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STUDIES ON HETEROSIS AND COMBINING ABILITY IN CERTAIN MALE STERILE LINES OF SUNFLOWER (Helianthus annuus L.) THROUGH LINE X TESTER ANALYSIS

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Title STUDIES ON HETEROSIS AND COMBINING ABILITY IN CERTAIN MALE STERILE LINES OF SUNFLOWER (Helianthus annuus L.) THROUGH LINE X TESTER ANALYSIS
 
Creator LAXMI KUMARI, D.S
 
Contributor ANANTHASAYANA, K
 
Subject STUDIES, HETEROSIS, COMBINING, ABILITY, CERTAIN, MALE, STERILE, LINES, SUNFLOWER, THROUGH, LINE X, TESTER, ANALYSIS
 
Description The present investigation was taken up using
six male sterile lines, viz., 7004 A, 7006 A, 7008 A,
8004 A, 9001 A and 9004 A and four restorer lines,
viz., 111 R, 87 R, 9-12 Rand 84 SR-1. These six male
sterile lines and four restorers were crossed in line x
tester design and the resulting twenty four hybrids
along with their ten parents and three checks, viz.,
APSH 11, KBSH 1 and MSFH 8 were yrown in a randomised
block design with three replications each. Data on ten
quantitative characters, viz., number of days to 50 per
cent flowering, plant height, number of leaves per
plant, stem diameter, capitulum diameter, number of
filled seeds per capitulum, number of unfilled seeds
per capitulum, 100 seed weight, oil per cent and yield
per plant were recorded to estimate heterosis,
combining ability, nature of gene action and interrelationship
between yield and yield components leading
to the identification of superior parents and crosses.
The hybrids manifested a high degree of
heterosis over the better parent and standard checks
for the ten characters studied. The hybrid 11xt3
recorded the maximum heterosis for yield per pian~
while 1 5xt3 recorded maximum 100 seed weight. The
XI
cross 1 6xt4 recorded the maximum oil per cent over
better parent and standard checks in combination with
good performance of yield per plant and 100 seed
weight. However, it exhibited neyative but not significant
heterosis over checks APSH-11 and MSFH-8 for 100
seed weight.
Among the parents 1 2 , 1 6 , t and t 4 possessed
significant gca effects for several c~aracters. Among
the hybrids 11xt3 and 1 6xt were found to be the best
specific combinations from ~he yield point of view.
The gene action was found to be predominantl¥
non-additive for all the characters studied. Thecssca
could be est~mated for all the characters studied
however, the ~ gca could be estimated for all the
characters except for capitulum diameter and oil per
cent.
Association among yield components and yield
revealed highly significant positive correlation between
yield and its components like plant height, capitulum
diameter, number of filled seeds per capitulum,
100 seed weight and oil per cent.
Path coefficient analysis revealed that number
of filled seeds per capitulum followed by capitulum
diameter had high direct effect on yield.
 
Date 2016-08-20T14:17:31Z
2016-08-20T14:17:31Z
1990
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/73190
 
Language en
 
Relation D3468;
 
Format application/pdf
 
Publisher ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY, RAJENDRANAGAR, HYDERABAD.