论文部分内容阅读
水稻杂交是创造新品种的有效方法。通过有目的有计划的进行杂交工作,可以不断更新水稻品种,为持续高产奠定基础。1.选种目标我省的自然气候条件比较复杂,各水稻主产区对品种要求不同,南部地区三面环海,水田土壤含盐量较大,八、九月间常有暴风雨侵袭,导致水稻倒伏减产,应选育杆壮、抗风、抗倒,耐盐性强而又高产早熟的品种;东部、中部地区水稻栽培管理水平较高,水稻生育期间,特别是七、八月间,稻瘟病都有不同程度的发生,严重影响产量。应选出抗病性强,耐肥抗倒,高产质优的品种;东北部地区是冷凉山区,北部无霜期
Rice hybridization is an effective way to create new varieties. Through purposeful and planned crossbreeding work, rice varieties can be constantly updated to lay the foundation for continued high yield. 1. Selection objectives The province’s natural and climatic conditions are more complex, the main producing areas of rice varieties of different requirements, the southern three sides of the sea, paddy soil salinity larger, frequent storm in August and September, leading to rice Lodging and yield reduction, breeding should be strong rod, wind, lodging, salt tolerance and high yielding varieties of early maturity; the eastern and central regions of rice cultivation and management level is higher during rice growth, especially in July and August, rice Blasts have varying degrees of occurrence, seriously affecting the yield. Should choose a strong disease resistance, resistance to lodging, high yield and high quality varieties; the northeastern region is cold and mountainous areas, the northern frost-free period