种及以此为基础与其
Huanghuai winter wheat area over the past 30 years, bred a total of more than 400 varieties of fine wheat breeding selection of these varieties, from the species resources to use, can be divided into four general conditions: First, from the original selection of local varieties or breeding system , Adaptability, resistance is good, and high yield is relatively poor; Second, based on the local varieties, the first round of hybrids, plus foreign varieties of rust, high yield factors combine; Third, to The first round of improved varieties as the basis, and then with foreign varieties or improved varieties for the second round of hybridization; Fourth, in this area more suitable for foreign varieties and on the basis of its