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(一)杂种优势利用谷子杂种优势利用研究,近年取得了较大进展。两系应用方面,首先是二级繁种体系的建立,有效地解决了母本繁殖中的退化、混杂问题,保证了繁种质量。制种技术和杂种高产栽培经验的总结,显著地提高了制种田及杂交种生产田的产量。两系杂交种黄4×1007、蒜28×张农10、黄4×垄粟2号等组合一般比对照增产30%以上。1984年冀、甘两省推广2.2万亩,晋、黑、辽、陕也积极引种试种,转育母本组配适合当地的新组合。三系选育方面,通过
(A) the advantages of heterosis Millet heterosis utilization research, made significant progress in recent years. Two lines of applications, the first is the establishment of two species of breeding system, effectively solve the degradation of mother breeding, mixed problems, to ensure the quality of breeding. Seed production techniques and hybrid high-yielding cultivation experience summed up significantly increased the production of farming and hybrid seed production field. Two lines of hybrids yellow 4 × 1007, garlic 28 × Zhang Nong 10, Huang 4 × Ridge 2 combinations generally yield more than 30% of the control. In 1984, Hebei Province and Gansu Province promoted 22,000 mu. Shanxi, Heilongjiang, Liaoning and Shaanxi also actively introduced and planted the seeds for breeding, and switched the mother-daughter combination to a new local combination. Three lines of breeding, passed