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. 2017 Jul 25;12(7):e0181541. doi: 10.1371/journal.pone.0181541

Table 6. Summary of mean squares and significant tests of combining ability effects for tuber yield and growth traits under water stressed conditions for potato families evaluated at Adet, Ethiopia.

Source of variation d.f TTY MTY ATW GC PHT CC
Set 1 0.0125* 0.018** 187.80*** 144.43* 695.40*** 6.13*
Replication (set) 2 0.0003ns 0.002ns 104.18*** 64.95ns 173.14*** 13.10**
GCAf 6 0.0160*** 0.014*** 77.56*** 128.44*** 158.50*** 20.32***
GCAm 6 0.0147*** 0.022*** 235.51*** 135.45*** 171.05*** 30.89***
SCA 18 0.0079*** 0.008*** 74.39*** 88.16*** 32.63*** 5.32***
Error 30 0.0017 0.001 3.06 23.95 8.29 0.92
GCA/(GCA+SCA)% 65.992 68.39 67.79 59.95 83.47 82.81
Contribution of GCAf 34.340 26.43 16.79 29.18 40.15 32.86
Contribution of GCAm   31.652 41.95 50.99 30.77 43.32 49.95

d.f., degrees of freedom; TTY, total tuber yield (kg plant-1); MTY, marketable tuber yield (kg plant-1); ATW, average tuber weight (g); GC, groundcover (%); PHT, plant height (cm); CC, chlorophyll content (SPAD reading); GCA, general combining ability; GCAf, general combining ability for female, GCAm, general combining ability for male; SCA, specific combining ability.

*** p < 0.001

** p < 0.01

* p < 0.05

non-significant at p value 0.05.