[Objective]This paper aims to study the heredity and parental correlation of the oil content of the beginning of the generation at highoil content soybean.[Methods]Seven high yield or high-oil content soybean are sele...[Objective]This paper aims to study the heredity and parental correlation of the oil content of the beginning of the generation at highoil content soybean.[Methods]Seven high yield or high-oil content soybean are selected and eight crosses are made according to the NCII design.[Results]The variation of oil content in F5 relates with the difference between parents.The more the differences between both parents have,the more variations of the oil content of F5 become.When the oil content of both parents are high,and the maturating time of them are very different,the probability of high-oil plant in F5 derived from these cross are high.The oil content of F5 generation has negative correlation with the different between both parents and has positive correlation with the oil content of male parent and significant positive correlation with the oil content of female parent and mid-parent.[Conclusions]This study result provide reference for the seedling of High-oil Content Soybean.展开更多
As one of the 3 worldwide major grain crops, maize is the main source of food, feed and edible vegetable oil. High-oil maize has been selectively bred for many years due to its high oil content and nutritional quality...As one of the 3 worldwide major grain crops, maize is the main source of food, feed and edible vegetable oil. High-oil maize has been selectively bred for many years due to its high oil content and nutritional quality. However, compared with normal maize, the progress of high-oil maize breeding is hindered nowadays. Main problems are scarce of high-oil maize germplasm, conventional breeding methods, and slow genetic research progress on oil content and fatty acid composition. In this study, germplasm innovation and gene mining of high-oil maize were reviewed to provide theoretical reference for genetic breeding and utilization. Several high-oil basic populations have been developed after more than 100 years of selection, which have served as the unique resources for high-oil maize breeding. They have also been used to dissect genetic architecture of oil biosynthesis in maize kernel. Using linkage and association analyses, many QTLs and loci associated with oil content and fatty acid composition have been identified and mapped. In addition, some candidate genes for QTLs have been validated to regulate maize grain oil content and fatty acid composition. Prospect for high-oil maize was also discussed to provide knowledge about genetic mechanism of oil biosynthesis and improvement of kernel quality in maize.展开更多
Re-cross was conducted between five ES cytoplasm male-sterile hybrids and four high-oil hybrids, and five normal hybrids, respectively. The oil content, yield, 1000-kernel weight and kernel size were estimated. Result...Re-cross was conducted between five ES cytoplasm male-sterile hybrids and four high-oil hybrids, and five normal hybrids, respectively. The oil content, yield, 1000-kernel weight and kernel size were estimated. Results were as follows: The average kernel oil content in the male-sterile hybrid ×high-oil hybrid was 1.6% higher than that of the female parent. The xenia effect value of oil genes was 0.30. The yield and 1000-kernel weight of male-sterile hybrids were 10.1% and 5.8% higher than that of corresponding fertile hybrids respectively, which showed significant cytoplasm effect. The yield of the male-sterile hybrid × high-oil hybrid was similar to that of the female parent, but its 1000-kernel weight was 7.3% lower than that of the female parent. Compared with the high-oil male parent, grain yield, 1000-kernel weight and kernel size of the male-sterile hybrid× high-oil hybrid were higher. Seed-filling rate, the days of seed-filling and IAA content in the male-sterile hybrid × high-oil hybrid showed average heterosis tending the female parent, which may be perhaps one of the reasons resulting in the average heterosis tending to the female parent on kernel oil content, yield, 1000-kernel weight and kernel size.展开更多
文摘[Objective]This paper aims to study the heredity and parental correlation of the oil content of the beginning of the generation at highoil content soybean.[Methods]Seven high yield or high-oil content soybean are selected and eight crosses are made according to the NCII design.[Results]The variation of oil content in F5 relates with the difference between parents.The more the differences between both parents have,the more variations of the oil content of F5 become.When the oil content of both parents are high,and the maturating time of them are very different,the probability of high-oil plant in F5 derived from these cross are high.The oil content of F5 generation has negative correlation with the different between both parents and has positive correlation with the oil content of male parent and significant positive correlation with the oil content of female parent and mid-parent.[Conclusions]This study result provide reference for the seedling of High-oil Content Soybean.
文摘As one of the 3 worldwide major grain crops, maize is the main source of food, feed and edible vegetable oil. High-oil maize has been selectively bred for many years due to its high oil content and nutritional quality. However, compared with normal maize, the progress of high-oil maize breeding is hindered nowadays. Main problems are scarce of high-oil maize germplasm, conventional breeding methods, and slow genetic research progress on oil content and fatty acid composition. In this study, germplasm innovation and gene mining of high-oil maize were reviewed to provide theoretical reference for genetic breeding and utilization. Several high-oil basic populations have been developed after more than 100 years of selection, which have served as the unique resources for high-oil maize breeding. They have also been used to dissect genetic architecture of oil biosynthesis in maize kernel. Using linkage and association analyses, many QTLs and loci associated with oil content and fatty acid composition have been identified and mapped. In addition, some candidate genes for QTLs have been validated to regulate maize grain oil content and fatty acid composition. Prospect for high-oil maize was also discussed to provide knowledge about genetic mechanism of oil biosynthesis and improvement of kernel quality in maize.
文摘Re-cross was conducted between five ES cytoplasm male-sterile hybrids and four high-oil hybrids, and five normal hybrids, respectively. The oil content, yield, 1000-kernel weight and kernel size were estimated. Results were as follows: The average kernel oil content in the male-sterile hybrid ×high-oil hybrid was 1.6% higher than that of the female parent. The xenia effect value of oil genes was 0.30. The yield and 1000-kernel weight of male-sterile hybrids were 10.1% and 5.8% higher than that of corresponding fertile hybrids respectively, which showed significant cytoplasm effect. The yield of the male-sterile hybrid × high-oil hybrid was similar to that of the female parent, but its 1000-kernel weight was 7.3% lower than that of the female parent. Compared with the high-oil male parent, grain yield, 1000-kernel weight and kernel size of the male-sterile hybrid× high-oil hybrid were higher. Seed-filling rate, the days of seed-filling and IAA content in the male-sterile hybrid × high-oil hybrid showed average heterosis tending the female parent, which may be perhaps one of the reasons resulting in the average heterosis tending to the female parent on kernel oil content, yield, 1000-kernel weight and kernel size.
