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C y t o g e n e t i c s
c e r t a i n e r e c t species o f Atylosia, p a r t i ­
c u l a r l y A. lineata and A, seriaea. A c c o r d ­
i n g to o b s e r v a t i o n s on chromosome m o r p h o l o ­
g y , A, seriaea is more c l o s e l y r e l a t e d to
C. aajan than A. lineata. S t r u c t u r a l
changes in t h e chromosomes may have played
a major r o l e i n t h e d i f f e r e n t i a t i o n o f two
g e n e r a . Atylosia s p p . may be u s e f u l as a
f o r a g e legume and a l s o i n b r e e d i n g v a r i e ­
t i e s of C, aajan combining h a r d i n e s s ,
p e r e n n i a l h a b i t , t o l e r a n c e t o d r o u g h t ,
and r e s i s t a n c e to p e s t s and d i s e a s e s .
A. lineata and A. seriaea have shown a
h i g h degree o f r e s i s t a n c e t o pod b o r e r
(Exelastis atomosa) and Fusarium udum.
Taxonomic i n c o r p o r a t i o n o f the e r e c t
species of Atylosia in Cajanus is
s u g g e s t e d .
JOSHI, K.S. 1966.
S t u d i e s o n the a u t o t e t r a p l o i d s o f t u r
(Cajanus aajan ( 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. Red. N o . ) ,
p . 1 1 1 . 557
The a u t o t e t r a p l o i d s were l a t e i n m a t u r i t y
and showed v a r y i n g l e v e l s o f s t e r i l i t y .
C o n s i d e r a b l e v a r i a t i o n i n f e r t i l i t y occurred
i n b o t h n a t u r a l and induced a u t o t e t r a p l o i d s .
The p o s s i b i l i t y o f i n c r e a s i n g t h e f e r t i l i t y
t h r o u g h a p p r o p r i a t e b r e e d i n g methods such
a s r e c u r r e n t s e l e c t i o n i s d i s c u s s e d b r i e f l y .
KHAMANKAR, Y . G . 1966.
I n d u c t i o n o f p o l y p l o i d y b y c o l c h i c i n e
t r e a t m e n t i n some o f t h e crop p l a n t s .
Nagpur A g r i c . C o l l . Mag. (Spec. Res. N o . ) :
101-102. 558
KRISHNASWAMY, N . , and G.N.R. AYYANGAR. 1935.
Chromosome number in Cajanus indiaus
Spreng. C u r r . S c i . 3 : 6 1 4 - 6 1 5 . 559
The chromosome number of d h a l , Cajanus
indiaus S p r e n g . , an i m p o r t a n t I n d i a n p u l s e ,
had n o t been determined b e f o r e . The method
o f bud f i x a t i o n i s d e s c r i b e d . The m e t a -
phase p l a t e gave 11 p a i r s ; t h i s number 11
is t h e b a s i c number of t h e Phasioleae, of
which Cajanus is one. A number of seconda
r y n u c l e i were a l s o s e e n .
KUMAR, L . S . S . , A. ABRAHAM, and
V.K. SRINIVASAN. 19A5.
P r e l i m i n a r y n o t e o n a u t o t e t r a p l o i d y i n
Cajanus indiaus Spreng. P r o c . I n d i a n Acad.
S c i . ( S e c t . B ) . 2 1 : 3 0 1 - 3 0 6 . 560
C o l c h i c i n e - i n d u c e d t e t r a p l o i d s were compar
e d w i t h d i p l o i d s f o r m o r p h o l o g i c a l and
o t h e r c h a r a c t e r s . W i t h t h e e x c e p t i o n o f
l e a f and f l o w e r s i z e , t h e t e t r a p l o i d c h a ­
r a c t e r s showed an i n c r e a s e in comparison
w i t h the d i p l o i d s . A n i n v e s t i g a t i o n o f
m e i o s i s i n t h e t e t r a p l o i d showed t h a t the
number o f m u l t i v a l e n t s formed i s f a i r l y
h i g h , r e s u l t i n g i n p a r t i a l s t e r i l i t y .
KUMAR, L . S . S . , H.K.S. RAO, and M.V. THOMBRE.
1966.
I n t e r s p e c i f i c and 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 i n the b r e e d i n g o f crop p l a n t s .
I n d i a n J . Genet. P 1 . Breed. 26A:
114-120. 561
Twenty-one t r u e t r i p l o i d F 1 h y b r i d s
d e r i v e d from d i p l o i d Pennisetum typhoides X
t e t r a p l o i d P. purpureum were c o m p l e t e l y
s t e r i l e and b a c k c r o s s i n g t o e i t h e r p a r e n t
was u n s u c c e s s f u l . An a n a l y s i s of t h e
c y t o l o g i c a l and m o r p h o l o g i c a l c h a r a c t e r s
of i n t e r g e n e r i c h y b r i d s between Cajanus and
Atylosia is a l s o p r e s e n t e d .
KUMAR, L . S . S . , and M.V. THOMBRE. 1958.
An i n t e r g e n e r i c h y b r i d of Cajanus aajan
( L . ) M i l l s p . X Atylosia lineata W. and A.
J. U n i v . Poona 1 2 : 1 3 - 1 6 . 562
KUMAR, L . S . S . , M.V. THOMBRE, and R. D'CRUZ.
1958.
C y t o l o g i c a l s t u d i e s o f a n i n t e r g e n e r i c
h y b r i d of Cajanus aajan ( L i n n . ) M i l l s p . and
Atylosia lineata W. & A. P r o c . I n d i a n
Acad. S c i . ( S e c t . B) 4 7 : 2 5 2 - 2 6 2 . 563
D e t a i l s are p r e s e n t e d of t h e chromosome
morphology and m i c r o s p o r o g e n e s i s of
C. c a j a n , A. lineata, and t h e F 1 h y b r i d s
between these two s p e c i e s ; in each case
the chromosome number was found to be
2 n = 2 2 . The p a r e n t s were thought to be
c l o s e l y r e l a t e d because o f the s i m i l a r i t y
between t h e i r chromosome complements.
However, s t r u c t u r a l d i f f e r e n c e s between
chromosomes of the two species may have
accounted f o r the p a r t i a l a b o r t i o n o f seed
and t h e low percentage of p o l l e n germinat
i n g i n t h e h y b r i d , i n w h i c h a l s o some
q u a d r i v a l e n t s , b r i d g e s , and fragments were
seen d u r i n g m e i o s i s . C. aajan had been
crossed w i t h A. lineata in o r d e r to combine
the w i l t r e s i s t a n c e o f t h e l a t t e r w i t h t h e
d e s i r a b l e agronomic c h a r a c t e r s o f t h e
f o r m e r .
NAITHANI, S.P. 1 9 4 1 .
C y t o l o g i c a l s t u d i e s o n I n d i a n p u l s e s , P a r t
1. The somatic chromosomes and t h e p r o ­
chromosomes of Cajanus. P r o c . N a t . Acad.
S c i . I n d i a 1 1 : 6 7 - 7 3 . 564
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