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M i c r o b i o l o g y
The i n t e r v a r i e t a l h y b r i d s i n red gram
between Co-1 ( a s h o r t - t e r m , h i g h - y i e l d i n g
s t r a i n ) and 1 9 g e n e t i c a l l y d i v e r s e v a r i e ­
t i e s expressed h e t e r o s i s f o r p l a n t h e i g h t ,
p l a n t s p r e a d , number of b r a n c h e s , number of
c l u s t e r s , number of pods, and days to 50%
f l o w e r i n g . Five h y b r i d s expressed maximum
h e t e r o s i s f o r t h e c h a r a c t e r s s t u d i e d . The
h y b r i d Co-1 x 8 0 , which was o u t s t a n d i n g l y
s u p e r i o r to the o t h e r s , showed a mean
percentage i n c r e a s e of 179.6 and 188.5
i n two i m p o r t a n t economic a t t r i b u t e s ,
number of c l u s t e r s and number of pods,
r e s p e c t i v e l y , over t h e s u p e r i o r p a r e n t .
VEERASWAMY, R., R. RATHNASWAMY, and
M. MURUGESAN. 1975.
Path a n a l y s i s in red gram (Cajanus cajan
( L . ) M i l l s p . ) . Madras A g r i c . J . 6 2 ( 3 ) :
166-168. 818
It is shown f rom data on 21 d i v e r s e genotypes
t h a t ( i ) h e i g h t had a low p o s i t i v e
d i r e c t e f f e c t o n y i e l d b u t a h i g h p o s i t i v e
i n d i r e c t e f f e c t through branch number, and
a h i g h n e g a t i v e i n d i r e c t e f f e c t t h r o u g h
days t o f i r s t f l o w e r i n g ; ( i i ) branch number
had a h i g h p o s i t i v e d i r e c t e f f e c t o n y i e l d ;
( i i i ) c l u s t e r number per p l a n t and pod
number had a p o s i t i v e i n d i r e c t e f f e c t
through branch number; and ( i v ) days to
f i r s t f l o w e r i n g had a moderate n e g a t i v e
d i r e c t e f f e c t and a h i g h i n d i r e c t e f f e c t
through branch number. I t I s concluded
t h a t branch number had t h e g r e a t e s t
i n f l u e n c e o n y i e l d .
VEERASWAMY, R., R. RATHNASWAMY, A. RAGHUPATHY,
and G.A. PALANISWAMY. 1973.
Genotypic and phenotypic c o r r e l a t i o n s i n
Cajanus aajan ( L . ) M i l l s p . Madras A g r i c .
J . ( 9 - 1 2 ) : 1 8 2 3 - 1 8 2 5 . 819
A c l o s e a s s o c i a t i o n was found to e x i s t
between number of c l u s t e r s and number of
pods per p l a n t on p h e n o t y p i c b a s i s b u t t h i s
a s s o c i a t i o n was reduced on the g e n o t y p i c
l e v e l by e n v i r o n m e n t a l f a c t o r s . These two
c h a r a c t e r s were a l s o found the most r e l i a ­
b l e i n d e x o f s e l e c t i o n f o r y i e l d . The
h i g h e s t c o h e r i t a b i l i t y e s t i m a t e (99.13)
was f o r number of branches and pods per
p l a n t . However, p l a n t h e i g h t and number of
days to f l o w e r are a l s o u s e f u l as phenotyp
i c i n d i c e s f o r s e l e c t i o n .
VENKATESWARLU, S . , R.M. SINGH, and
R.B. SINGH. 1976.
EMS-induced m u l t i c a r p e l l a t e c o n d i t i o n i n
Cajanus c a j a n . C u r r . S c i . 4 5 ( 2 ) :
773-774. 820
A l l t h e t h r e e types o f f l o w e r s (mono-, b l ­
and t r i - c a r p e l l a r y ) are found on the same
p l a n t w i t h concomitant i n c r e a s e i n the
stamens and complete p o l l e n and o v u l e
s t e r i l i t y .
WAKANKAR, S . M . , and L . N . YADAV, 1975.
Path a n a l y s i s o f y i e l d components i n arhar
(Cajanus c a j a n ) . I n d i a n J . A g r i c . Res.
9 ( 4 ) : 1 8 2 - 1 8 6 . 821
C o r r e l a t i o n s and path c o e f f i c i e n t s were
e s t i m a t e d w i t h regard to 14 c h a r a c t e r s in
an F 2 p o p u l a t i o n of a cross of v a r .
G w a l l o r - 3 x NP-69. Results showed t h a t
more pods, secondary branches per p l a n t
w i t h h i g h seed i n d i c e s , and l i m i t e d
s p r e a d i n g are r e l i a b l e s e l e c t i o n c r i t e r i a .
M I C R O B I O L O G Y
ARORA, NIRMAL. 1956.
M o r p h o l o g i c a l study of the r o o t nodules on
Cajanus indicus. P r o c . I n d i a n S c i . Cong.
43(3) :244-245. ( A b s t r a c t ) . 822
L a r g e , more or l e s s e l o n g a t e d nodules are
s p a r s e l y d i s t r i b u t e d on the r o o t system of
C. aajan. I n f e c t i o n of the r o o t s occurs
through r o o t h a i r s . A mature nodule shows
a w e l l marked b a c t e r o i d a r e a , a p i c a l
m e r i s t e m , and v a s c u l a r zone. Two v a s c u l a r
stands a r i s i n g near the r o o t p r o t o x y l e m
supply the n o d u l e . The v a s c u l a r bundles
may b e c o l l a t e r a l , i n v e r s e l y c o l l a t e r a l o r
b i c o l l a t e r a l . I n l a t e r stages they show
the development of secondary e l e m e n t s . The
r h i z o b i a s t i m u l a t e t h e c o r t i c a l c e l l s t o
d i v i d e . The nodule i s exogenous i n o r i g i n .
The r o o t nodules of C. indiaus d i f f e r from
the e a r l i e r d e s c r i b e d herbaceous nodules
( A l l e n and A l l e n , 1954) i n h a v i n g a s c l e -
r e i d l a y e r i n the c o r t e x , i n a d i f f u s e
method o f t i s s u e d e g e n e r a t i o n , and i n the
f a c t t h a t t h e o r i e n t a t i o n o f xylem and
phloem i s n o t c o n s t a n t .
BHAGYARAJ, J . , and G. RANGASWAMI. 1966.
O n the v a r i a t i o n s i n r h i z o s p h e r e e f f e c t s o f
some crop p l a n t s . C u r r . S c i . 3 5 ( 9 ) :
238-239. 823
Amongst f i v e crops grown i n s i m i l a r c o n d i ­
t i o n s , pigeonpea had t h e g r e a t e s t r h i z o ­
sphere e f f e c t o n b a c t e r i a .
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