TABLE 1

Temperature-dependent viability of hybrids from wild-type and marker stocks

Number hybrid females (males in parentheses)a
Female parent (All D. melanogaster)Male parentTemp.AliveDead, eclosedDead, pharateTotalViabilityb (%)
A.D. mauritiana
Oregon-Rw18°76328193.8
25°32591034494.5
29°31516833992.9
Oregon-RC164.125°286101230892.9
29°333301237588.8
Oregon-RIso 15225°62516891.2
29°33013534894.8
Nguruman-4Iso 15218°948710986.2
25°425115872.4
29°6553010065.0
Oregon-RIso 19725°1981620596.6
29°551711524122.8
Nguruman-4Iso 19718°1189613388.7
25°4418248651.2
29°374310318320.2
B.D. simulans
Oregon-Rw50125°322305558.2
Nguruman-4w50125°1922165733.3
29°0126270
Oregon-Rv18°181113923178.4
25°163952328158.0
29°0151731880
Oregon-Rryi8318°1262413295.5
25°1147471950.5
29°032142170
Nguruman-4ryi8318°980098100.0
25°263456540.0
29°0372750
Oregon-Rv f218°39671942293.8
25°32112433795.3
29°13156722415.4
Oregon-Rv f2; +/ryi83c25°32119516568147.1
Oregon-R+; ryi83/+ d25°1951736743544.8
Oregon-RC167.418°244231728485.9
25°23240443077.5
29°1161001170.9
Nguruman-4C167.418°68217195.8
25°582038171.6
Oregon-RTsimbazaza18°2246623694.9
25°13149622245.8
29°022172190
Nguruman-4Tsimbazaza18°44124793.6
25°1033307313.7
29°0051510
Oregon-REthiopia18°23662526788.4
25°1422165241034.6
29°0545500
Nguruman-4Ethiopia18°72077991.1
25°1000210298.0
29°31958803.8
Oregon-RLhr18°69137394.5
(92)(1)(0)(93)(98.9)
25°41164885.4
(51)(4)(5)(60)(85.0)
29°10481112384.6
(3)(2)(42)(47)(6.4)
C.D. sechellia
Oregon-Rw18°69562515046.0
25°0294960
Nguruman-4w18°11811012991.5
25°21681992.0
Oregon-Rv18°291181522999.7
25°0042420
Nguruman-4v18°8652011177.5
25°12451761.3
Oregon-R228.118°78647521735.9
25°0127280
Nguruman-4228.125°02570
Oregon-RIso 2418°131210513010.0
25°0155560
Nguruman-4Iso 2418°22032588.0
25°02137580
Oregon-RIso 425°0570750
  • a Excluding crosses with D. simulans Lhr males, some crosses produced a small number of live males (no more than four) that were assumed to be exceptional and are not shown. The crosses of Nguruman-4 females to Iso 152 and Iso 197 D. mauritiana males at 18° produced 4 and 12 dead pharate males, respectively, that may be (nonexceptional) hybrids carrying the D. melanogaster X chromosome (see text).

  • b Viability equals the number of live animals divided by total animals.

  • c D. simulans F1 sons from the cross v f2 females to ryi83 males.

  • d D. simulans F1 sons from the cross ryi83 females to v f2 males.