摘要
分析了两个籼粳杂种一代和2个籼型杂交稻的每穗粒数和稻穗结构.与籼型杂交稻相比,籼粳杂种一代的每穗粒数超过高亲,表现正向超亲优势.这种超亲优势主要是由籼粳杂种稻穗有较多的二次枝梗和二次枝梗着粒数而产生的.还讨论了杂种一代的稻穗结构与亲本选择关系,杂交双亲在稻穗结构上的性状互补将有利于得到大穗型杂种.
The total spikelet number and panicle structure of two indica-japo-nica hybrids and two indica hybrids were analysised.Compared with theindica hybrids,the total spikelet number of indica-japonica hybrids washigher than that of the better parents,showing a positive heterobeltiosis.This heterobeltiosis was due to more secondary branches(SB)and morespikelets on SB in indica-japonica hybrids.The relationship between thepanicle structure of F1 hybrids and parental choice was discussed.Themutual complement of characters between parents on panicle structure willbe helpful to obtaining large-panicle type hybrids.
出处
《江西农业大学学报》
CAS
CSCD
1990年第4期59-62,共4页
Acta Agriculturae Universitatis Jiangxiensis
关键词
籼粳杂种
稻穗结构
穗粒数
Indica japonica hybrid
Heterosis
Spikelet number per panicle
Panicle structure
