Research Article

Related GMR Articles

Beef cattle; Crossbreeding; Heterosis; performance

The aim of the present study was to evaluate the heterosis effects on weaning weight at 205 days (WW, n = 146,464), yearling weight at 390 days (YW, n = 69,315) and weight gain from weaning to yearling (WG, n = 59,307) in composite beef cattle. The fixed models were: RM, which included contemporary groups, class of age of dam, outcrossing percentages for direct and maternal effects, and ... more

G.B. Mourão; J.B.S. Ferraz; J.P. Eler; R.S. Bueno; J.C.C. Balieiro; E.C. Mattos; L.G.G. Figueiredo
Bamboo; Crossbreeding; Hybrid identification; ISSR; Suspected hybrid

Crossbreeding is an efficient means to increase production and quality in plants; however, hybridization is seldom reported in bamboo. We crossbred two bamboo species Phyllostachys kwangsiensis (female parent) and Phyllostachys bambusoides (male parent) for the first time, and obtained suspected bamboo hybrids. We identified two bamboo hybrids from the above parents ... more

X.C. Lin; Y.F. Lou; J. Liu; J.S. Peng; G.L. Liao; W. Fang
Dalbergia sissoo Roxb.; Genetic differentiation; Genetic diversity; RAPD

Dalbergia sissoo, a wind-dispersed tropical tree, is one of the most preferred timber tree species of South Asia. Genetic diversity and differentiation among natural populations of D. sissoo were examined for the first time. We found a relatively high level of genetic diversity in D. sissoo, both at the species level (percentage of polymorphic bands = 89.11%; H ... more

B.Y. Wang; L. Shi; Z.Y. Ruan; J. Deng
Genetic differentiation; Genetic diversity; ISSRs; Machilus thunbergii; Population

The genetic diversity of 10 Machilus thunbergii populations in eastern China was analyzed using inter-simple sequence repeat markers. The populations showed high genetic diversity, with an overall population genetic diversity of 0.2343. Genetic diversity varied largely among populations, and populations with the highest genetic diversity were mainly from the eastern and western ... more

J. Liu; H.G. Sun; J.M. Jiang; W.H. Shao; Q.F. Luan
Apis cerana; Genetic differentiation; Genetic diversity; mtDNA

DNA sequence diversity in the tRNAleu-COII portion of the mitochondrial genome was investigated in samples of Apis cerana from Yunnan, China. A fragment of about 480 bp in tRNAleu-COII, including a noncoding area and part of COII, was sequenced. The noncoding area was 97-98 bp; 8 haplotypes were found, among which 5 had been reported previously, while 3 ... more

L. Yin; T. Ji
Cyprinus carpio L.; Genetic differentiation; Microsatellite; mtDNA; Selection pressure

Selection pressures are the principle evolutionary forces for the genetic differentiation of populations. Recent changes in selection pressures on mitochondrial DNA and microsatellite have been described in a wide variety of organisms. The common carp (Cyprinus carpio) has experienced strong selection pressure, in particular artificial selection, during its domestication. However ... more

L.H. Xu; C.H. Wang; J. Wang; Z.J. Dong; Y.Q. Ma; X.X. Yang
Endangered plant; Genetic differentiation; Genetic diversity; Inter-simple sequence repeat; Sauvagesia rhodoleuca

Sauvagesia rhodoleuca (Ochnaceae) is an endangered plant that is endemic to southern China. The levels of genetic variation and patterns of population structure in S. rhodoleuca were investigated using inter-simple sequence repeat markers. Eleven primers were used to amplify DNA samples from 117 individuals, and a total of 92 loci were detected. Our results indicated ... more

S.F. Chai; Y.S. Jiang; X.Y. Zhuang; Y.C. Shi; X. Wei; W.H. Luo; Z.Y. Chen
Genetic differentiation; Genetic diversity; Hatchery population of Korean spotted sea bass (Lateolabrax maculatus); Microsatellite loci; Multiplex polymerase chain reaction (PCR) assay

The spotted sea bass, Lateolabrax maculatus, is an important commercial and recreational fishery resource in Korea. Aquacultural production of this species has increased because of recent resource declines, growing consumption, and ongoing government-operated stock release programs. Therefore, the genetic characterization of hatchery populations is necessary to maintain the ... more

H.S. An; H.Y. Kim; J.B. Kim; D.S. Chang; K.D. Park; J.W. Lee; J.I. Myeong; C.M. An
Genetic differentiation; Genetic diversity; Hatchery stock; Microsatellite; Ruditapes philippinarum; Wild population

Manila clam (Ruditapes philippinarum) is one of the major aquaculture species around the world and supports an important segment of the aquaculture industry in China. In this study, we used ten microsatellite markers to detect genetic diversity within six R. philippinarum populations and genetic differentiation between them. A total of 109 alleles were detected across ... more

K. Xing; M.L. Gao; H.J. Li
Apomixis; Apospory; Heterosis; Interspecific hybridization; Triploid

Apomixis means seed formation without fertilization. In cassava (Manihot esculenta) it is an alternative to reproduction by cuttings, which normally transmits pathogens and leads to an accumulation of viral and bacterial diseases. Apomixis also assures preservation of heterosis and avoids genetic segregation. It occurs in wild relatives of cassava and has been transferred ... more

N.M.A. Nassar