摘要
用我国抗穗发芽性显著不同的21个白粒小麦品种(系)及1个红皮品系为材料,分别配成5×6、4×7和7×5三套NCⅡ交配设计,以穗发芽率为指标对杂种F_1及亲本进行配合力分析。结果一般配合力方差达极显著水平,特殊配合力方差亦显著或极显著,基因加性效应起主要作用。抗性亲本对杂种抗穗发芽性表现的作用显著大于敏感亲本,其平均穗发芽率与其一般配合力效应间相关较高,平均相关系数为0.816。穗发芽抗性遗传力较高,广义遗传力和狭义遗传力平均分别为83.30％和58.96％,可以在杂种早代-中代对其进行选择。涪陵须须麦、万县白麦子、遂宁坨坨麦、万雅M120E6、丰产3号等具有较好的一般配合力,可作为优良白粒抗源在育种中利用。
Twenty-one sprouting-resistant white-seeded cultivars or advanced lines and
one red strain of bread wheat with different genetic backgrounds were selected as parents. Three
sets of NC II mating design crosses were made in 5 × 6, 4×7 and 7×5, respectively. Combining
ability analysis of the sprouting percentage in ears was conducted for the F1s and their parents.
The variances of both general combining ability (g. c. a. ) and specific combining ability (s. c.
a. ) were significant, and the additive effects of the genes played a major role in the inheritance of
the sprouting tolerance in white wheat. The resistant parents had a much larger impact on the
performance of hybrid F1 in sprouting resistance than the susceptible parents. The average of cor
relation coefficients between mean sprouting percentages and g. c. a. effects of the resistant par
ents was 0. 816. The averaged estimates of broad-sense and narrow-sense heritability over three
years were 83. 30% and 58. 96%, respectively, which indicated that selection for the resistance
could be carried out in early-middle generations of the hybrids. It was also showed that FLXXM,
WXBMZ, SNTTM, WY/M120/E6 and Fengchan 3 possessed better general combining ability
and could be used as the desired white-seeded resistant parents in wheat breeding for preharvest
sprouting tolerance.
出处
《作物学报》
CAS
CSCD
北大核心
1998年第4期491-496,共6页
Acta Agronomica Sinica
基金
国家自然科学基金
国家小麦育种攻关
农业部重点应用基础研究资助项目
关键词
小麦
育种
白粒种质
穗发芽抗性
配合力
Wheat breeding
White-grained germplasm
Resistance to preharvest sprouting
Combining ability
Inheritance
