Stability analysis of grain yield is an efficient tool for the selection of varieties adapted to fairly wide cultivation zone. A study aims to determine adaptability and stability for grain yield and agronomic perform...Stability analysis of grain yield is an efficient tool for the selection of varieties adapted to fairly wide cultivation zone. A study aims to determine adaptability and stability for grain yield and agronomic performance of 10 elite Doubled Haploid (DH) rice genotypes generated through another culture technique, along with local cultivar Umgar as a check under irrigated lowland conditions in three different environments in the central clay plains of the Sudan;during two cropping seasons 2019 and 2020. The trials were conducted in a randomized complete block design with three replications. Grain yield stability was studied, using the Additive Main effect and Multiplicative Interaction (AMMI) model. Bi-plots were developed following GGE bi-plot methodology over the six environments. The combined analysis of variance revealed significant to highly significant (P < 0.001) effects of genotypes, environments, and genotype by environment interaction. Moreover, the analysis of variance based on AMMI indicated significant genotypes, environments, and GE interaction with a total variation of 43.16%, 44.26% and 12.58% respectively. A biplot-AMMI analysis and yield stability index incorporating the AMMI stability value and yield in a single non-parametric index were used to identify the genotypes with the highest and stable yield. The overall mean for grain yield was 5.69 t/ha, with a range of 5.77 to 4.12 t/ha. The genotypes k150147, k150870, k150032, k150912, and k150307 out yielded the local check Umgar by 40%, 38%, 34%, 34% and 33% respectively. The most genotypes were mid-early maturities which were harvested at 107, 113, 108, 109 and 112 days after sowing, respectively. These five genotypes also showed grain yield stability along with their high mean yield performance according to the AMMI analysis and widely adaptable to the tested locations. Therefore, the five out yielding genotypes will be considered for cultivation under irrigated system condition in central clay in the Sudan.展开更多
The technique of producing doublehaploid of wheat by distant hybridization between wheat and maize has characterized with better inducing effect, shorter in- ducing period, easy operation, and so on. At present, it is...The technique of producing doublehaploid of wheat by distant hybridization between wheat and maize has characterized with better inducing effect, shorter in- ducing period, easy operation, and so on. At present, it is the most efficient and has great potential of application in breeding of wheat. This article reviewed princi- ple and production process of the technique, research situation of the three key in- dicators of the technology（embryo rate, seedling rate and success rate of doubling）in recent years, and application of the technology in breeding, genetics, germplasm improvement of wheat. At last, both the achievements and the direction of further improvement and development of the technology in our program were discussed.展开更多
利用籼粳交珍汕97/武育粳2号F1花培获得的190个双单倍体群体(doubled-haploid population,DH系)及其构建的179个SSR分子标记遗传图谱,通过对DH系群体苗期重复接虫试验和2个不同时期对褐飞虱危害程度进行动态调查,并应用Mapmaker/exp Ver...利用籼粳交珍汕97/武育粳2号F1花培获得的190个双单倍体群体(doubled-haploid population,DH系)及其构建的179个SSR分子标记遗传图谱,通过对DH系群体苗期重复接虫试验和2个不同时期对褐飞虱危害程度进行动态调查,并应用Mapmaker/exp Version 3.0和Windows QTL Cartographer V 2.0对水稻抗褐飞虱数量性状基因位点(quantativetraitlocus,QTL)进行动态检测和遗传效应分析.结果表明,在苗期对褐飞虱抗性的检测中,共检测到6个抗性QTL,分别位于第2、3、4、8和10染色体上,各QTL的LOD值分别为2.22～4.64,贡献率为5.04%～13.73%,第3染色体和第4染色体上各有1个QTL的加性效应为正值,表明来自于亲本武育粳2号的这2个位点的等位基因可以提高水稻对褐飞虱的抗性,其余4个QTL的加性效应均为负值,表明来自于亲本珍汕97的这些位点的等位基因可以提高水稻对褐飞虱的抗性.展开更多
文摘Stability analysis of grain yield is an efficient tool for the selection of varieties adapted to fairly wide cultivation zone. A study aims to determine adaptability and stability for grain yield and agronomic performance of 10 elite Doubled Haploid (DH) rice genotypes generated through another culture technique, along with local cultivar Umgar as a check under irrigated lowland conditions in three different environments in the central clay plains of the Sudan;during two cropping seasons 2019 and 2020. The trials were conducted in a randomized complete block design with three replications. Grain yield stability was studied, using the Additive Main effect and Multiplicative Interaction (AMMI) model. Bi-plots were developed following GGE bi-plot methodology over the six environments. The combined analysis of variance revealed significant to highly significant (P < 0.001) effects of genotypes, environments, and genotype by environment interaction. Moreover, the analysis of variance based on AMMI indicated significant genotypes, environments, and GE interaction with a total variation of 43.16%, 44.26% and 12.58% respectively. A biplot-AMMI analysis and yield stability index incorporating the AMMI stability value and yield in a single non-parametric index were used to identify the genotypes with the highest and stable yield. The overall mean for grain yield was 5.69 t/ha, with a range of 5.77 to 4.12 t/ha. The genotypes k150147, k150870, k150032, k150912, and k150307 out yielded the local check Umgar by 40%, 38%, 34%, 34% and 33% respectively. The most genotypes were mid-early maturities which were harvested at 107, 113, 108, 109 and 112 days after sowing, respectively. These five genotypes also showed grain yield stability along with their high mean yield performance according to the AMMI analysis and widely adaptable to the tested locations. Therefore, the five out yielding genotypes will be considered for cultivation under irrigated system condition in central clay in the Sudan.
文摘The technique of producing doublehaploid of wheat by distant hybridization between wheat and maize has characterized with better inducing effect, shorter in- ducing period, easy operation, and so on. At present, it is the most efficient and has great potential of application in breeding of wheat. This article reviewed princi- ple and production process of the technique, research situation of the three key in- dicators of the technology（embryo rate, seedling rate and success rate of doubling）in recent years, and application of the technology in breeding, genetics, germplasm improvement of wheat. At last, both the achievements and the direction of further improvement and development of the technology in our program were discussed.
文摘利用籼粳交珍汕97/武育粳2号F1花培获得的190个双单倍体群体(doubled-haploid population,DH系)及其构建的179个SSR分子标记遗传图谱,通过对DH系群体苗期重复接虫试验和2个不同时期对褐飞虱危害程度进行动态调查,并应用Mapmaker/exp Version 3.0和Windows QTL Cartographer V 2.0对水稻抗褐飞虱数量性状基因位点(quantativetraitlocus,QTL)进行动态检测和遗传效应分析.结果表明,在苗期对褐飞虱抗性的检测中,共检测到6个抗性QTL,分别位于第2、3、4、8和10染色体上,各QTL的LOD值分别为2.22～4.64,贡献率为5.04%～13.73%,第3染色体和第4染色体上各有1个QTL的加性效应为正值,表明来自于亲本武育粳2号的这2个位点的等位基因可以提高水稻对褐飞虱的抗性,其余4个QTL的加性效应均为负值,表明来自于亲本珍汕97的这些位点的等位基因可以提高水稻对褐飞虱的抗性.
