Oleic acid（C18∶1）is one of the main fatty acids of double-low rapeseed oil. Reasonable fatty acid composition of high-oleic-acid rapeseed oil is beneficial to human health. Therefore， improving the oleic acid content is an important direction of rapeseed quality breeding. At present， although the breeding of high-oleic-acid rapeseed varieties in China has started， the relevant research progress is slow， and the industrialization of high-oleic-acid rapeseed oil needs to be improved urgently. This paper focused on the high-oleic-acid rapeseed mainly from four aspects： the high-oleic-acid germplasm resources established by physical and chemical methods globally and their genetic models of the high-oleic-acid trait； the control genes and mutant loci identified in high-oleic-acid germplasm； the cultivation of high-oleic-acid varieties in the world and the development trend of high-oleic-acid varieties in China； the shortcomings of the current high-oleic-acid rapeseed varieties and the improvement ways of the future high-oleic-acid rapeseed varieties. This review comprehensively demonstrated the international research results of high-oleic-acid rapeseed in genetics and breeding for breeders， and also provided a reference for further development of high-oleic-acid rapeseed in China.

As an effective reserve land resource of cultivated land， the regulation and utilization of saline alkali land is particularly important. Rapeseed is an important oil crop in the world， which is one of the few crops used to develop and utilize in saline-alkali fields. In this paper， the physiological， biochemical and molecular mechanisms of rapeseed response to saline alkali stress were analyzed from the aspects of osmotic regulators， antioxidant enzyme activities， photosynthetic parameters and reports of genes related to saline alkali stress. The identification methods were comprehensively expounds and excellent germplasm of saline alkali tolerant were screened during the seedling stage， vegetative growth stage and mature stage of rapeseed. The latest status of variety selection and utilization of saline alkali tolerant rapeseed were summarized， and the research direction in the future was prospected. It was expected to provide the theoretical basis and breeding ideas for the cultivation of new saline-alkali tolerant varieties in rapeseed.

Rapeseed is an important source of edible oil and high quality feed protein. Heterosis utilization is the most important means to cultivate superior traits in rapeseed. Improving the efficiency of parental selection plays a positive role in promoting the cultivation of high quality varieties. The existing rapeseed breeding technology has many problems， such as low efficiency， long cycle， big blindness and limited application range， which could not meet the needs of the rapid development of the rapeseed industry. The breeding technology in double haploid induction is an emerging method for rapid breeding of rapeseed in recent years. It is widely used in the breeding process of new varieties of rapeseed due to its advantages of simple operation， wide application range and high efficiency. This article mainly systematically reviewed the research progress of rapeseed double haploid induction technology from many aspects， such as the discovery， performance， induction mechanism， utilization value， and looked forward to the application prospect of double haploid induction technology in rapeseed. The paper was expected to provide reference for the development and application of rapeseed double haploid induction technology and induction lines in other crops in the future.

Nervonic acid is a kind of very-long chain monounsaturated fatty acid which was found in mammalian nerve tissue first. Nervonic acid is the core natural component of brain nerve tissue and nerve cells， with the function of repairing damaged nerve fibers and helping nerve cell regeneration. The transition of neuroic acid sources from animal to plant has greatly promoted the study of neuroic acid. In recent years， scientists at home and abroad have tried to genetically improve the content of nervonic acid in plants by transgenic technology. Rapeseed containing nervonic acid stands out among the plant sources of nervonic acid， which is expected to solve the shortage of nervonic acid. The physiological functions and sources of neuroic acid in plants were reviewed， and the biosynthetic pathway and extraction technology of neuroic acid from plants were introduced， which was expected to provide theoretical reference for the research on neuroic acid and rapeseed innovative breeding.

The ideotype of crops ask for compact plant type and deep root structure， which is one of the objective of improving crop genetic traits to adapt for modern mechanization and high-density cultivation for high yield. The IGT gene family is mainly involved in the regulation of crop architecture， composed of three subfamilies： DRO1（DEEPER ROOTING 1）， TAC1（TILLER ANGLE CONTROL 1） and LA1（LAZY 1）. They participate in the gene network of crop morphology through the regulation of hormones and related proteins. This paper mainly summarized the progress of IGT gene family members in regulating the morphology of monocotyledon and dicotyledon crops， especially the similarities and differences in branching（tillering）angle and lateral root gravitropism. It provided theoretical value for further studying the regulation mechanism of crop morphological architecture and breeding roadmap for cultivating ideotype crops with high yield， high-dense cultivating tolerance and mechanical harvest.