Differences among different method.pdf


Preview of PDF document differences-among-different-method.pdf

Page 1 2 3 4 5 6

Text preview


M@hbub 2

Comparison among clones, purelines and inbreds
Particulars

Clone

1) Mode of

Pureline

Inbred

Cross pollination.

Self pollination

Cross pollination

Asexual

Sexual

Sexual

Heterozygous

Homozygous

Heterozygous

4) Obtained

Asexual

Natural self

Arti cial self pollination or

through

reproduction from

pollination from a

close inbreeding and

a single plant.

single homozygous

Selection for several

plant.

generation.

pollination
2) Nature of
reproduction.
3) Genetic
make-up

5) Maintained

Asexual

Natural self

Arti cial self pollination or

through

reproduction

pollination

close inbreeding.

6) Genotypically

Identical

Identical

Almost identical

7) Used directly

Yes

Yes

No

Plants

Plants

Plants, animal

as a variety
8) Organism
where found.

Distinguish between Biotic & Abiotic Stress
Biotic stress

Abiotic stress

1. Biotic stress include living organism. 1. Abiotic stress include physical factors of
e.g. insect, pest, bacteria, fungi etc.

environment.

e.g.

Temperature,

moisture,

wind, soil salinity and alkalinity etc.
2. The e ect of biotic stress is changeable.

2. The e ect of abiotic stress is stable.

3. The e ect of biotic stress is density

3. Density independent.

dependent.
4. Directly related to stress.

4. Indirectly related to stress.

5. Generally man can control it such as 5. Generally man can not control it. e.g. high
spraying insecticides in case of insect.

temperature beyond the control of stress.

Genetics and plant breeding