This preprint is under consideration at Genetic Resources and Crop Evolution. A preprint is a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
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Research Article
Reyazul Rouf Mir
SKAUST-Kashmir
Corresponding Author
ORCiD: https://orcid.org/0000-0002-3196-211X
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The study involves evaluation of 96 wheat genotypes for early maturity and related traits and molecular characterization of trait specific candidate genotypes using 26 (20 random and 6 genic) SSR markers. Trait characterization revealed significant variation for early maturity and related traits. The analysis of genotypic data of 26 markers led to the detection of 166 alleles ranging from 2 to 8 alleles with an average of 3.8 alleles per locus. Separate analysis of genotypic data of 20 random and 06 trait specefic markers led to the identification of 118 and 51 alleles, respectively. Sub-population-wise allelic diversity in early and late maturing populations could detect a total of 167 and 144 alleles, respectively. Higher gene diversity was detected in early maturing sub-population (0.135) when compared to late maturing sub-population (0.071). Single marker analysis (SMA) revealed significant association of 05 random and 02 trait specific markers already reported for early maturity. Therefore, two trait specific markers (Xwmc1 and Xgwm271) have been validated during the present study and contributed 21.36% and 10.94% phenotypic variation for early maturity, respectively. In order to breed for early maturity for Western-Himalayas, F2 segregating populations were also developed by making crosses among spring × spring and spring × winter wheat genotypes and several important recombinants/ segregants for early maturity and related traits were identified. Overall, the findings of the present study will prove useful in future wheat improvement programs leading to development of early maturing wheat varieties.
Keywords
Bread Wheat, Early Maturity, SSRs, Allelic Diversity, Bi-parental Mapping Populations
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This preprint is under consideration at Genetic Resources and Crop Evolution. A preprint is a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Learn more about In Review
Research Article
Reyazul Rouf Mir
SKAUST-Kashmir
Corresponding Author
ORCiD: https://orcid.org/0000-0002-3196-211X
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Under Review
Version 1
Posted 01 Mar, 2021
No community comments so far
Reviews received
Received 26 Feb, 2021
Reviewers invited
Invitations sent on 26 Feb, 2021
Editor assigned
On 07 Feb, 2021
First submitted
On 06 Feb, 2021
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Agricultural Engineering
License:
This work is licensed under a CC BY 4.0 License. Read Full License
The study involves evaluation of 96 wheat genotypes for early maturity and related traits and molecular characterization of trait specific candidate genotypes using 26 (20 random and 6 genic) SSR markers. Trait characterization revealed significant variation for early maturity and related traits. The analysis of genotypic data of 26 markers led to the detection of 166 alleles ranging from 2 to 8 alleles with an average of 3.8 alleles per locus. Separate analysis of genotypic data of 20 random and 06 trait specefic markers led to the identification of 118 and 51 alleles, respectively. Sub-population-wise allelic diversity in early and late maturing populations could detect a total of 167 and 144 alleles, respectively. Higher gene diversity was detected in early maturing sub-population (0.135) when compared to late maturing sub-population (0.071). Single marker analysis (SMA) revealed significant association of 05 random and 02 trait specific markers already reported for early maturity. Therefore, two trait specific markers (Xwmc1 and Xgwm271) have been validated during the present study and contributed 21.36% and 10.94% phenotypic variation for early maturity, respectively. In order to breed for early maturity for Western-Himalayas, F2 segregating populations were also developed by making crosses among spring × spring and spring × winter wheat genotypes and several important recombinants/ segregants for early maturity and related traits were identified. Overall, the findings of the present study will prove useful in future wheat improvement programs leading to development of early maturing wheat varieties.
Figure 1
Figure 2
Figure 3
Figure 4
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