Early segregating generations
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Eight F3 populations and one check (JS 335) of soybean were evaluated at the experimental farm of Agricultural Botany Section, College of Agriculture Nagpur during Kharif 2018-19 using randomized block design with 3 replications. The objectives of the study were to investigate the correlations among seven characters of soybean which will be used for the selection of seed yield in early generations.
5p caygaocaolon11 21-04-2021 15 1 Download
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At the same time, the breeding lines from the advanced generations are also used as parental lines for developing commercially exploitable heterotic hybrids. But, most often the source of early generations i.e., F3, F4, F5 and F6 segregating populations offer wider opportunities for achieving high success, because of wider genetic base.
10p trinhthamhodang1218 26-02-2021 12 2 Download
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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
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Cultivated sugarcane (Saccharum spp. complex, 2n = 80-120) belongs to the genus Saccharum of the family Poaceae. Sugarcane (Saccharum spp. complex) is an important cash crop of the tropical and subtropical regions of the world for its distinct characteristic of high sugar concentration accumulated in the stalk. Genetic diversity gives species the ability to adapt to changing environments, including new pests and diseases and new climatic conditions.
9p trinhthamhodang1213 29-05-2020 9 0 Download
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In F3 population except seeds per siliqua and 100 seed weight the 15 crosses differed significantly for all the other nine characters, however in F4 population the 15 crosses differed significantly for all the characters. Pusa Bahar × Rajasthan local selection -1 (13.62) was the highest performer in F3 generation and in F4 Rajasthan local selection1 × Pusa Barani (12.53) was the highest yielder.
14p quenchua4 06-04-2020 17 1 Download
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The 1329 F2, 174 B1 and 191 B2 plants were evaluated along with parents (Suvin and BCS 23-18-7) and its F1 for seed cotton yield and its component traits and fibre quality traits. Top 20 transgressive segregants were selected for seed cotton yield from all three segregation generations (F2, B1 and B2), recorded 104.02 to 169.46 per cent higher seed cotton yield than best parent BCS 23-18-7 (116.90 g/plant). Six transgressive segregants recorded 5 per cent early flowering (< 65 days) with a minimum of 50 per cent yield advantage (> 177 g) over BCS 23-18-7.
12p trinhthamhodang4 22-03-2020 9 1 Download
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Correlation and presence of genetic interactions was studied using F2 and F3 generations in two cowpea crosses for yield and its component traits. Most of the characters studied were positively skewed and were being governed by several genes indicating quantitative inheritance. Variance, skewness and kurtosis have also indicated that homozygosity has increased from the generation to generation in cowpea crosses. Cross A (C-152 × V-16) was found better than crossB (C-152 × V-57817) in providing high yielding segregants displaying parental diversity.
7p trinhthamhodang4 22-03-2020 13 1 Download
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Results suggested that due to its maximum heritability, early selection would be feasible in cross Hashim-08 × LU-26, while due to low heritability and variation in cross Parula × Blue Silver, delayed selection will be effective. Yield improvement based on duration of grain filling could be done through selection in later generations until the accumulation of the maximum favorable additive genes is achieved.
13p danhdanh11 11-01-2019 12 1 Download