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Pigeonpea
B i b l i o g r a p h y
T e t r a p l o i d o b t a i n e d from t h e seed of a
c o l c h i c i n e - i n d u c e d 4 n p l a n t had s i g n i f i c a n t ­
ly fewer branches and nodes on t h e main
stem than t h e d i p l o i d c o n t r o l s . The 4n
and 2 n p l a n t s showed o n l y s l i g h t d i f f e r e n ­
ces i n l e a f and l e a f l e t measurements and i n
l e a f number. The t e t r a p l o i d s were i n
g e n e r a l more v a r i a b l e i n growth r a t e and
i n o t h e r c h a r a c t e r s s t u d i e d than the
d i p l o i d s . M u l t i v a l e n t f o r m a t i o n and
i r r e g u l a r i t y i n d i s j u n c t i o n i n t h e 4 n
p l a n t s r e s u l t e d i n 62.4 + 11.01% o f
a b o r t i v e p o l l e n g r a i n s . The average
s i z e s o f t h e f e r t i l e p o l l e n g r a i n o f 2 n
and 4n p l a n t s were 47.17µ and 50.34 µ ,
r e s p e c t i v e l y .
BHATTACHARYYA, SUNILKUMAR. 1976.
C y t o g e n e t i c s o f I n d i a n p u l s e s . P h . D .
(1976) T h e s i s . U n i v e r s i t y o f C a l c u t t a ,
C a l c u t t a , West B e n g a l , I n d i a . 549
DAFE, G.A. 1966.
Some s t u d i e s in C 2 g e n e r a t i o n of a u t o t e t r a -
p l o i d s pigeonpea (Cajanus c a j a n ( L . )
M i l l s p . ) . Nagpur A g r i c . C o l l . Mag. ( S p e c
Res. N o . ) , p. 107. 550
Induced p o l y p l o i d s - t e t r a p l o i d s (n - 22)
were s t u d i e d and v a r y i n g degrees of
s t e r i l i t y o b s e r v e d . They were u s u a l l y
l a t e r i n m a t u r i t y , s h o r t e r i n h e i g h t , more
e r e c t , and had l o n g e r and t h i c k e r l e a v e s ,
more b r a n c h e s , and t h i c k e r stems. Flower
p a r t s were a l s o l a r g e r . Seeds c o n t a i n e d
more n i t r o g e n than t h e i r p a r e n t s . Wide
v a r i a t i o n i n f e r t i l i t y was o b s e r v e d .
DARLINGTON, C . D . , and A . P . WYLIE (EDITORS).
1955.
Chromosome a t l a s o f f l o w e r i n g p l a n t s .
A l l e n and Unwin: London. 551
DATTA, P . C . , and N. SAHA. 1972.
A few t r i a l s o f h y b r i d i z a t i o n i n Euphaseol
e a e and Cajaneae. Castanea 3 7 ( 4 ) :
294-297. 552
D'CRUZ, R., and A . S . JADAV. 1972.
A n e u p l o i d y i n t u r (Cajanus c a j a n L .
M i l l s p . ) . Mahatma Phule A g r i c . U n i v . Res.
J . 3 ( 1 ) : 6 1 - 6 2 . 553
A t a l l p l a n t w i t h l a r g e r l e a v e s and
f l o w e r s than normal was found w i t h 2x = 22
and these formed 11 l l at metaphase I. One
p l a n t w i t h 23 chromosomes appeared to have
e x t r a v i g o r o f p l a n t and seed.
DE, D . N . , and L . J . REDDY. 1972.
Homology between Cajanue and Atyloaia
genomes: O r i g i n of Cajanus. In: Advance
Notes of Symposium on Genome Concept -
E u k a r y o t a . 5 9 t h I n d i a n S c i . Cong. ( S e c t .
B o t . ) . p p . 1 0 - 1 1 . 554
The two genera Cajanus and Atyloaia a r e
s e p a r a t e d o n l y on t h e b a s i s of presence or
absence of s t r o p h i o l e . The chromosome
number of Cajanus is 2n ■ 2 2 , t h e same as
t h a t of A. lineata, A. seriaea, and
A. scarabaeoides. There is b r o a d s i m i l a r ­
i t y between t h e i r chromosomes. The
pachytene chromosomes of a Cajanus x
A. lineata h y b r i d e x h i b i t complete p a i r i n g
of a l l t h e chromosomes except a few t e r m i ­
n a l and i n t e r s t i t i a l regimes o f homologues.
Pachytene k a r y o l o g y i n d i c a t e d t h a t Atylosia
lineata is c l o s e s t to Cajanus aajan.
Cajanus is a monotypic genus and it moved
from I n d i a t o o t h e r p a r t s o f t h e w o r l d .
The g r e a t e s t d i f f e r e n t i a t i o n and g r e a t e s t
abundance of b o t h Cajanus and Atylosia are
found in the Western Ghats and t h e Malabar
c o a s t . The c o n c l u s i o n was drawn t h a t t h e
b r o a d - l e a f evergreen f o r e s t area on the
Western coast o f I n d i a i s t h e c e n t e r o f
o r i g i n of Cajanus.
DE, D . N . , and L . J . REDDY. 1972.
C e n t r i c f u s i o n and s t a r f o r m a t i o n a t pachytene
of Cajanus-Atylosia h y b r i d s . In:
P r o c . Symposium on C y t o g e n e t i c s in t h e
E v o l u t i o n and Improvement of P l a n t s , O c t o ­
b e r , 1972. S r i n a g a r , Kashmir, I n d i a . 555
The c u l t i v a t e d crop Cajanus aajan ( T u r ,
A r h a r , Pigeonpea) has been s u c c e s s f u l l y
h y b r i d i z e d w i t h t h r e e species of Atylosia,
v i z . A. lineata, A. seriaea, and
A. scardbaeoides. The pachytene a n a l y s i s
i n d i c a t e d a h i g h degree of chromosomal
homology between t h e two g e n e r a . The
centromeres o f t h e b i v a l e n t s fuse t o g e t h e r
t o form a t y p i c a l s t a r - s h a p e d c o n f i g u r a t i o n
d u r i n g p a c h y t e n e , w h i c h v a r i e s from c e l l t o
c e l l i n d i f f e r e n t h y b r i d s . Such s t a r
f o r m a t i o n i s e x t r e m e l y r a r e i n t h e p a r e n t s .
The i m p l i c a t i o n s o f s t a r f o r m a t i o n a r e
d i s c u s s e d .
DEODIKAR, G . B . , and C.V. THAKAR. 1956.
Cyto-taxonomic evidence f o r t h e a f f i n i t y
between Cajanus i n d i c u s Spreng. and c e r t a i n
e r e c t species of Atylosia W. & A. P r o c .
I n d i a n Acad. S c i . ( S e c t . B ) . 4 3 : 3 7 - 4 5 . 556
M o r p h o l o g i c a l , taxonomic, and c y t o l o g i c a l
e v i d e n c e , homology o f normal w i t h mutant
c h a r a c t e r s , and t h e h i g h degree o f f e r t i ­
l i t y o f i n t e r g e n e r i c h y b r i d s i n d i c a t e a
c l o s e a f f i n i t y between C. i n d i c u s and
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