Registration of ‘Katy’ Rice

Moldenhauer, K. A. K.; Lee, F. N.; Norman, Richard; Helms, R. S.; Wells, B. R.; Dilday, R. H.; Rohman, P. C.; Marchetti, M. A.

doi:10.2135/cropsci1990.0011183x003000030065x

Cited by 66 publications

(54 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similarly, the presence of a large Tetep segment on chromosome 12 was consistent with the fact that Tetep was the progenitor for Katy, and the presence of a large Katy segment on chromosome 12 in Madison, Drew, and Kaybonnet was consistent with the fact that Katy was the progenitor for them (Moldenhauer et al, 1990(Moldenhauer et al, , 1998Gravois et al, 1995;McClung et al, 1999). In fact, these cultivars were developed by different breeding methods at different times.…”

Section: Y Jiasupporting

confidence: 61%

“…By selecting for blast resistance, the introgressed fragment revealed in backcrossing progeny represented approximately half and in some cases, the entire rice chromosome 12. Additionally, the large introgression of similar genomic fragments was found in cultivars Katy, Madison, Drew, and Kaybonnet all of which were selected to contain resistance to the race IB49 of M. oryzae that have AVR-Pita during breeding (Moldenhauer et al, 1990(Moldenhauer et al, , 1998Gravois et al, 1995;McClung et al, 1999). All resistant backcrossing lines were found to harbor the Pi-ta locus, suggesting that Pi-ta-mediated resistance was selected although it was unclear how many other blast R genes might have been selected.…”

Section: Y Jiamentioning

confidence: 99%

“…The blast R gene, Pi-ta is known to prevent infections by races of M. oryzae that contain AVR-Pita (Bryan et al, 2000;Orbach et al, 2000;Jia et al, 2004;Zhou et al, 2007). The resistant cultivar Katy released in the 1990s inherited the major blast R gene Pi-ta from a Vietnamese landrace indica variety Tetep (Moldenhauer et al, 1990). Since then, Katy has been used as the Pi-ta donor in the development of the resistant cultivars Kaybonnet, Drew, and Madison (Moldenhauer et al, 1990;Gravois et al, 1995;Moldenhauer et al, 1998;McClung et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

“…The resistant cultivar Katy released in the 1990s inherited the major blast R gene Pi-ta from a Vietnamese landrace indica variety Tetep (Moldenhauer et al, 1990). Since then, Katy has been used as the Pi-ta donor in the development of the resistant cultivars Kaybonnet, Drew, and Madison (Moldenhauer et al, 1990;Gravois et al, 1995;Moldenhauer et al, 1998;McClung et al, 1999). In Japan, indica landrace Tadukan from the Philippines was used as the Pi-ta donor (Shigemura and Kitamura, 1954).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Artificial introgression of a large chromosome fragment around the rice blast resistance gene Pi-ta in backcross progeny and several elite rice cultivars

Jia

2009

Heredity

View full text Add to dashboard Cite

Studying the size of genomic introgressions should lead to a better understanding of linkage disequilibrium in crop breeding. In this study, progeny of the cross between a tropical japonica rice cultivar Katy containing the rice blast resistance gene Pi-ta and a temperate japonica cultivar M202 (Pi-ta) were inoculated with the race IB49 of Magnaporthe oryzae that recognizes Pi-ta. The resistant progeny were identified during backcrossing for five generations. Two progeny of each of the 22 BC 5 F 1 were genotyped using 12 simple sequence repeat markers around the Pi-ta genomic region on chromosome 12. Unlinked DNA in 43 BC 5 F 2 individuals was found primarily from the recurrent parent M202 as expected. However, unexpectedly, various sizes of genomic fragments around Pi-ta ranging from half (14 Mbp) to the entire chromosome (27 Mbp) were found from the donor. Similarly, large segments of comparable sizes of the Pi-ta genomic region originating from a landrace indica variety Tetep from Vietnam were also identified in Pi-ta containing US rice cultivars, Katy, Madison, Kaybonnet, and Drew. It was also determined that Tetep had an identical chromosome 12 to another landrace cultivar Tadukan from the Philippines. The most widely grown indica cultivar IR64 was found to contain the same 6.4 Mbp around Pi-ta. This study demonstrates that a large portion of the chromosome was maintained by artificial selection for blast resistance during crop breeding.

