Abstract
Secale montanum is one of the important perennial grasses growingnaturally in arid to semiarid pastures and rangelands, with a typical Mediterraneanclimate, in northern and western Iran at altitudes of 800-2900 m. In this paper, seedstorage protein profiles of nine wild populations of S. montanum from differentregions of Iran and their phenotypically superior progenies as well as a multi-originpolycross (PLC) were studied. High levels of polymorphism were observed over allpopulations with the average number of bands and average heterozygosity. Superiorprogeny of different populations showed less genetic variability than wild parents interms of band diversity, whereas PLC samples showed extremely high values ofgenetic parameters. Two locally common bands were observed in almost all wildparent populations, which are missing in superior progeny of different populationsand PLC. These results provide highly support for the hypothesis that neutral geneticdiversity has been reduced or inadvertently lost via artificial selection. Among wildparent populations and their superior progenies significant differences were observedin expected heterozygosity suggesting that more intensive breeding practices mayhave resulted in a further erosion of genetic variability. Neighbor-joining clusteranalysis showed that wild populations and the phenotypically superior progeny ofdifferent populations were separated into two groups. This suggests that foundereffects and subsequent selection have had more effect on the genetic differentiationbetween these accessions than geographical separation. This technology, seed storageprotein profiling, has great potential for use in breeding programmes.
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Claims 9
Claim · model-written summary
High polymorphism was observed in all populations of Secale montanum.
- Taxon
- Secale montanum
Secale montanume0 - Outcome
- polymorphisme1
- Qualifier
- over all populationse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Secale montanum is one of the important perennial grasses”
e1“High levels of polymorphism were observed over all populations”
Claim · model-written summary
Superior progeny showed less genetic variability than wild parent populations.
- Taxon
- Secale montanumSecale montanume0
- Treatment
- Superior progenye2
- Outcome
- genetic variabilitye2
- Direction
- lesse2
- Comparator
- wild parentse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Secale montanum is one of the important perennial grasses”
e2“Superior progeny of different populations showed less genetic variability than wild parents”
Claim · model-written summary
PLC samples showed extremely high values of genetic parameters.
- Taxon
- Secale montanumSecale montanume0
- Treatment
- PLC samplese3
- Outcome
- genetic parameterse3
- Direction
- highe3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Secale montanum is one of the important perennial grasses”
e3“PLC samples showed extremely high values of genetic parameters”
Claim · model-written summary
Two locally common bands were present in almost all wild parent populations but missing in superior progeny and PLC.
- Taxon
- Secale montanumSecale montanume0
- Outcome
- locally common bandse4
- Qualifier
- missing in superior progeny of different populations and PLCe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Secale montanum is one of the important perennial grasses”
e4“Two locally common bands were observed in almost all wild parent populations, which are missing in superior progeny of different populations and PLC”
Claim · model-written summary
Expected heterozygosity differed significantly between wild parent populations and their superior progenies.
- Taxon
- Secale montanumSecale montanume0
- Outcome
- expected heterozygositye5
- Qualifier
- significant differencese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Secale montanum is one of the important perennial grasses”
e5“significant differences were observed in expected heterozygosity”
Claim · model-written summary
More intensive breeding practices may have caused a further erosion of genetic variability.
- Taxon
- Secale montanumSecale montanume0
- Treatment
- more intensive breeding practicese7
- Outcome
- a further erosion of genetic variabilitye6
- Direction
- decreaseinferrede6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Secale montanum is one of the important perennial grasses”
e6“a further erosion of genetic variability”
e7“more intensive breeding practices”
Claim · model-written summary
Founder effects and subsequent selection affected genetic differentiation more than geographical separation did.
- Taxon
- Secale montanumSecale montanume0
- Treatment
- subsequent selectione4
- Outcome
- genetic differentiatione4
- Direction
- higherinferrede4
- Comparator
- geographical separatione4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Secale montanum is one of the important perennial grasses”
e4“foundereffects and subsequent selection have had more effect on the genetic differentiation between these accessions than geographical separation”
Claim · model-written summary
Wild populations and superior progeny separated into two groups in neighbour-joining clustering.
- Taxon
- Secale montanumSecale montanume0
- Outcome
- separated into two groupse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Secale montanum is one of the important perennial grasses”
e7“showed that wild populations and the phenotypically superior progeny of different populations were separated into two groups”
Claim · model-written summary
Seed storage protein profiling has great potential for use in breeding programmes.
- Taxon
- Secale montanumSecale montanume0
- Outcome
- use in breeding programmese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Secale montanum is one of the important perennial grasses”
e5“This technology, seed storage protein profiling, has great potential for use in breeding programmes”