Thumbnail Image

Theses

Browse

20191
Reset filters
Subject: Genetics and Plant Breeding × Author: Choudhary, Raju Ram × End date: 2019 × Start date: 2019 × Type: Thesis ×
Reset filters

Search Results

Now showing 1 - 1 of 1
  • Thumbnail Image
    ThesisItemOpen Access
    Heterosis studies based upon Mori CMS system in Brassica juncea (L.)
    (CCSHAU, 2019) Choudhary, Raju Ram; Sheoran, R.K.
    Line x tester analysis was carried out to estimate heterosis and combining ability effects of 50 hybrids developed by crossing 10 Mori CMS lines with five restorer testers of Brassica juncea (L.). The F1 hybrids along with parental genotypes planted at Oilseeds Research Area, Department of Genetics & Plant Breeding, CCS Haryana Agricultural University, Hisar India during 2018-19 were evaluated for twelve characters, including days to 50 % flowering, days to maturity, plant height (cm), number of primary branches per plant, number of secondary branches per plant, main shoot length (cm), number of siliquae on main shoot, siliqua length (cm), number of seeds per siliqua, 1000-seed weight (g), oil content (%) and seed yield per plant (g). Analysis of variance revealed sufficient genetic variability among lines, testers crosses and line x tester for most of the traits. Presence of both additive and non-additive gene actions with preponderance of non-additive gene action in controlling yield and most of component traits so hybrid breeding would be the most appropriate breeding methodology. Four lines, namely, MA-8812, MA-9301, MA-8701 and MA-023 and one tester, MR-38 were found the good general combiners possessing highly significant positive GCA effects for seed yield per plant and component traits. Crosses MA-9301 x MR-44 and MA-9705 x MR-31 were showed significant SCA effects for seed yield per plant in desirable direction. Only two crosses namely MA-9301 x MR-44 and MA-8701 x MR-38 showed significant economic heterosis over standard check DMH-1. These crosses may be considered as most promising for further exploitation in breeding programmes and the parents involved may be converted to well adapted cytoplasmic male sterile or restorer lines.