Four inbred lines of maize are crossed. This | vedclass

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(B) In plant breeding,specifically in maize,a double cross involves crossing two single-cross hybrids. $A$ single-cross hybrid is produced by crossing

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Double cross

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(B) In plant breeding,specifically in maize,a double cross involves crossing two single-cross hybrids. $A$ single-cross hybrid is produced by crossing two inbred lines ($A 	imes B$ and $C 	imes D$). When these two single-cross hybrids are crossed $([A 	imes B] 	imes [C 	imes D])$,it involves four distinct inbred lines. This method is widely used to produce commercial hybrid maize seeds to exploit heterosis and improve yield.

Four inbred lines of maize are crossed. This type of cross is known as:

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