摘要
穗部性状直接影响着作物的经济产量,研究春小麦穗部性状的遗传组成,为遗传育种中通过进一步改良穗部性状提高产量提供参考和策略。以‘宁春4号’和‘Drysdale’及其构建的F2群体为材料,采用P1、P2、F1、F2四世代联合分离分析法研究了春小麦几个穗部性状:穗长、结实小穗数、不实小穗数、穗粒数的遗传模型。结果表明:穗长符合加性-显性-上位性多基因混合遗传模型,无主基因存在;结实小穗数由2对等加性主基因+加性-显性多基因控制;不实小穗数符合2对加性-显性-上位性主基因+加性-显性多基因混合遗传模型;穗粒数符合2对加性-显性-上位性主基因+加性-显性多基因混合遗传模型。
Spike traits directly affect the economic yield of crops. The genetic constitution of spring wheatspike traits was studied to provide references for genetic breeding by increasing production through modifiedspike traits.‘Ningchun 4＇and‘Drysdale＇and their F2 populations were used as materials, four generations ofP1, P2, F1, F2 joint segregation analysis was applied to study the genetic model of ear length, fertile spikelets,nonbearing spikelet and grains per spike. The results showed that ear length was in accord with additive-dominance-epistatic polygene mixed inheritance model without major gene; fertile spikelet was controlled bytwo pairs equal additive major genes and additive-dominant polygene; nonbearing spikelet was in accord withtwo pairs of additive- dominance- epistatic major genes and additive- dominant polygene mixed inheritancemodel; grains per spike was coincident with the two pairs additive- dominance- epistatic major genes andadditive-dominant polygene mixed inheritance model.
作者
李树华
张文杰
白海波
吕学莲
董建力
惠建
魏亦勤
康学兵
Li Shuhua Zhang Wenjie Bai Haibo Lv Xuelian Dong Jianli Hui Jian Wei Yiqin Kang Xuebing(Agricultural Bio-technology Research Center of Ningxia Academy Agriculture and Forestry Sciences, Yinchuan 750002 Crop Institute of Ningxia Academy of Agriculture and Forestry Sciences, Yongning Ningxia 750105 Agronomy College, Ningxia University, Yinchuan 750021)
出处
《中国农学通报》
2017年第6期20-26,共7页
Chinese Agricultural Science Bulletin
基金
宁夏自治区农业育种专项"小麦新品种选育"(3013NYYZ0202)
国家自然科学基金项目"小麦碳同位素分辨率对水分的响应及其遗传研究"(31060190)
宁夏农林科学院先导基金"小麦抗旱相关性状的QTL定位及分子标记筛选研究"(NKYJ-14-22)
"春小麦灌浆期耐热相关基因的挖掘"(NKYJ-15-07)
关键词
春小麦
穗部性状
主基因+多基因
遗传分析
spring wheat
spike traits
major gene plus polygene
genetic analysis
