Delimitation of thePSH1(t) gene for rice purple leaf sheath to a 23.5 kb DNA fragment

Genome ◽  
2009 ◽  
Vol 52 (3) ◽  
pp. 268-274 ◽  
Author(s):  
Wen-Ying Wang ◽  
Han-Feng Ding ◽  
Guang-Xian Li ◽  
Ming-Song Jiang ◽  
Run-Fang Li ◽  
...  

Leaf sheath color plays an important role as a marker for rice genetic improvement. A recombinant inbred line (RIL) population consisting of 220 individuals was developed from a cross between an Oryza sativa subsp. indica variety, IRBB60, and an Oryza sativa subsp. japonica variery, 9407. Within the RIL population, a line, RI51, was found to have purple leaf sheath (PSH). To map the gene governing PSH, RI51 was crossed with 9407 green leaf sheath (GSH) to develop an F2segregating population. The distribution of F2plants with PSH and GSH fitted a segregation ratio of 3:1, indicating that the PSH was controlled by a major dominant gene. The gene locus for PSH, tentatively designated as PSH1(t), was identified by surveying two bulks made of the respective 40 individuals with PSH and GSH with SSR markers covering the entire rice genome. The survey indicated that the PSH1(t) region was located on chromosome 1. Further confirmation was made using a large random sample of 360 individuals from the same F2population and the PSH1(t) locus was then mapped on chromosome 1 between SSR markers RM3475 and RM7202 with genetic distances of 2.0 and 1.1 cM, respectively. For fine mapping of PSH1(t), a large F2:3segregating population with 3300 individuals from the seven heterozygous F2plants in the RM3475–RM7202 region was constructed. Analysis of recombinants in the PSH1(t) region anchored the gene locus to an interval of 23.5 kb flanked by the left marker L03 and the right marker L05. Sequence analysis of this fragment predicted six open reading frames encoding a putative trans-sialidase, a putative Plastidic ATP/ADP-transporter, and four unknown proteins. The detailed genetic and physical maps of the PSH1(t) locus will be very useful in molecular cloning of the PSH1(t) gene.

2008 ◽  
Vol 90 (5) ◽  
pp. 397-407 ◽  
Author(s):  
KULJIT K. CHEEMA ◽  
NAVJIT K. GREWAL ◽  
YOGESH VIKAL ◽  
RAJIV SHARMA ◽  
JAGJEET S. LORE ◽  
...  

SummaryBacterial blight (BB) of rice caused by Xanthomonas oryzae pv oryzae (Xoo) is one of the major constraints to productivity in South-East Asia. The strategy of using major genes, singly or in combination, continues to be the most effective approach for BB management. Currently, more than two dozen genes have been designated but not all the known genes are effective against all the prevalent pathotypes. The challenge, therefore, is to continue to expand the gene pool of effective and potentially durable resistance genes. Wild species constitute an important reservoir of the resistance genes including BB. An accession of Oryza nivara (IRGC 81825) was found to be resistant to all the seven Xoo pathotypes prevalent in northern states of India. Inheritance and mapping of resistance in O. nivara was studied by using F2, BC2F2, BC3F1 and BC3F2 progenies of the cross involving Oryza sativa cv PR114 and the O. nivara acc. 81825 using the most virulent Xoo pathotype. Genetic analysis of the segregating progenies revealed that the BB resistance in O. nivara was conditioned by a single dominant gene. Bulked segregant analysis (BSA) of F2 population using 191 polymorphic SSR markers identified a ∼35 centiMorgans (cM) chromosomal region on 4L, bracketed by RM317 and RM562, to be associated with BB resistance. Screening of BC3F1 and BC2F2 progenies and their genotyping with more than 30 polymorphic SSR markers in the region, covering Bacterial artificial chromosome (BAC) clone OSJNBb0085C12, led to mapping of the resistance gene between the STS markers based on annotated genes LOC_Os04g53060 and LOC_Os04g53120, which is ∼38·4 kb. Since none of the known Xa genes, which are mapped on chromosome 4L, are effective against the Xoo pathotypes tested, the BB resistance gene identified and transferred from O. nivara is novel and is tentatively designated as Xa30(t). Homozygous resistant BC3F3 progenies with smallest introgression region have been identified.


