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1 父母本果穗中部定域选种留种 亲本植株所产果穗的不同区域部位的种子具有不同的遗传势和生命力。果穗中部是强遗传势区域部位,且优势最强。选择这一区域部位的子粒作种,不仅具有明显的增产优势,而且还能防杂去劣,减少不良变异,避免品种自然退化。同时,果穗中部子粒饱满均匀,出苗整齐,用此部位留种可增产5%～15%,并可提早5天左右成熟。
1 Parents of the middle part of the ear of the ear seed selection of parent plants produced ear ears of different regions of the seed has a different genetic potential and vitality. Middle ear is a strong genetic potential area, and the strongest advantage. Select the regional parts of the seeds for the species, not only has a significant yield advantage, but also anti-miscellaneous to bad, reduce undesirable variation, to avoid natural degradation of species. At the same time, the ears of the middle grain full uniform, germinate and tidy, with this part of the remaining seeds can increase 5% to 15%, and can mature about 5 days earlier.