Ovulation rate (OR) and litter size (LS) were recorded in 72 ewes from a traditional sheep population native to Belle-Ile en Mer, France (BI) from 1986 to 1996. Mean, range and repeatability of OR were: 2.54 +/- 1.1 (n = 494), 1-8 and 0.8, respectively, whereas, for LS, they were: 2.23 +/- 1.0 (n = 146), 1-7 and 0.2, respectively. OR is significantly influenced by age, number of OR, maximum OR ...

Selecting parents and evaluating progenies is a very important step in breeding programs and involves approaches such as understanding the initial stages of growth and characterizing the variability among genotypes for different parameters, such as physiological, growth, biomass partitioning and nutrient translocation to the aerial part. In these cases, facilitating tools can be used to underst...

A reciprocal chromosomal transposition was identified in several annual oilseed Brassica napus genotypes used as parents in crosses to biennial genotypes for genetic mapping studies. The transposition involved an exchange of interstitial homeologous regions on linkage groups N7 and N16, and its detection was made possible by the use of segregating populations of doubled haploid lines and codomi...

The Chinese cherry (Prunus pseudocerasus/Cerasus pseudocerasus), which is native to China, an economically important tetraploid fruiting species. Its industry has been greatly limited due some general disadvantages in the fruits such as small fruit size, high acid content, and short shelf-life. As such, it urgent carry out cross breeding genetic improvement of this Here, seven combinations were...

The objective of this study was to estimate genetic parameters and to investigate the type of gene action in controlling androgenesis in wheat. Two wheat cultivars of Grebe and Houtman were reciprocally crossed with two synthetic genotypes of Do1 and Pol and then a complete set of the parents, F1, reciprocal F1 (RF1), F2 and back-cross generations (BC1 and BC2) of each cross were used for anthe...