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Genetic interaction and mapping studies on the leaflet development (lld) mutant in Pisum sativum

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Title Genetic interaction and mapping studies on the leaflet development (lld) mutant in Pisum sativum
 
Creator Kumar, Sushil
Mishra, Raghvendra Kumar
Kumar, Arvind
Chaudhary, Swati
Sharma, Vishakha
Kumari, Renu
 
Subject Afila
cochleata
insecatus
LEAFLET DEVELOPMENT gene
lld phenotypes
maximo-reducticus
multifoliate-pinna
tendril- less
unifoliata tendrilled-acacia
 
Description In Pisum sativum, the completely penetrant leaflet development (lld) mutation is known to sporadically abort pinnae suborgans
in the unipinnate compound leaf. Here, the frequency and morphology of abortion was studied in each of the leaf suborgans
in 36 genotypes and in presence of auxin and gibberellin, and their antagonists. Various lld genotypes were constructed
by multifariously recombining lld with a coch homeotic stipule mutation and with af, ins, mare, mfp, tl and uni-tac leaf
morphology mutations. It was observed that the suborgans at all levels of pinna subdivisions underwent lld-led abortion
events at different stages of development. As in leafblades, lld aborted the pinnae in leaf-like compound coch stipules. The
lld mutation interacted with mfp synergistically and with other leaf mutations additively. The rod-shaped and trumpet-shaped
aborted pea leaf suborgans mimicked the phenotype of aborted leaves in HD-ZIP-III-deficient Arabidopsis thaliana mutants.
Suborganwise aborted morphologies in lld gnotypes were in agreement with basipetal differentiation of leaflets and acropetal
differentiation in tendrils. Altogether, the observations suggested that LLD was the master regulator of pinna development. On
the basis of molecular markers found linked to lld, its locus was positioned on the linkage group III of the P. sativum genetic
map.
The financial support of Indian National Science Academy and
Council of Scientific and Industrial Research (CSIR) in the form of
Scientistships to SK, and facilities provided by NIPGR are gratefully acknowledged.
 
Date 2014-06-06T05:53:38Z
2014-06-06T05:53:38Z
2012
29 August 2012
 
Type Article
 
Identifier J. Genet., 91(3): 325-342
http://hdl.handle.net/123456789/252
 
Language en
 
Publisher Indian Academy of Sciences