scholarly journals Identification of blast  resistance QTLs based on  two ad vanced backcross populations in rice

2020 ◽  
Author(s):  
Haichao Jiang ◽  
Yutao Feng ◽  
Lei Qiu ◽  
Guanjun Gao ◽  
Qinglu Zhang ◽  
...  
Keyword(s):  
Phenotypic Variation ◽  
Rice Blast ◽  
Blast Resistance ◽  
Natural Infection ◽  
Rice Variety ◽  
Resistance Qtls ◽  
Backcross Population ◽  
Advanced Backcross ◽  
Minor Qtls ◽  
Advanced Backcross Population

Abstract Background: Rice blast is an economically important and mutable disease of rice. Using host resistance gene to breed resistant varieties has been proven to be the most effective and economical method to control rice blast and new resistance genes or quantitative trait loci (QTLs) are then needed.Results: In this study, we constructed two advanced backcross population to mapping blast resistance QTLs. CR071 and QingGuAi3 were as the donor parent to establish two BC3F1 and derived BC3F2 backcross population in the Jin23B background. By challenging the two populations with natural infection in 2011 and 2012, 16 and 13 blast resistance QTLs were identified in Jin23B/CR071 and Jin23B/QingGuAi3 population, respectively. Among Jin23B/CR071 population, 3 major and 13 minor QTLs have explained the phenotypic variation from 3.50% to 34.08% in two years. And, among Jin23B/QingGuAi3 population, 2 major and 11 minor QTLs have explained the phenotypic variation from 2.42% to 28.95% in two years.Conclusions: Sixteen and thirteen blast resistance QTLs were identified in Jin23B/CR071 and Jin23B/QingGuAi3 population, respectively. QTL effect analyses suggested that major and minor QTLs interaction is the genetic basis for durable blast resistance in rice variety CR071 and QingGuAi3.

scholarly journals Identification of blast  resistance QTLs based on  two ad vanced backcross populations in rice

2020 ◽  
Author(s):  
Haichao Jiang ◽  
Yutao Feng ◽  
Lei Qiu ◽  
Guanjun Gao ◽  
Qinglu Zhang ◽  
...  
Keyword(s):  
Phenotypic Variation ◽  
Rice Blast ◽  
Blast Resistance ◽  
Natural Infection ◽  
Rice Variety ◽  
Resistance Qtls ◽  
Backcross Population ◽  
Advanced Backcross ◽  
Minor Qtls ◽  
Observation Times

Abstract Background: Rice blast is an economically important and mutable disease of rice. Using host resistance gene to breed resistant varieties has been proven to be the most effective and economical method to control rice blast and new resistance genes or quantitative trait loci (QTLs) are then needed.Results: In this study, we constructed two advanced backcross population to mapping blast resistance QTLs. CR071 and QingGuAi were as the donor parent to establish two BC3F1 and derived BC3F2 backcross population in the Jin23B background. By challenging the two populations with natural infection in 2011 and 2012, 16 and 13 blast resistance QTLs were identified in Jin23B/CR071 and Jin23B/QingGuAi population, respectively. Among Jin23B/CR071 population, 3 major and 13 minor QTLs have explained the phenotypic variation from 3.50% to 34.08% during six observation times. And, among Jin23B/QingGuAi population, 2 major and 11 minor QTLs have explained the phenotypic variation from 2.42% to 28.95% during six observation times.Conclusions: Sixteen and thirteen blast resistance QTLs were identified in Jin23B/CR071 and Jin23B/QingGuAi population, respectively. QTL effect analyses suggested that major and minor QTLs interaction is the genetic basis for durable blast resistance in rice variety CR071 and QingGuAi.

scholarly journals Identification of blast resistance QTLs based on two advanced backcross populations in rice

2020 ◽  
Author(s):  
Haichao Jiang ◽  
Yutao Feng ◽  
Lei Qiu ◽  
Guanjun Gao ◽  
Qinglu Zhang ◽  
...  
Keyword(s):  
Phenotypic Variation ◽  
Rice Blast ◽  
Blast Resistance ◽  
Rice Variety ◽  
Resistance Qtls ◽  
Backcross Population ◽  
Advanced Backcross ◽  
Minor Qtls ◽  
Backcross Populations ◽  
Observation Times

