中国水稻科学2016，Vol.30Issue(2)：170-180,11.DOI:10.16819/j.1001-7216.2016.5135
甬优系列籼粳杂交稻中熟高产品系的株型特征
Plant-type Characteristics of High-Yielding Lines of Yongyou japonica/indica Hybrid Rice with Medium Maturity
摘要
Abstract
A field experiment was conducted using Yongyou japonica/indica hybrids with medium maturity as materi-al,conventional japonica rice (CJR)Ningjing 3 and Wuyunjing 29,hybrid indica rice (HIR)Fengliangyouxiang 1 and Xinliangyou 6380 as the check.Differences in panicle,leaf,and culm traits of various rice types were compared.The results were follows:1)Yongyou japonica/indica hybrids were divided into two types:high-yielding lines (HYL,over 10.5t/hm2 )and medium-yielding lines (MYL,less than 10.5t/hm2 )based on yield performance.HYL includes Yongy-ou 2638,Yongyou 2640,Yongyou 1610,Yongyou 1612,and Yongyou 1640,while MYL includes Yongyou 1851, Yongyou 1852,Yongyou 1763,Yongyou 7753,and Yongyou 5854.CJR had the highest number of panicles,seed-set-ting rate,and 1000-grain weight,while HYL had the highest spikelet number per panicle.2)HIR had the longest pan-icle length,while HYL had the highest grain weight per panicle and grain density.HIR had the highest number of spikelets on the low secondary rachis branches,while HYL and MYL had the highest number of spikelets in other pani-cle positions,especially on the upper secondary rachis branches and the middle secondary rachis branches of panicle.3) Leaf length and width of the top-three leaves followed a tendency of MYL>HIR>HYL>CJR.HYL had consistently higher rolling rate of top-three leaves than MYL.HYL had the lowest leaf basic angle and dropping angle of the 1 st and 2ndleaf from the top.4)Plant height of HYL was 118.7 cm,higher than CJR (96.6 cm),shorter than HIR (132.9 cm) and MYL (144.1 cm).MYL had the highest length of top-three nodes,while CJR showed the opposite.HYL had the lowest rate of panicle and neck internode to plant height and rate of neck internode to stalk length,while HYL had the highest dry weight per stem,dry weight per sheath,and dry weight per unit internode among different rice types. Breeding index on plant-type characteristics of high-yielding lines of Yongyou japonica/indica hybrid rice with medium maturity and corresponding cultivation methods were proposed.关键词
中熟/甬优/高产/穗部特征/株型/水稻Key words
medium-maturity/Yongyou/high-yielding/panicle traits/plant type/rice分类
农业科技引用本文复制引用
孟天瑶,李晓芸,李超,韦还和,史天宇,马荣荣,王晓燕,杨筠文,戴其根..甬优系列籼粳杂交稻中熟高产品系的株型特征[J].中国水稻科学,2016,30(2):170-180,11.基金项目
农业部超级稻专项(02318802013231) （02318802013231）
国家公益性行业(农业)科研专项(201303102) （农业）
宁波市重大科技资助项目(2013C11001) （2013C11001）
江苏省重点研发项目(BE2015340). （BE2015340）
