Hi: For most of seedling stages for rust phenotyping, infection type is the most impertinent to say if the line have resistance gene or not, also you can take note on the clorosis  and necrosis reaction. this is the most important parameters.

Dear Oadi Matny Thank you .

How it can be explained that infection type is the most impertinent disease note at seedling stage in case of rust diseases?

You should use stripe rust index

https://public.wsu.edu/~wheaties/rustpic.html

87

Hi Dr.Hadi

You can use this scal,

0 No visible symptoms Resistant

1 Very small, pinpoint necrotic flecks Resistant

2 Large necrotic flecks Resistant

3-4 Very small pustules/stripes surrounded by necrosis Resistant

5-6 Small and large pustules/stripes, necrotic and chlorotic flecks Intermediate

7 Large pustules/stripes with extensive chlorosis Susceptible

8 Large pustules/stripes with some chlorosis Susceptible

9 Large pustules/stripes with little or no chlorosis Susceptible

From reference: PARTIAL RESISTANCE TO STRIPE RUST AND ITS EFFECT ON

SUSTAINABILITY OF WHEAT YIELD, Pakistan J. Agric. Res. Vol. 27 No.3, 2014

Good Luck

Laith

Dear Laith Al-Ani  Thank you very much for your answer. I am currently using 0-9 scale proposed by Line and Qyaum 1992. That is also a very classical scale to assess yellow rust resistance. Here my focus is partial resistance. So i wonder exclduing 0-9 scale infection types, what parameters may be suitable and can help detect partial resistance?

Hi Hadi: you can measure the necrotic and clorotic reaction around the pustules, also you can measure the pustules size, amount of sporelation.   

Severity and reaction.

please find some article of ours.

wish you success.

Nusret Zencirci

Thank you dear Nusret Zencirci

Any time.

Hi Dr.Hadi

You are welcome and good luck