2012 ◽  
Vol 37 (11) ◽  
pp. 1967-1974 ◽  
Author(s):  
Li HUANG ◽  
Xin-Yan ZHAO ◽  
Wen-Hua ZHANG ◽  
Zhi-Ming FAN ◽  
Xiao-Ping REN ◽  
...  

PLoS ONE ◽  
2018 ◽  
Vol 13 (1) ◽  
pp. e0190670 ◽  
Author(s):  
Pengcheng Li ◽  
Cancan Du ◽  
Yingying Zhang ◽  
Shuangyi Yin ◽  
Enying Zhang ◽  
...  

2014 ◽  
Vol 13 (35) ◽  
pp. 3547-3552 ◽  
Author(s):  
Umadevi M. ◽  
Veerabadhiran P. ◽  
Manonmani S.

2011 ◽  
Vol 24 (1) ◽  
pp. 33-40
Author(s):  
M. J. Hasan ◽  
M. U. Kulsum ◽  
A. Ansari ◽  
A. K. Paul ◽  
P. L. Biswas

Inheritance of fertility restoration was studied in crosses involving ten elite restorer lines of rice viz. BR6839-41-5-1R, BR7013-62-1-1R, BR7011-37-1-2R, BR10R, BR11R, BR12R, BR13R, BR14R, BR15R and BR16R and one male sterile line Jin23A with WA sources of cytoplasmic male sterility. The segregation pattern for pollen fertility of F2 and BC1 populations of crosses involving Jin23A indicated the presence of two independent dominant fertility restoring genes. The mode of action of the two genes varied in different crosses revealing three types of interaction, i.e. epistasis with dominant gene action, epistasis with recessive gene action, and epistasis with incomplete dominance.DOI: http://dx.doi.org/10.3329/bjpbg.v24i1.16997


Genome ◽  
2008 ◽  
Vol 51 (11) ◽  
pp. 922-927 ◽  
Author(s):  
P. G. Luo ◽  
X. Y. Hu ◽  
Z. L. Ren ◽  
H. Y. Zhang ◽  
K. Shu ◽  
...  

Stripe rust, caused by Puccinia striiormis Westend f. sp. tritici, is one of the most important foliar diseases of wheat ( Triticum aestivum L.) worldwide. Stripe rust resistance genes Yr27, Yr31, YrSp, YrV23, and YrCN19 on chromosome 2BS confer resistance to some or all Chinese P. striiormis f. sp. tritici races CYR31, CYR32, SY11-4, and SY11-14 in the greenhouse. To screen microsatellite (SSR) markers linked with YrCN19, F1, F2, and F3 populations derived from cross Ch377/CN19 were screened with race CYR32 and 35 SSR primer pairs. Linkage analysis indicated that the single dominant gene YrCN19 in cultivar CN19 was linked with SSR markers Xgwm410, Xgwm374, Xwmc477, and Xgwm382 on chromosome 2BS with genetic distances of 0.3, 7.9, 12.3, and 21.2 cM, respectively. Crosses of CN19 with wheat lines carrying other genes on chromosome 2B showed that all were located at different loci. YrCN19 is thus different from the other reported Yr genes in chromosomal location and resistance response and was therefore named Yr41. Prospects and strategies of using Yr41 and other Yr genes in wheat improvement for stripe rust resistance are discussed.


2009 ◽  
Vol 8 (4) ◽  
pp. 482-487 ◽  
Author(s):  
Gui-lian ZHANG ◽  
Li-yun CHEN ◽  
Guo-ying XIAO ◽  
Ying-hui XIAO ◽  
Xin-bo CHEN ◽  
...  

