Sugary endosperm

3. Sugary endosperm. The sugary endosperm which has been used in experimental work since the beginning of maize genetics is designated as su₁.

A) Interrelation between sugary₁ and sugary₂

su₁ x su₂ - all starchy	Su₂	su₂
su₂ x starchy - starchy in F₁ - F₂	4407	1318
Backcrosses	1884	1594

	Su₁ Su₂	Su₁ su₂	su₁ Su₂	su₁ su₂
F₂ from su₁ x su₂	9493	2991	4069

B) Relation between su₂ and Y.

	Y Su₂	Y su₂	y Su₂	y su₂
F₂	1930	394	393	340
Backcrosses	1065	492	577	895

C) Sugary₃ in chromosome 9

Relation between sugary₃ and shrunken endosperm

			Su₃ Sh	Su₃ sh	su₃ Sh	su₃ sh
17050	-4	⊗	267	18	13	113
	-7	⊗	261	71	54	90
	5	⊗	114	13	15	19

Relation between su₃ and pr₂

			Pr Su	Pr su	pr Su	pr su
17011	-4	⊗	184	15	17	55*
	-1	⊗	170	9	7	45*
17012	-1	⊗	157	71	78	4**

* coupling
** repulsion