Abstract
Three varieties of wheat were treated with different dosages of x rays, beta particles from P/sup 32/ and S/sup 35/, and fast and thermal neutrons to ascertain the effects of polyploidy on sensitivity to these radiations. Dry seeds or seeds with 21% moisture content were treated, and observations were recorded in X/sub 1/, X/sub 2/, and X/sub 3/ progenies. The percentage of survival increased with an increase in chromosome number. Pre-soaking in water led to an increase in mortality as compared to the irradiation of dry seeds up to a dosage of 22,000 r of x rays, but beyond this dosage pre-soaking increased the survival percentage. The development of several improved varieties of bread wheat is reported. Applications of the findings in plant breeding programs are discussed. (C.H.)
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Claims 4
Claim · model-written summary
Survival increased with chromosome number in irradiated wheat.
- Taxon
- wheat
Triticum aestivume1 - Treatment
- x rayse1
- Outcome
- percentage of survivale0
- Direction
- increasede0
- Qualifier
- chromosome numbere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The percentage of survival increased with an increase in chromosome number”
e1“Three varieties of wheat were treated with different dosages of x rays, beta particles from P/sup 32/ and S/sup 35/, and fast and thermal neutrons”
Claim · model-written summary
Pre-soaking increased mortality relative to dry-seed irradiation up to 22,000 r of x rays.
- Taxon
- wheatTriticum aestivume1
- Treatment
- Pre-soaking in watere0
- Outcome
- mortalitye0
- Direction
- increasee0
- Qualifier
- up to a dosage of 22,000 r of x rayse0
- Comparator
- irradiation of dry seedse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pre-soaking in water led to an increase in mortality as compared to the irradiation of dry seeds up to a dosage of 22,000 r of x rays”
e1“Three varieties of wheat were treated”
Claim · model-written summary
Above 22,000 r of x rays, pre-soaking increased wheat survival.
- Taxon
- wheatTriticum aestivume2
- Treatment
- pre-soakinge0
- Outcome
- survival percentagee0
- Direction
- increasede0
- Qualifier
- beyond this dosagee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“beyond this dosage pre-soaking increased the survival percentage”
e1“up to a dosage of 22,000 r of x rays”
e2“Three varieties of wheat were treated”
Claim · model-written summary
Several improved bread wheat varieties were developed.
- Taxon
- bread wheatTriticum aestivume0
- Outcome
- development of several improved varietiese0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The development of several improved varieties of bread wheat is reported”