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1保证并提高亲本种子纯度只有提高原种及亲本种子纯度,才能保证杂交种的纯度。在亲本不纯的情况下,杂交种质量就无从谈起。一般情况下,亲本生产分3次去杂,第1次在苗期至拔节期,砍掉杂形株、杂株;第2次在拔节期至开花期前,砍掉异形株、杂株;第3次收获后穗选,把杂穗、劣穗彻底去除后方可脱粒。另外,一是严格按生产技术操作规程生产亲本种子。
1 to ensure and improve the purity of the parent seed Only to improve the purity of the original seed and parent seed, in order to ensure the purity of hybrids. In the case of parents impure, the quality of hybrids is impossible to talk about. Under normal circumstances, the parents were divided into 3 times to miscellaneous, the first in the seedling to jointing stage, cut off hybrids, hybrids; the second in the jointing period before flowering, cut off heteromorphic plants, hybrids; The third harvest after the election, the hybrid spike, spike completely removed before threshing. In addition, one is the production of parent seeds strictly according to the production technology operation rules.