الفهرس 
Material and methodsOnly 14 pages are availabe for public view
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Abstract
SUMMARY
YIELD AND QUALI OF FLAX AS AFFECTED BY
VARIETY AND SOME ENVIRONMENTAL FACTORS
Flax ( Linum usitatissi um L.) ranked second in relation to fiber
crops in Egypt after cotton were it is grown as a dual purpose crop
(fiber and seed). Efforts are aid to increase flax production through
increasing the yield rather th through extending flax area. Also, the
agricultural policy is intending to improve the technological properties
of fibers and seeds through e introduction and breeding of new
varieties, characterized by high ielding potentiality.
that the productivity of any variety is
the result or outcome of th interaction between the genetical
constitution and environmental conditions. For that, flax should by
grown under suitable environm ntaJ conditions to achieve maximum
yield and best quality.
Therefore, six field expen ents were conducted during 1990/9 I
and 1991192 seasons at three ifferent regions i.e., Kafr EI-Sheikh
governorate representing North Delta(Sakha Agricultural Research
Station.), EI-Gharbia governorate representing Middle Delta (Gernmiza
Agricultural Research Station.) dEl-Giza governorate representing
North Upper Egypt (Giza Agric tural Research Station.) to evaluate
twelve flax genotypes including e four commercial varieties namely,
Giza 7, Giza 5, S.l19/2, S. 3/4, S.282/371I4/8, 5.402/3/3/5, Giza 8,
Giza 6, 5.2465/1, S.2651/2, .281120912/2 and 5.329/5/3.
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The recommended c tural practices for growing flax were
followed. A complete rando ’zed blocks design with four replications
in each region was used . An ysis of variance for each season in each
environment was followed d a combined analysis over the three
regions as well as over both s asons was done.
Results could be summarize as follows:
1. Results indicated t at genotypes under study significantly
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differed in relation 0 straw yield and its related characters.
Giza 7 variety wa significantly superior over the other
genotypes regardin total length, technical length, straw
yield per plant, stra yield per faddan as well as fiber yield
per faddan. While, 2465/1 significantly surpassed the other
genotypes in main st m diameter.
2. The three locations differed significantly concerning straw
yield and its co ponents. Kafr·EI-Sheikh governorate
favourably affected straw yield and its components as
compared- with EI-O bia and El-Giza governorates.
Also, EI-G ia was better than EI-Giza for
and fiber yields.
3. Results revealed th the climatic conditions during the first
season (1990/91) ere more favourable than those in the
second one (1991/9 ) in affecting all characters under study.
The differences wer significant between the two seasons in
all characters.
4. Results showed that genotype X environment had significant
effect on total stem ength, technical length, stem diameter,
straw yield/plant, str w yield/fad. and fiber yield/fad.
Also geno X season, significantly affected
technical length, ste diameter, straw yield/plant and fiber
yield/fad.
Environment and season interaction significantly
affected technical ltgth, stem diameter, straw yield/plant,
straw yield/fad. and *ber yield/fad.
The second order interaction significantly affected
technical length, stem diameter and straw yield/plant.
5. There were significant differences among genotypes under
study in relation to s . d yield and its related characters. Giza
8 variety ranked first regarding nwnber of capsules 1 plant ,
seed yield/plant, s ed index, seed yield/fad. and oil
yield/fad., followed by Giza 7 variety with the same
characters except seed index where, S.329/5/3 ranked
second after Giza 8 variety.
6. Results indicated s gnificant differences among the three
locations in relation to seed yield and its related characters.
Sakha location in afr-El-Sheikh governorate ranked first
for seed yield and i related characters. While EI-Gemmiza
location in EI-Ghar ia governorate ranked second in relation
to seed yield/plant d seed index and El-Giza governorate
ranked second cone ruing number of capsules/plant and seed
yield per fad.
7. The climatic condi ons during 1990/91 season were more
suitable than those’ 1991/92 season in affecting seed yield
and its componen s. The differences between the two
seasons were signifi ant in all characters except seed index.
8. The interaction etween genotype and environment
significantly affect number of capsules per plant, seed
yield per plant, se d yield per faddan and oil yield per
faddan.
Also, geno e X season significantly affected seed
yield per plant.
Environment X season had a significant effect on
number of capsules per plant, seed yield per faddan and oil
yield per faddan.
The second order interaction significantly affected
seed yield per fad, hereas other seed characters were not
significantlyaffecte
9. Genotypes under s dy significantly differed with regard to
technological chara ters. Giza 7 variety was significantly
superior to the ot er genotypes in each of long fiber
percentage, fiber Ie gth, fiber strength and fiber fineness.
While, Giza 8 v iety ranked first in relation to oil
percentage. On the other hand, Giza 6 variety ranked first
for iodine value foIl wed by Giza 5 and Giza 8 .
10. Sakha location in afr-EI-Sheikh governorate ranked first
concerning long fib percentage, fiber length, oil percentage
and iodine value. ereas EI-Gemmiza location in El-
Gharbia governorateranked first for fiber strength.
11. Results indicated at the climatic conditions of the first
season (1990/91) ere more favourable than those in the
second one (1991/9 ) in affecting technological characters
under study except ber strength where the second season
conditionsfavourabl
12. The interaction be een genotype and environment as well
as environment d season significantly affected all
technological charac ers, namely, long fiber percentage.fiber
length, fiber , fiber fineness, oil percentage and
iodinevalue.
Genotype X se on significantly affected fiber length,
fiber fineness and oil percentage.
Length, strength, fineness of fiber as well as oil
percentage were si .ficantly affected by the second order
interaction.
13. Genotypes S.24651, Giza 8, Giza 7, S.2465/l,
8.281/209/2/2, S.ll9 2, Giza 7 ranked first in relation to
total cross section, c rtex, fiber, xylem, pith, fiber bundle
areas and fiber index, espectively.
14. Genotypes Giza 8, 7, 5.2465/1 and Giza 8 were
significantly superior over the rest genotypes concerning
cortex percentage of ortex 1 cross section, percentage of
fiber 1 cross sect on, percentage of xylem Icross
section.percentage of ith / cross section, respectively.
15. Results indicated that Giza 7 variety ranked first regarding
number of fiber bundles / cross section, number of fiber cells
/ bundle, whereas S.2465/l ranked first with regard to fiber
cell area.
16. from the foregoing esults it could be concluded that for
producing the highes yield of straw with the best quality of
fibers, it is recomm nded to grow Giza 7 flax variety in
Kafr-EI-Sheikh gove orate and the neighboring regions and
to grow Giza 8 flax ariety to get the highest yield of seed
and oil in the same re ions.