宿根固定水稻杂种优势,免去复杂的制种繁殖过程,这是一项选育杂交水稻的新课题。去冬今春,宁南、犍为、金堂县农科所和我所分别在当地进行了宿根杂交稻低代材料的露地宿根越冬观察,结果如下。一、越冬表现整个冬季宿根稻株完全自然露地,未加任何人工防寒保护措施,有的在稻桩间播紫云英,有的是稻桩净作。土壤湿度大体适合冬季作物生长的湿度,既无渍水,也不过度干燥。 (一)多野F_1的越冬。单粳×多野F_1于1977年8-9月播种,有96株带蘖秧苗,1978 Perennial immobilization of rice heterosis, eliminating the complexity of breeding and breeding process, which is a new topic of breeding hybrid rice. To winter and spring, Ningnan, 犍 for Jintang County Institute of Agriculture and I were carried out in the local perennial hybrid rice low generation material perennial perennial observation, the results are as follows. First, the winter performance Perennial rice plants completely natural open field, without any artificial cold protection measures, some sowing in the rice piles Astragalus, some of the rice piles net. Soil moisture is generally suitable for the growth of winter crops humidity, neither waterlogging nor excessive drying. (A) more wild F_1 winter. Single japonica × Tornado F_1 was planted in August-September 1977 with 96 tillering seedlings, 1978