摘要
以二棱大麦(Hordeum distichum L.)甘木二条等7个品种进行Griffing方法4双列杂交,对亲本、P_1和F_2茎粗、株高、各株高构成因素,采用加性-显性-上位性(ADAA)模型进行遗传分析。遗传方差分量占表现型方差比率的估算表明,除倒一节(穗颈节)和茎粗没有上位性效应,符合加性-显性(AD)模型外,其余茎杆性状均符合加性-显性-上位性(ADAA)模型。其中茎杆基部各节长度以加×加上位性效应为主,茎杆上部节间长度和茎粗以加性效应为主。除基部第一节间长度以外,其余各节间长度的狭义遗传力均大于55％,广义遗传力均大于80％。基因效应预测值表明,甘木二条、苏啤1号、6711-28、浙农大3号有使后代基部节间变短的遗传效应;紫皮大麦、6711-28、甘木二条有使后代的穗颈节增长的遗传效应;RisΦ1508、苏啤1号、浙农大3号、甘木二条有使后代的植株变矮的遗传效应;S-096、6711-28、紫皮大麦有使后代的茎杆增粗的遗传效应。相关分析表明,植株各节与株高的相关系数依大小次序为穗颈节、第三节、倒二节、第二节、第一节,第三节与株高的相关主要是加性效应间的相关。
A diallel analysis of culm thickness, plant height and plant height components was carried out for F1, F2 and parents of 7 two-rowed barley varieties by using additive-dominance-epistatic model. Estimation of the ratio of variance component to phenotypic variance indicates that peduncle length and culm thickness are only controlled by additive and dominance effects, while other culm characters are also controlled by additive by additive epistatic effects. Lengths of the first 3 internodes from the bottom are mainly controlled by additive effects, while the first and second internode from the top and culm thickness are mainly controlled by additive effects. Except for the first internode length, culm traits have higher broad-sense and narrow-sence heritabilities. Estimation of gene effects shows that in the progenies of crosses with Ganmuertiao, Supi 1, 6711-28, and Zhenongda 3 as parents, plants wjth shorter internode length at the base are much more likely to be selected, whereas more plants with a longer top internode would segregate from the crosses using Zipidamai, 6711-28, and Ganmuertiao as parents; more plants with shorter plant height from crosses of Ris Φ1508, Supi 1, Zhenongda 3, and Ganmuertiao; and more plants with thicker culm from the crosses of S-096, 6711-28, and Zipidamai can be obtained. Correlation analysis indicates that the magnitudes of correlation coefficients between plant height and each internode length are in the following order (from large to small): peduncle, third internode, second internode from the top, second internode and first internode. The correlation between plant height and third internode length mainly stems from additive effects.
出处
《作物学报》
CAS
CSCD
北大核心
1995年第5期618-625,共8页
Acta Agronomica Sinica
关键词
大麦
模型
遗传方差分量
遗传效应值
茎杆遗传
Barley (Hordeum distichum L.)
ADAA Model
Culm traits
Genetic variance components
Genetic effects
