Abstract
Abstract The population growth and the regular breakout of Nilaparvata lugens pose a significant risk to rice cultivation. Four different N . lugens biotypes have been identified worldwide, with biotype 4 being the most destructive and prevalent throughout Asia, particularly in India. Therefore, a rice variety with multiple resistance genes/alleles is required for effective management of N . lugens . Hence, 191 rice genotypes collected from various parts of India were evaluated for resistance to N . lugens . Further, SSR markers representing 23 different N . lugens resistant (R) genes were assayed to identify genomic regions associated with resistance. The results of the genetic analysis showed that the average genetic diversity value of all markers was 0.165 and polymorphic information content of 0.145 for all the markers used. The population structure and cluster analysis divided the studied genotypes into three distinct groups, with resistant genotypes grouped separately. These findings were confirmed by the principal coordinate analysis, which categorized resistant genotypes, moderately resistant genotypes, and susceptible genotypes into distinct components. Additionally, 90% of the genetic variation was between individuals of populations and 10% between the populations. Marker‐trait association study through mixed linear model and generalized linear model identified six SSR markers such as RM6732 ( Bph15 ), RM314 ( Bph6 ), RM16999 ( Bph6 ), RM7 ( QBph3 ), RM401 ( bph4 ), and RM7102 ( Bph1 ), which were significantly associated with various phenotypic parameters, such as feeding mark, honeydew excretion, percent damage and nymphal survival. The resistant genes identified in these genotypes could help in the marker‐assisted rice variety development with durable resistance against N . lugens .
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Claims 8
Claim · model-written summary
Markers had average genetic diversity of 0.165.
Not reportedTaxon
Verbatim
e0“the average genetic diversity value of all markers was 0.165”
Claim · model-written summary
Markers had polymorphic information content of 0.145.
Not reportedTaxon
Verbatim
e0“polymorphic information content of 0.145 for all the markers used”
Claim · model-written summary
Population and cluster analysis divided genotypes into three groups with resistant genotypes separate.
- Outcome
- three distinct groups, with resistant genotypes grouped separatelye0
Not reportedTaxon
Verbatim
e0“The population structure and cluster analysis divided the studied genotypes into three distinct groups, with resistant genotypes grouped separately”
Claim · model-written summary
Principal coordinate analysis separated resistant, moderately resistant, and susceptible genotypes.
- Outcome
- resistant genotypes, moderately resistant genotypes, and susceptible genotypes into distinct componentse0
Not reportedTaxon
Verbatim
e0“principal coordinate analysis, which categorized resistant genotypes, moderately resistant genotypes, and susceptible genotypes into distinct components”
Claim · model-written summary
Genetic variation was 90% between individuals of populations.
Not reportedTaxon
Verbatim
e0“90% of the genetic variation was between individuals of populations”
Claim · model-written summary
Genetic variation was 10% between populations.
Not reportedTaxon
Verbatim
e0“10% between the populations”
Claim · model-written summary
Six SSR markers were significantly associated with planthopper resistance phenotypes.
- Taxon
- rice
Oryza sativat0 - Gene
- six SSR markerse0
- Outcome
- feeding mark, honeydew excretion, percent damagee0
Not reportedInteractorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“identified six SSR markers such as RM6732 ( Bph15 ), RM314 ( Bph6 ), RM16999 ( Bph6 ), RM7 ( QBph3 ), RM401 ( bph4 ), and RM7102 ( Bph1 ), which were significantly associated with various phenotypic parameters, such as feeding mark, honeydew excretion, percent damage and nymphal survival”
t0“Indica rice genotypes”
Claim · model-written summary
The identified resistance genes could aid development of durable resistant rice varieties.
- Taxon
- riceOryza sativae0
- Interactor
- N . lugens
Nilaparvata lugense0pest - Outcome
- marker‐assisted rice variety development with durable resistancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The resistant genes identified in these genotypes could help in the marker‐assisted rice variety development with durable resistance against N . lugens”