hi 

Embryo rescue is one of the earliest and successful forms of in-vitro culture techniques that is used to assist in the development of plant embryos that might not survive to become viable plants.Embryo rescue plays an important role in modern plant breeding, allowing the development of many interspecific and intergeneric food and ornamental plant crop hybrids. This technique nurtures the immature or weak embryo, thus allowing it the chance to survive. Plant embryos are multicellular structures that have the potential to develop into a new plant. The most widely used embryo rescue procedure is referred to as embryo culture, and involves excising plant embryos and placing them onto media culture.Embryo rescue is most often used to create interspecific and intergeneric crosses that would normally produce seeds which are aborted. Interspecific incompatibility in plants can occur for many reasons, but most often embryo abortion occurs.In plant breeding, wide hybridization crosses can result in small shrunken seeds which indicate that fertilization has occurred, however the seed fails to develop. Many times, remote hybridizations will fail to undergo normal sexual reproduction, thus embryo rescue can assist in circumventing this problem

hi 

Embryo rescue is one of the earliest and successful forms of in-vitro culture techniques that is used to assist in the development of plant embryos that might not survive to become viable plants.Embryo rescue plays an important role in modern plant breeding, allowing the development of many interspecific and intergeneric food and ornamental plant crop hybrids. This technique nurtures the immature or weak embryo, thus allowing it the chance to survive. Plant embryos are multicellular structures that have the potential to develop into a new plant. The most widely used embryo rescue procedure is referred to as embryo culture, and involves excising plant embryos and placing them onto media culture.Embryo rescue is most often used to create interspecific and intergeneric crosses that would normally produce seeds which are aborted. Interspecific incompatibility in plants can occur for many reasons, but most often embryo abortion occurs.In plant breeding, wide hybridization crosses can result in small shrunken seeds which indicate that fertilization has occurred, however the seed fails to develop. Many times, remote hybridizations will fail to undergo normal sexual reproduction, thus embryo rescue can assist in circumventing this problem

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The term “embryo rescue” refers to a number of in vitro techniques whose purpose is to promote the development of an immature or weak embryo into a viable plant. Embryo rescue has been widely used for producing plants from hybridizations in which failure of endosperm to properly develop causes embryo abortion. In embryo rescue procedures, the artificial nutrient medium serves as a substitute for the endosperm, thereby allowing the embryo to continue its development. Embryo rescue techniques are among the oldest and most successful in vitro procedures. Embryo rescue techniques also have been utilized to obtain progeny from intraspecific hybridizations that do not normally produce viable seed. Embryo rescue techniques have also been used in situations in which embryo abortion is not a concern, such as for overcoming seed dormancy and studying seed development and germination.

For more details you can visit the following link:

https://naldc.nal.usda.gov/download/42085/PDF

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Also the links here will help you 

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http://horttech.ashspublications.org/content/1/1/122.full.pdf

https://www.ncbi.nlm.nih.gov/pubmed/21207263

http://www.insad.pl/files/journal_pdf/Suppl_1_2006/full2006_12.pdf

http://file.scirp.org/pdf/AJPS_2014061915281019.pdf

http://blog.harvest.ng/category/what-is-the-embryo-rescue-technique/

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hi, sir

3 major embryo rescue techniques there for micro-propagation viz. embryo culture, ovule culture and ovary culture. This techniques have so various advantages like;-  

To raise a healthy plant from abortive or non-viable embryos;- To overcome seed dormancy, To shortening the breeding cycle, To overcome self-sterility of seeds, Seed testing, prevention of embryo abortion in early ripening stone fruits like peach, plum, cherry and apricot. we can also use embryos for germplasm conservation

I think that Ahmed Al mayahi, Noor Edan Jarad and Ashok Kumar Meena explaned very well about the embryo rescue technique and its merits. You can explore your knowledge by studying following attached papers. Thanks.