摘要
本文利用Hayman（1954）的双列杂交法对小麦9个产量性状进行了遗传分析，结果表明：籽粒产量、生物产量、每穗小穗数和稳长存在上位性效应，收获指数、每稳粒数、株高、千粒重和每穗不孕小穗数符合加——显遗传模型。株高以加性效应为主．表现为部分显性；收获指数、每穗粒数、千粒重和每德不孕小稳数以显性效应为主，表现为越显性。多数产量性状的显性基因为增效基因。株高的狭义遗传率最大．其次为收获指数和千粒重。早代选择对株高有明显效果，其次是收获指数和千粒重。92425是改良收获指数和千粒重的较好亲本；苏8527是改良每稳粒数的较好亲本：92041是提高于粗重的较好亲本。
The genetic of yield and yield components in wheat was studied in a 6×6 diallel cross set involving six wheat varieties,Estimates of genetic parameters following Hayman's method showed that A-D model was fitted for harvestindex, plant height, kernel number per spike, 1000 kernel weight and spikelets of nonfertilization per spike, and theepistatic existed for grain yield per plant, biomass,spike-lets per spike and length of spike. The additive gene actionwas more important than dominant gene action for plant height.which was inherited as a partial dominant characterconditioned by one to two blocks of genes. HI.kernel number per spike. 1000 kernel weight and spikelets of nonfertilization per spike were inherited as a partialdominant character conditioned by one or more blocks of gene. The correlaton analysis between Wr+Vr and Yr indicated that high value was dominant for most yield components. The estimates of narrow sense heritabllity for plant height was highest in five traits. HI and 1000 kernel weight were secondary, early selection was efficient for improving plant height, HI and 1000 kernel weight were secondary, kernelnumber per spike and spikeiets of nonfertilization may be selected in higher generation. 92425 is good parent for HIand 1000 kernel weight; Su8527 is good parent for kernel number per spike; 92041 is good parent for 1000 kernelweight.
出处
《种子》
CSCD
北大核心
1997年第1期5-9,共5页
Seed
关键词
小麦
产量性状
遗传
双列杂交
Wheat
yield trait
Inheritance
Diallel crosses
