scholarly journals Gene mapping and candidate gene analysis of a novel watermelon lesion mimic mutant clalm

Author(s):  
wei dong ◽  
kai liu ◽  
de feng wu ◽  
Guo Jinggong

Abstract The leaf is an extremely important plant organ exhibiting a broad range of phenotypic variation. In watermelon (Citrullus lanatus), leaf spotting is a rare, valuable trait that can be used by breeders for selection at early growth stages. In this study, we tested a seven-generation family to determine the inheritance and genetic basis of this trait. As revealed by analysis of the lesion mimic mutant clalm, leaf spotting is controlled by a single dominant gene. Whole genome resequencing–bulked segregant analysis demonstrated that this gene is located on chromosome 4 from 3,760,000 bp to 7,440,000 bp, a region corresponding to a physical distance of 3.68 Mb encompassing approximately 72 annotated genes and eight non-synonymous coding SNPs. According to quantitative real-time PCR analysis, the expression level of ClCG04G001930 was significantly lower in the clalm mutant than in normal watermelon. The predicted target gene, ClCG04G001930, encodes a fatty acid amide hydrolase protein that regulates a variety of neurobehavioral processes in animals. Twelve-five SNPs were identified in the ClCG04G001930 gene of F2 individuals of the clalm mutant. RNA interference of the ClCG04G001930 gene, designated as ClPAD4, yielded transgenic lines whose leaves gradually developed chlorotic lesions over 3 weeks. Our results suggest that ClPAD4 is the gene responsible for leaf spotting in the clalm mutant. Our findings may serve as a foundation for elucidating the mechanism underlying the spotted leaf trait and should be useful for marker-assisted selection breeding in watermelon.

2019 ◽  
Vol 19 (4) ◽  
pp. 979-989
Author(s):  
Essa Dirandeh ◽  
Zarbakht Ansari-Pirsaraei ◽  
Hamid Deldar

AbstractThere are several findings indicating that the endocannabinoid system (ECS) is an important factor, acting in multiple ways in regulating reproductive function but changes of this system in the bovine endometrium have rarely been investigated; therefore, this study was designed to consider an association between endometrial ECS expression and different stages of the estrous cycles. MRNA expressions of the ECS were investigated during the late luteal phase and estrus using real-time PCR. Following estrous synchronization of sixteen Holstein dairy cows (34±1.3 kg/day of milk production), using two PGF2α injections given 14 days apart, at 30 and 44 days in milk (DIM), blood samples and ultrasonography (US) were performed every other day from the day of second PGF2α injection (44 DIM) until the start of the next estrous cycle (67±2 DIM) to verify CL development and ovulation. Based on blood and US results endometrial tissue was collected on days 16 (late luteal phase) and 21 (estrus) of the synchronized estrous cycle (ovulation = d 0). Real-time PCR analysis of ECS mRNA expression revealed endocannabinoid receptor (CNR2), diacylglycerol lipase (DAGL), cyclooxygenase-2 (COX-2), fatty acid amide hydrolase (FAAH) and monoglyceride lipase (MGLL) had significant fold differences when comparing two different stages of the estrous cycle (late luteal phase vs. estrus). CNR2 and DAGL showed 2.01 and 2.57 fold increase, respectively (P=0.04 and P=0.02), in estrous cows. Among the analyzed genes FAAH (P=0.01) and MGLL (P=0.02) were significantly down-regulated in estrous cows, with a 5.01- and 2.44-fold difference in mRNA expression, respectively. Overall, this study highlights an association between the expression of the ECS in the bovine endometrium and stage of the estrous cycle.


2007 ◽  
Vol 52 (4) ◽  
pp. 1095-1105 ◽  
Author(s):  
Di Zhang ◽  
Anita Saraf ◽  
Teodozyi Kolasa ◽  
Pramila Bhatia ◽  
Guo Zhu Zheng ◽  
...  

2021 ◽  
pp. 019262332110104
Author(s):  
Marjolein van Heerden ◽  
Wendy Roosen ◽  
Sophie Lachau-Durand ◽  
Graham Bailey ◽  
Anthony Ndifor

Fetal examinations in embryo-fetal developmental (EFD) studies are based on macroscopic and dissecting microscopic evaluations, and histopathology is rarely performed other than to confirm macroscopic findings. Fetal lens examination is therefore generally limited to the presence, size, shape, and color of any abnormality. In a Sprague-Dawley rat EFD study with the fatty acid amide hydrolase (FAAH) inhibitor JNJ-42165279, an unusually high incidence of macroscopic granular foci was noted within the lens of gestation day 21 fetuses across all groups including controls, with higher incidence in the high-dose group. On histological evaluation of the lenses from fetuses with/without gross findings, primary lens fiber hypertrophy (swelling) and degeneration were observed across vehicle- and JNJ-42165279-exposed fetuses. In a follow-up study to investigate the progression or resolution of the fetal lens changes, animals exposed to suprapharmacological doses of JNJ-42165279 in utero had higher incidence of nuclear cataracts as detected via slit-lamp ophthalmic examinations on postnatal days 18 to 21 and 35 to 41. No histologic correlates for these cataracts were identified. We conclude that fetal primary lens fiber hypertrophy and nuclear cataracts at ophthalmology, are common background changes in this rat strain that are exacerbated by in utero exposure to the FAAH inhibitor JNJ-42165279.


2019 ◽  
Vol 85 (10) ◽  
pp. S376
Author(s):  
Esmaeil Mansouri ◽  
Rachel F. Tyndale ◽  
Christian S. Hendershot ◽  
Laura M. Best ◽  
Patricia Di Ciano ◽  
...  

2013 ◽  
Vol 33 (2) ◽  
pp. 215-223 ◽  
Author(s):  
Sébastien Lenglet ◽  
Aurélien Thomas ◽  
Oliver Soehnlein ◽  
Fabrizio Montecucco ◽  
Fabienne Burger ◽  
...  

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