Abstract Background: Rice blast is an economically important and mutable disease of rice. Using host resistance gene to breed resistant varieties has been proven to be the most effective and economical method to control rice blast and new resistance genes or quantitative trait loci (QTLs) are then needed. Results: In this study, we constructed two advanced backcross population to mapping blast resistance QTLs. CR071 and QingGuAi were as the donor parent to establish two BC 3 F 1 and derived BC 3 F 2 backcross populations in the Jin23B background. By challenging the two populations with natural infection in 2011 and 2012, 16 and 13 blast resistance QTLs were identified in Jin23B/CR071 and Jin23B/QingGuAi population, respectively. Among Jin23B/CR071 population, 3 major and 13 minor QTLs have explained the phenotypic variation from 3.50% to 34.08% during six observation times. And, among Jin23B/QingGuAi population, 2 major and 11 minor QTLs have explained the phenotypic variation from 2.42% to 28.95% during six observation times. Conclusions: Sixteen and thirteen blast resistance QTLs were identified in Jin23B/CR071 and Jin23B/QingGuAi population, respectively. QTL effect analyses suggested that major and minor QTLs interaction is the genetic basis for durable blast resistance in rice variety CR071 and QingGuAi.

Association between molecular markers and blast resistance in an advanced backcross population of rice

2003 ◽  
Vol 108 (6) ◽  
pp. 1024-1032 ◽  
Author(s):  
J.-L. Wu ◽  
P. K. Sinha ◽  
M. Variar ◽  
K.-L. Zheng ◽  
J. E. Leach ◽  
...  
Keyword(s):  
Molecular Markers ◽  
Blast Resistance ◽  
Backcross Population ◽  
Advanced Backcross ◽  
Advanced Backcross Population

scholarly journals Level of Endogenous Jasmonate is Critical for Durable Broad-Spectrum Disease Resistance Against Rice Blast in a Japonica Rice Variety, Ziyu44

2021 ◽  
Author(s):  
Xingyu An ◽  
Hui Zhang ◽  
Jinlu Li ◽  
Rui Yang ◽  
Qianchun Zeng ◽  
...  
Keyword(s):  
Disease Resistance ◽  
Signaling Pathway ◽  
Broad Spectrum ◽  
Rice Blast ◽  
Blast Resistance ◽  
Rice Variety ◽  
Blast Disease ◽  
Japonica Rice ◽  
Mycelium Growth ◽  
Broad Spectrum Resistance

Abstract Background: The molecular mechanism of durable and broad-spectrum resistance to rice blast disease in japonica rice variety is still very little known. Ziyu44, a local japonica rice variety in Yunnan Province of China, has shown durable broad-spectrum blast resistance for more than 30 years, and provides an opportunity for us to explore the molecular basis of broad-spectrum resistance to rice blast in japonica rice variety.Methods and Results: We conducted a comparative study of mycelium growth, aposporium formation, the accumulation of salicylate(SA), jasmonate(JA) and H2O2, the expression of SA- and JA-associated genes between Ziyu44 and susceptible variety Jiangnanxiangnuo (JNXN) upon M. oryzae infection. We found that appressorium formation and invasive hyphae extention were greatly inhibited in Ziyu 44 leaves compared with that in JNXN leaves. Both Ziyu 44 and JNXN plants maintained high levels of baseline SA and did not show increased accumulation of SA after inoculation with M. oryzae, while the levels of baseline JA in Ziyu 44 and JNXN plants were relatively low, and the accumulation of JA exhibited markedly increased in Ziyu 44 plants upon M. oryzae infection. The expression levels of key genes involving JA and SA signaling pathway OsCOI1b, OsNPR1, OsMPK6 as well as pathogenesis-related (PR) genes OsPR1a, OsPR1b and OsPBZ1, were markedly up-regulated in Ziyu44. Conclusions: The level of endogenous JA is critical for synchronous activation of SA and JA signaling pathway, up-regulating PR gene expression and enhancing disease resistance against rice blast in Ziyu44.

The use of MapPop1.0 for choosing a QTL mapping sample from an advanced backcross population

2007 ◽  
Vol 114 (6) ◽  
pp. 1019-1028 ◽  
Author(s):  
C. Birolleau-Touchard ◽  
E. Hanocq ◽  
A. Bouchez ◽  
C. Bauland ◽  
I. Dourlen ◽  
...  
Keyword(s):  
Qtl Mapping ◽  
Backcross Population ◽  
Advanced Backcross ◽  
Advanced Backcross Population
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