show abstract

Section: Y Jiasupporting

confidence: 61%

Section: Y Jiamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Artificial introgression of a large chromosome fragment around the rice blast resistance gene Pi-ta in backcross progeny and several elite rice cultivars

Jia

2009

Heredity

View full text Add to dashboard Cite

show abstract

“…Early reports indicated that the Pi-ta gene was introgressed into elite cultivars from landrace indica cultivars (e.g. Tetep and Taducan) for the control of infection by races of M. oryzae that contain AVR-Pita (Jia and Martin, 2008;Kiyosawa, 1967;Moldenhauer et al, 1990). Pi-ta locus has been effectively utilized to prevent blast disease for the past 40 years and is still effectively used in more rice cultivation areas (Kiyosawa 1967, Jia et al, 2004, Barman et al, 2004, Jia and Valent 2007.…”

Section: Discussionmentioning

confidence: 99%

Rice grain quality as affected by blast-causing agent (Pyricularia oryzae) along with a molecular analysis of blast resistance at Pi5 and Pi-ta loci

Ahmadikhah¹,

Khosravi²

2018

Aust J Crop Sci

View full text Add to dashboard Cite

Blast disease is the most devastating disease of rice worldwide, which reduces both quantity and quality of rice production. To assess the effect of fungal agent of blast, Pyricularia oryzae, on some aspects of grain quality of rice, 31 rice cultivars (including 20 local landraces) were evaluated at seedling and post-harvest stages. The cultivars were grown in three replicates in a field surrounded by blast spreader cultivars and at appropriate times blast infection type, grain infection, 100-grain weight and grain quality traits (percentage of broken rice and number of chalky seeds per panicle) were evaluated. For tracking alleles of two major blast resistance genes (including Pi5 and Pi-ta) the respective primer pairs were applied in a polymerase chain reaction (PCR) on DNA of the studied cultivars. Evaluation of blast infection type at seedling stage showed that four cultivars were completely resistant, 4 cultivars moderately resistant and 23 cultivars mainly consisted of local landraces were susceptible. Fungal treatment had significant effects on percentages of grain infection and broken rice and not on number of chalky seeds or 100-grain weight. Rice genotypes had significant differences in grain infection and also in 100-grain weight and in two quality traits including percentage of broken rice and number of chalky seeds. Most local landraces showed highest grain infection (14.4-17.6%) compared to improved modern varieties with lowest grain infection (1.3-2.7%). Results also showed that genotype by fungal treatment interaction were only significant for grain infection and broken rice. All susceptible cultivars had higher broken rice relative to resistant cultivars (10.5-13.3% vs. 2.1-4.6%) after blast infection. Molecular survey showed that most susceptible local landraces carry Pi5 dominant allele, while high-yielding modern cultivars don't carry the allele, indicating that Pi5 does not play a significant role in blast resistance at this time. Furthermore, molecular survey showed that only three cultivars including a local cultivar (Tetep) and two modern ones (IR56, IR24) harbored Pi-ta allele, and Pi-ta explained a high part of variation of blast resistance (R 2 =53.7%). These results indicate the importance of Pi-ta gene for improving rice blast-resistance and grain quality at blast infection conditions.

show abstract

Registration of a blast‐resistant premium medium‐grain rice germplasm Eclipse

Jia

2022

J of Plant Registrations

View full text Add to dashboard Cite

show abstract

Registration of ‘Katy’ Rice

Cited by 66 publications

References 0 publications

Artificial introgression of a large chromosome fragment around the rice blast resistance gene Pi-ta in backcross progeny and several elite rice cultivars

Artificial introgression of a large chromosome fragment around the rice blast resistance gene Pi-ta in backcross progeny and several elite rice cultivars

Rice grain quality as affected by blast-causing agent (Pyricularia oryzae) along with a molecular analysis of blast resistance at Pi5 and Pi-ta loci

Registration of a blast‐resistant premium medium‐grain rice germplasm Eclipse

Contact Info

Product

Resources

About