The Journal of Research ANGRAU
Contents of 41(1) 2013 - acharya ng ranga agricultural university
Contents of 41(1) 2013 - acharya ng ranga agricultural university
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NIRMALA et al<br />
weight <strong>of</strong> pods per plant (17.67), kernel weight per<br />
plant (12.93) and plant height (67.00) whereas, cluster<br />
XIV showed highest mean values for number <strong>of</strong><br />
mature pods per plant (19.20) and number <strong>of</strong> sound<br />
mature kernels per plant (31.6). Cluster X showed<br />
high mean values for harvest index (47.0), shelling<br />
out turn (82.18) and the genotypes <strong>of</strong> the clusters<br />
XIII possessed high mean value for 100 seed weight<br />
(59.33) and number <strong>of</strong> primary branches per plant<br />
(6.67).<br />
Among various traits studied, the highest<br />
contribution (Table 3) towards divergence was found<br />
for number <strong>of</strong> secondary branches per plant (29.89%)<br />
followed by CGR at 75 DAS to harvest (18.39%) CGR<br />
at 30-75 DAS (10.57%), 100 seed weight (8.51%),<br />
plant height (8.51%), SCMR (6.9%) and harvest index<br />
(5.75%). <strong>The</strong> manifestation <strong>of</strong> genetic diversity due<br />
to number <strong>of</strong> secondary branches per plant was<br />
reported by Muralidharan and Manivannan (2004),<br />
Garajappa et al. (2005), Dolma et al. (2010) and<br />
Pavan kumar (2010) for harvest index, Sonone et al.<br />
(2011) for plant height and 100 seed weight. <strong>The</strong>se<br />
results corroborate with the findings <strong>of</strong> present study.<br />
<strong>The</strong> data on inter cluster distances and per<br />
se performance <strong>of</strong> genotypes were used to select<br />
genetically diverse and agronomically superior<br />
genotypes. <strong>The</strong> genotypes exceptionally good for one<br />
or more characters seemed to be more desirable.<br />
On this basis, CAUG-1, CSMG 2006-6, LGN 123, R-<br />
2001-2, and TCGS 150 were selected. Inter crossing<br />
<strong>of</strong> divergent groups would lead to greater opportunity<br />
for crossing over and realizing hidden potential<br />
variability by disrupting the undesirable linkages. <strong>The</strong><br />
progenies obtained from such diverse genotypes<br />
provides a greater scope for isolating transgressive<br />
segregants in advanced generations particularly in<br />
segmental allotetraploid like groundnut. Hence these<br />
genotypes could be utilized in a multiple crossing<br />
programme to recover desirable transgressive<br />
segregants.<br />
Table 1. Distribution <strong>of</strong> 30 genotypes <strong>of</strong> groundnut in different clusters (Tocher’s method)<br />
Cluster No. No. <strong>of</strong><br />
Genotype(s)<br />
genotypes<br />
I 10 TCGS 876, ICGV 00351, Tirupati 4, TPT 25, TPT 1, ICGV 91114,<br />
Narayani, DH 218, TCGS-913 ,TPT-2<br />
II 6 TCGS 901A, UG 6, K 1392, TCGS 901 A, GPBD 4, PBS 30086<br />
III 1 CSMG 2006-6<br />
IV 1 TCGS-584<br />
V 1 TCGS-150<br />
VI 1 CTMG 7<br />
VII 1 TG 68<br />
VIII 1 CSMG 2006-6<br />
IX 1 RTNG 2<br />
X 3 K 1463, Greeshma, Bheema<br />
XI 1 J 71<br />
XII 1 CAUG 1<br />
XIII 1 LGN 123<br />
XIV 1 R-2001-2<br />
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