F2 populations

Spotted wilt, caused by tomato spotted wilt virus (TSWV), has been one of major diseases in cultivated peanut grown in the southeastern United States (US) since 1990. Previously a major quantitative trait locus (QTL) controlling spotted wilt disease resistance was mapped to an interval of 2.55 cM genetic distance corresponding to a physical distance of 14.4 Mb on chromosome A01 of peanut by using a segregating F2 population.

12p vinarcissa 21-03-2023 1 1   Download

High-resolution mapping of the loci (QTN) responsible for genetic variation in quantitative traits is essential for positional cloning of candidate genes, and for effective marker assisted selection. The confidence interval (QTL) flanking the point estimate of QTN-location is proportional to the number of individuals in the mapping population carrying chromosomes recombinant in the given interval.

16p vinarcissa 21-03-2023 2 1   Download

The objective of research "Identification of SNP markers linked to Rf locus in carrot using GBS" was to identify SNP markers linked to Rf locus and develop a genetic map of Rf gene in carrot. For this purpose, a carrot F2 population segregating for male sterility was produced and segregating 10,425 SNP markers were discovered by using genotyping by sequencing (GBS).

15p lyhuyenthu 31-01-2023 7 1   Download

Feed efficiency and growth rate have been targets for selection to improve chicken production. The incorporation of genomic tools may help to accelerate selection. We genotyped 529 individuals using a high-density SNP chip (600 K, Affymetrix®) to estimate genomic heritability of performance traits and to identify genomic regions and their positional candidate genes associated with performance traits in a Brazilian F2 Chicken Resource population.

14p vihagrid 30-01-2023 5 4   Download

The six populations (parents, F1, backcrosses and F2) of the two wheat crosses, Gemmeiza 9 · IL1 (C1) and Sids 1 · IL2 (C2) were grown under normal irrigation (N) and drought stress (D) at the farm of Faculty of Agriculture, Sohag University, Egypt to study the genetic background of drought stress tolerance. Genetic variation was found for No.

8p schindler 30-12-2021 12 0   Download

It is well known that development of prostate cancer (PC) can be attributed to somatic mutations of the genome, acquired within proto-oncogenes or tumor-suppressor genes. What is less well understood is how germline variation contributes to disease aggressiveness in PC patients. To map germline modifiers of aggressive neuroendocrine PC, we generated a genetically diverse F2 intercross population using the transgenic TRAMP mouse model and the wild-derived WSB/EiJ (WSB) strain.

16p vibeauty 23-10-2021 6 0   Download

Quantitative trait loci (QTL) mapping provides a powerful tool to unravel the genetic bases of cotton yield and its components, as well as their heterosis. In the present study, the genetic basis underlying inbreeding depression and heterosis for yield and yield components of upland cotton was investigated in recombinant inbred line (RIL), immortalized F2 (IF2), and two backcross (BCF1) populations based on a high-density SNP linkage map across four environments.

16p viseulgi2711 31-08-2021 11 1   Download

The general combining ability (GCA) of parents in hybrid rice affects not only heterotic level of grain yield and other important agronomic traits, but also performance of grain quality traits of F2 bulk population which is the commodity consumed by humans.

16p vijeeni2711 24-07-2021 10 0   Download

A study of correlation and path analysis was undertaken in two F2 populations of Tomato in two promising hybrids Arka Samrat and Arka Rakshak for fruit yield and its component traits. This study helps in identifying the characters which mainly contributing to yield per plant.

10p cothumenhmong9 18-01-2021 12 2   Download

The present study from the cross (FL × Fl) an attempt was made to understand the variation for number of fibres per unit area in segregating F2 population besides genetics of fibre elongation.

5p cothumenhmong9 18-01-2021 8 2   Download

This purpose donors can be identified from available gene pool. The identification of donor parents for important characters through assessment of genetic variation in the available germplasm is required to devise a successful breeding programme.

13p gaocaolon9 22-12-2020 9 2   Download

The success of most crop improvement programs depends on variability and heritability of desirable traits. An investigation was carried out during kharif 2016 at Botanical garden, University of Agricultural Sciences, Dharwad, India to assess the extent of variability generated by hybridization and to estimate the heritability and genetic advance as percent of mean for seed cotton yield and its component traits in F2 generation of cross QTP 16 × ASa 151. The segregating population thus obtained was evaluated for eight quantitative traits.

6p caygaocaolon8 07-11-2020 15 2   Download

An investigation was carried out to assess the character association in forty germplasm and two F2 population for biometrical and nutritional traits in barnyard millet during Rabi, 2014 and Rabi, 2015 respectively.

7p angicungduoc8 07-11-2020 12 1   Download

The aim of this study was to determine selection gain and selection intensity for high yield i.e. to estimate the genetic potential transferred from F2 generation to F3 generation by using a total of 200 progenies were studied in F3 generation during kharif, 2014.

9p nguathienthan8 20-10-2020 12 2   Download

Dominant markers in an F2 population or a hybrid population have much less linkage information in repulsion phase than in coupling phase. Linkage analysis produces two separate complementary marker linkage maps that have little use in disease association analysis and breeding.

12p viflorida2711 30-10-2020 11 2   Download

An experiment was conducted on genetic variability, heritability and genetic advance in wheat population including 48 F1’s + 48 F2’s + 16 parents in RBD during Rabi 2014-15. Analysis of variance for the design of experiments revealed that mean squares due to treatments were highly significant for all the ten characters studied, while mean squares due to replications were non-significant in both F1 and F2 generations.

5p chauchaungayxua8 03-10-2020 17 2   Download

Earliness, an adaptive trait and factor of variation for agronomic characters, is a major trait in plant breeding. In present investigation, the experimental material comprised of P1, P2, F1, F2 and F2:3 generations of wheat crossDL-788-2 X GW-322 for earliness related traits with objective of linkage and QTL mapping in bread wheat. Out of 200 SSR markers screened for parental polymorphism for earliness related traits, only 11% of SSR markers showed good polymorphism between two parental lines.

11p trinhthamhodang1215 23-09-2020 9 1   Download

The success of most crop improvement programs depends upon the genetic variability and heritability of desirable traits. The genetic variability and heritability study was carried out in F2 population of Suvin X BCS 23-18-7 cross, at College of Agriculture, UAS Darwad during Kharif 2016-17.

9p trinhthamhodang1215 23-09-2020 17 2   Download

Studies on the phenotypic and genotypic correlation of the yield components and their contribution to yield through path analysis provide information to design appropriate breeding strategy towards improvement of the crop.

5p caygaocaolon7 18-09-2020 19 1   Download

The excellent grain quality of IR64 has become the standard for rice quality requirements in a number of countries. Because of its popularity with farmers, IR64 has been used widely as a parent in rice breeding, as a recipient of new genes through marker-assisted backcrossing and genetic transformation and as a standard check for basic studies by many rice researchers.

12p caygaocaolon7 18-09-2020 15 1   Download