ANALYSIS OF MORPHO-MOLECULAR DIVERSITY, COMBINING ABILITY AND STABILITY IN MAIZE (Zea mays L.)
Loading...
Date
2013-11-20
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
University of Agricultural Sciences GKVK, Bangalore
Abstract
An investigation was carried out at ZARS, V.C. Farm, Mandya;
ARS, Bavikere and Farmer's field, Yatnahalli village, Ranibennur Tq. to
analyze the morphological and molecular (SSR) diversity, combining
ability of inbreds and stability of hybrids for 16 morphological characters
during kharif 2012. Pooled analysis of variance revealed significant
differences among 100 inbreds and 225 hybrids for all the 16 characters.
One hundred inbreds were grouped into 10 clusters and cluster I (48)
accommodated maximum number of inbreds. The character days to
brown husk contributed highest for total divergence and the inbred MAI-
706 recorded highest mean values for more number of characters. At the
molecular level, inbreds were grouped into seven clusters and cluster III
was the largest with 35 entries. A total of 213 SSR alleles were detected
and the marker umc2078 sampled highest number of alleles and
maximum PIC was observed for umcl542. There was no agreement
between morphological and molecular diversity. Predominance of additive
genetic variance was noticed for characters grain yield, test weight, grain
rows per cob, cob length and cob girth. The inbreds LM-13,V-1712-1,
V-1154 and CIMMYT-5 were good general combiners and the crosses
MAI-117 x LM 13, Z-62-67 x MAI 105 and Z-62-55 x LM 13 were good
specific combiners.The crossesCIMMYT-5 x LM 13, LTP-1 x SKV 50 and
CIMMYT-5 x SKV 50 manifested significant standard heterosis for
highest number of characters.The test hybrids V-2232 x MAI 105,
V-1649 x MAI 105, CIMMYT-5 x LM 13, V-1712-1 x MAI 105, Z-63-30 x
LM 13, V-632-112 x LM 13, V-1168 x LM 13, V-291-2 x LM 13, V-632-67
x LM 13, CML-172 x MAI 105, V-1154 x LM 13, V-241-2 x LM 13,
CIMMYT-47 x LM 13, Z-51-1 x LM 13, HKI-193-1 x LM 13,
V-2232 x LM 13 and V-1649 x LM 13 were stable with high grain yield
and could be further evaluated for confirmation of their superiority.
Description
Keywords
null