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Pigeonpea B i b l i o g r a p h y
The chromosomes and t h e i r b a h a v i o r in
Cajanus (2n - 22) a r e d e s c r i b e d . Somatic
p a i r i n g i s f o u n d . Prochromosomes showing
a n u m e r i c a l correspondence to t h e chromosomes
are formed i n the r e s t i n g n u c l e u s ,
and i t i s concluded t h a t they r e p r e s e n t t h e
s p i n d l e attachment r e g i o n s o f t h e
chromosomes.
PANDE, V . N . 1966.
C y t o l o g i c a l s t u d i e s in Cajanus and Atylosia.
D I l T (1966) T h e s i s . I n d i a n I n s t i t u t e
of Technology, Kharagpur, West B e n g a l ,
I n d i a . 565
PHIRKE, T . S . 1966.
Some s t u d i e s on p o l y p l o i d s in t u r (Cajanus
c a j a n ( L . ) M i l l s p . ) w i t h s p e c i a l r e f e r e n c e
t o t h e i r u t i l i z a t i o n i n b r e e d i n g . Nagpur
A g r i c . C o l l . Mag. (Spec. Res. N o . ) :
1 0 1 . 569
Seeds of v a r i e t i e s EB-3 and EB-38 were
t r e a t e d w i t h HNO 3 , H C l , and c h l o r a l hydrate.
Progenies showing gigas c h a r a c t e r s were
s t u d i e d and a l l showed 2n = 22 chromosomes.
Some were s i g n i f i c a n t l y d i f f e r e n t i n
h e i g h t , pod s i z e , y i e l d , and g r a i n w e i g h t ,
and were crossed s u c c e s s f u l l y w i t h normal
t y p e s .
PANKAJA REDDY, R., and N. GANGA PRASADA RAO.
1975.
Somatic v a r i a t i o n in Cajanus cajan.
C u r r . S c i . 44(22) : 8 1 6 - 8 1 7 . 566
The o u t c r o s s i n g i n t h i s s p e c i e s i s e s t i m a ­
t e d a t l e s s t h a n 10%. Off types i n t r u e -
b r e e d i n g v a r i e t i e s f r e q u e n t l y range from 1 0
to 30%. Experiments were t h e r e f o r e
c a r r i e d o u t o n t r u e - b r e e d i n g v a r i e t i e s
i n w h i c h s e v e r a l p l a n t c h a r a c t e r i s t i c s
were observed o n i n d i v i d u a l p l a n t s a s w e l l
as on each shoot on each p l a n t . Most
v a r i a t i o n s observed appear to be s o m a t i c ,
a l t h o u g h f u r t h e r s t u d i e s are r e q u i r e d .
PATHAK, G.N. 1948.
C y t o l o g i c a l s t u d i e s of a spontaneously
o r i g i n a t e d t e t r a p l o i d Cajanus cajan M i l l s p .
I n d i a n J . Genet. P 1 . B r e e d . 8 : 6 8 - 7 1 . 567
A n a t u r a l l y o c c u r r i n g t e t r a p l o i d (n = 22)
o f C . c a j a n i s d e s c r i b e d . I t s c y t o l o g i c a l
b e h a v i o r i n t h e p o l l e n mother c e l l s was
c h a r a c t e r i z e d by t h e f o r m a t i o n of 0 to 11
q u a d r i v a l e n t s and i r r e g u l a r d i s t r i b u t i o n
of t h e chromosomes at anaphase I and I I ;
t h e p o l l e n g r a i n s showed up to 80% s t e r i l i t y .
PATHAK, G . N . , and R.S. YADAVA. 1 9 5 1 .
Spontaneously o r i g i n a t e d h e x a p l o i d and
t e t r a p l o i d p l a n t s i n Cajanus oajan M i l l s p .
C u r r . S c i . 2 0 : 3 0 4 . 568
N a t u r a l l y o c c u r r i n g t e t r a p l o i d s (n=22) and
h e x a p l o i d s (n = 33) have been o b s e r v e d .
The h e x a p l o i d s s e t no seed. Out of t h e
n i n e t e t r a p l o i d s , f i v e produced some seed.
I t i s suggested t h a t chromosome d o u b l i n g
may have o c c u r r e d in d i p l o i d s and some
n a t u r a l t r i p l o i d s , p o s s i b l y a s t h e r e s u l t
o f c o l d c o n d i t i o n s d u r i n g a h a i l s t o r m .
REDDY, L . J . 1973.
I n t e r r e l a t i o n s h i p of Cajanus and Atylosia
species as r e v e a l e d by h y b r i d i z a t i o n and
pachytene a n a l y s i s . Ph.D. (1973) T h e s i s .
I n d i a n I n s t i t u t e o f Technology, K h a r a g p u r ,
West B e n g a l , I n d i a . 570
REDDY, L . J . , and D.N. DE. 1978.
Somatic c a r y o t y p e s of Cajanus c a j a n and
t h r e e species of Atylosia. Genetica ( I n
P r e s s ) . 571
The somatic chromosomes of Cajanus and of
Atylosia lineata, A. seriaea, and A. scarabaeoides
are s m a l l and come under t h e same
l e n g t h g r o u p s . Cajanus possesses t h r e e
m e t a c e n t r i c chromosomes as a g a i n s t f o u r
in a l l the Atylosia s p e c i e s . A. seriaea
possesses two s a t e l l i t e d chromosome p a i r s
i n c o n t r a s t t o one s a t e l l i t e d chromosome
p a i r in Cajanua and t h e o t h e r two Atylosia
s p e c i e s . D e t a i l e d a n a l y s i s showed t h a t
f i v e p a i r s of chromosomes a r e common to
a l l the species o f b o t h the g e n e r a .
B e s i d e s , Cajanus and A. lineata possess
seven i d e n t i c a l chromosome p a i r s and Cajanus
and A. seriaea and Cajanus and
A . scarabaeoides e x h i b i t s i x p a i r s o f
i d e n t i c a l chromosomes each. Thus on t h e
b a s i s o f somatic k a r y o l o g y , o f t h e t h r e e
species of Atylosia s t u d i e d , A. lineata
is c l o s e s t to Cajanus.
ROY, ASHOK. 1964.
I n t e r g e n e r i c h y b r i d i z a t i o n of Cajanus and
Atylosia. D1IT (1964) T h e s i s . I n d i a n
I n s t i t u t e o f Technology, Kharagpur, West
B e n g a l , I n d i a . 572
ROY, ASHOK, and D.N. DE. 1965.
I n t e r g e n e r i c h y b r i d i z a t i o n of Cajanus and
Atylosia. S c i . C u l t . 3 1 : 9 3 - 9 5 . 573
The e x i s t e n c e of a c l o s e r e l a t i o n s h i p b e t ­
ween t h e two genera is i n d i c a t e d by t h e
s i m i l a r i t y in chromosome number (2n ■ 2 2 ) ,
78