Research Article

Related GMR Articles

12/01/2009
Cercospora zeae-maydis; Combining ability; Exserohilum turcicum; Gray leaf spot; Northern leaf blight; Zea mays L.

We estimated general and specific combining abilities and examined resistance to northern leaf blight (Exserohilum turcicum) and to gray leaf spot (Cercospora zeae-maydis) in a set of nine inbred popcorn lines. These inbreds were crossed in a complete diallel scheme without reciprocals, which produced 36 F1 hybrids. Two experiments with a square lattice design ... more

R.A. Vieira; C.A. Scapim; L.M. Moterle; D.J. Tessmann; T.V. Conrado; A.T.Amaral Júnior
11/02/2008
Combining ability; Heterotic group; Heterotic grouping methods; Simple sequence repeat markers; Tropical heterotic maize; Zea mays L.

The objectives of the present study were to determine heterotic groups of germplasm lines of tropical maize by test crosses and by simple sequence repeat (SSR) markers and to compare five grouping methods of heterogeneous maize. Sixteen lines of nine populations in the S5 generation were evaluated in test crosses with three testers. The results of four experimental trials over two ... more

C.G. Aguiar; I. Schuster; A.T.Amaral Júnior; C.A. Scapim; E.S.N. Vieira
10/07/2008
Combining ability; diallel analysis; Heterosis; Zea mays L.

With the aim of estimating genetic parameters and identifying superior popcorn combinations, 10 parents were crossed in a circulant diallel and evaluated together with the 15 resulting hybrids at two locations in two growing seasons for grain yield, number of broken plants, number of partially husked ears and popping expansion. The hybrids were less sensitive to environmental variations than ... more

R.M. Rangel; A.T.Amaral Júnior; C.A. Scapim; S.P.Freitas Júnior; M.G. Pereira
08/23/2011
Combining ability; Heterosis; Line x tester analysis; Salinity; Seedlings; Tomato

We attempted to find the suitable parents for the development of tomato hybrids for high salt soils by exploiting combining ability, gene action and heterosis. Six salt-tolerant and three salt-intolerant genotypes, along with their 18 F1 crosses, were evaluated at seedling stage under 10 and 15 dS/m (NaCl) salinity stress, compared to the control level of salinity. The experiment was laid ... more

A. Saeed; M.Q. Shahid; S.A. Anjum; A.A. Khan; A. Shakeel; M.F. Saleem; N. Saeed
12/13/2013
Combining ability; Elsinoe ampelina; Heritability; Scab; Vitis spp

Downy mildew (Plasmopara viticola) and anthracnose (Sphaceloma ampelinum) are two of the major diseases of most grapevine (Vitis vinifera L.) cultivars grown in Thailand. Therefore, breeding grapevines for improved downy mildew and anthracnose resistance is crucial. Factorial crosses were made between three downy mildew and/or anthracnose resistant lines ('NY88. ... more

O. Poolsawat; S. Mahanil; P. Laosuwan; S. Wongkaew; A. Tharapreuksapong; B.I. Reisch; P.A. Tantasawat
07/02/2014
Carica papaya; Combining ability; Diallel cross; Quantitative genetics

Diallel crossing methods provide information regarding the performance of genitors between themselves and their hybrid combinations. However, with a large number of parents, the number of hybrid combinations that can be obtained and evaluated become limited. One option regarding the number of parents involved is the adoption of circulant diallels. However, information is lacking regarding ... more

M. Vivas; S.F. Silveira; A.P. Viana; A.T. Amaral; D.L. Cardoso; M.G. Pereira
10/05/2007
Combining ability; Endogamy; Inbred lines; Microsporogenesis; Popcorn

Endogamy places genes for several characteristics in homozygosis, which include those related to meiosis causing abnormalities that may impair gamete viability. An original population (S0) of popcorn (CMS-43) produced by Embrapa Maize and Sorghum was self-pollinated for seven years, generating inbred lines (S1 to S7). Conventional studies of microsporogenesis revealed ... more

G.C.L. Ricci; N. Silva; M.S. Pagliarini; C.A. Scapim
10/24/2016
Combining ability; Line x tester; SSR; Water stress tolerance

Sunflower cannot produce high yields under water-limiting conditions. The aim of the present study was to prevent the impediments on yield and to develop varieties with high-yield potential under water scarce conditions. For achieving this objective, it is necessary to detect parents with desirable traits that mainly depend on the action of genes controlling the ... more

M. Saba; F.A. Khan; H.A. Sadaqat; I.A. Rana
08/14/2019
Capsicum annuum; Combining ability; Ideotype; Reciprocal effect

The commerce of potted ornamental plants has grown in Brazil, and ornamental pepper stands out due to a profusion of colors and forms, as well as due to its easy cultivation. However, few studies have been carried out with ornamental pepper for genetic improvement of fruit production, plant size and precocity. Thus, in order to conduct a genetic improvement program ... more

R.A.G. Marcelino; A.S. Albuquerque
07/04/2014
Chicken; Egg production; Growth hormone gene; Ligase detection reaction; Polymorphism

Growth hormone (GH) has diverse functions in animals, together with other hormones from the somatotropic axis. Here, chicken GH (cGH) was investigated in recessive white chickens and Qingyuan partridge chickens as a candidate gene affecting egg production traits. Chicken egg production traits were studied in association with 4 selected single nucleotide polymorphisms (T185G, G662A, ... more

Y.J. Su; J.T. Shu; M. Zhang; X.Y. Zhang; Y.J. Shan; G.H. Li; J.M. Yin; W.T. Song; H.F. Li; G.P. Zhao

Pages