TITLE

SELECTION CRITERIA IN M3 and M4 POPULATIONS OF SESAME (SESAMUM INDICUM L.)

AUTHOR(S)
Sarwar, G.; Hussain, Jafar
PUB. DATE
March 2010
SOURCE
Journal of Agricultural Research (03681157);Mar2010, Vol. 48 Issue 1, p39
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A study was conducted at Nuclear Institute for Agriculture and Biology, Faisalabad, Pakistan during 2006-07 to raise M1 and then M2 segregating generation for selection of desirable variants. For this purpose two local highly adapted cultivars of sesame viz. Til-89 and TS-3 were irradiated with four doses of gamma rays viz. 100,200,400 and 600 grey. From M2 selected plants, 45 M3 and M4 lines of sesame were evaluated. At maturity, data on morphological traits like plant height, number of branches per plant, capsule length, seeds per capsule, capsule number, 100 seed weight, biomass yield, harvest index and seed yield per plant were recorded. Correlation coefficient and path analysis of these traits were worked out to assess the importance and significance of different traits. During 2006 positive and highly significant phenotypic and genotypic correlation of seed yield was observed with branches per plant, capsule per plant, biomass yield and harvest index. Branches per plant, biomass yield and harvest index showed positive direct effect alongwith positive and significant genotypic correlation. Capsule number showed negative direct effect but highly significant genotypic correlation. Highest positive indirect effect of biomass was observed via capsules per plant and branches per plant. During 2007, plant height, branches per plant, capsule per plant, biomass per plant and harvest index showed positive and significant correlation with seed yield. Capsule per plant, biomass per plant and harvest index showed high positive direct effects combined with positive genotypic correlation with seed yield. It was determined that these characters should be given more preference and these may be selected directly to improve seed yield. The study concludes that improvement in seed yield could be possible if selection is based primarily on more number of branches, higher biomass yield, high harvest index and more number of capsules per plant.
ACCESSION #
57232583

 

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