2021 ◽  
pp. 125-133
Author(s):  
Г.Ю. Спотарь ◽  
С.А. Блинова ◽  
А.А. Шварцев ◽  
Я.И. Алексеев ◽  
С.М. Гориславец

С помощью молекулярно-генетических и ампелографических методов проведена идентификация сортов винограда, относящихся к наиболее распространенным в мире техническим сортам западно-европейского происхождения. Генотипирование образцов проводилось с использованием 9-ядерных и 3-хлоропластных микросателлитных маркеров. На основании полученных профилей, по данным базы VIVC было установлено, что образец № 2 является сортом Каберне-Совиньон, образец № 4 - сортом Рисланер. Профиль образца № 1 совпадает с профилем сорта Мерло, за исключением разницы в двух парах нуклеотидов (п.н.) в одном аллеле локуса VVMD27, что можно объяснить редким случаем мутации в микросателлитной последовательности и не является достаточным основанием утверждать, что образец № 1 и Мерло являются разными сортами. Генетические профили образцов № 3 и № 6 соответствовали сортам сортогруппы Темпранильо, № 5 - сортам сортогруппы Рислинг рейнский, №7 - сортам сортогруппы Пино черный. Сорта в сортогруппах, полученные в результате соматических мутаций (связанных в основном с окраской ягод), имели одинаковый профиль. Принадлежность образцов к указанным сортам в сортогруппах была подтверждена ампелографическим методом. Использование для идентификации сортов в сортогруппах 6-9-ти SSR-маркеров в сочетании с ампелографическими методами позволяет получить достоверные результаты без удорожания работ. Однако дифференциация клонов и сортов, полученных в результате соматических мутаций, только SSR-маркерами потребует значительного увеличения их количества на 1-2 порядка либо использования высоковариабельных SSR-маркеров, таких как VRG ( Vitis riparia Götzhof). Таким образом, целесообразен более целенаправленный поиск полиморфизмов непосредственно в генах, отвечающих за определенные хозяйственно ценные признаки. В случае возникновения отличия в окраске ягод для дифференциации возможно использовать полиморфизм локуса гена VvMybA1, при изменении во вкусе и аромате ягод - в локусе гена VviDXS, при изменении лигнификации семян - в локусе гена VviAGL11, при повышении устойчивости к заболеваниям - в локусах соответствующих генов резистентности. The identification of grapes related to the most widespread wine varieties of West-European origin was carried out using molecular-genetic and ampelographic methods. Genotyping of samples was provided using 9- nuclear and 3-chloroplast microsatellite markers. Basing on the profiles obtained according to the VIVC database, it was established that Sample No. 2 is a ‘Cabernet-Sauvignon’ variety, and Sample No. 4 is a ‘Rieslaner’ variety. The profile of Sample No. 1 coincides with the ‘Merlot’ profile, except for the difference in 2 base pairs (bp) in one allele of the VVMD27 locus, which can be explained by a rare case of mutation in microsatellite sequence, and is not a sufficient reason to insist that Sample No. 1 and the ‘Merlot’ are different varieties. The genetic profiles of Samples No. 3 and No. 6 corresponded to the varieties of ‘Tempranillo’ group, No. 5 - to the varieties of ‘Rhein Riesling’ group, and No. 7 - to the varieties of ‘Pinot Noir’ group. The varieties of the groups, obtained as a result of somatic mutations (mainly associated with color of berries), had the same profile. The ampelographic method confirmed the origin of samples in the mentioned groups of varieties. Using of 6-9-SSR-markers in combination with ampelographic methods to identify the varieties of groups allows obtaining reliable results without increasing the cost of work. However, differentiation of clones and varieties in groups with only SSR-markers will require a significant increase in their number by 1-2 orders, or using of highly variable SSR-markers, such as VRG ( Vitis riparia Götzhof). Thus, a more targeted search for polymorphisms directly in genes responsible for certain economically valuable traits is advisable. In case of occurrence a difference in the color of berries, it is possible to use for differentiation the polymorphism of VvMybA1 gene locus, when flavor and aroma of berries change - to use the VviDXS gene locus, when seed lignification changes - the VviAGL11 gene locus, when disease resistance increases - the loci of the corresponding resistance genes.


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